What we handle
Engine repair and replacement we handle in Mays Landing, NJ
Eight bays, foreign and domestic, gasoline and hybrid. The engine is the longest-running specialty at the shop and the work that built the reputation since 1981.
Diagnostic protocol before tear-down
Every engine job starts with the test layer. Compression dry then wet, leak-down to isolate rings vs valves vs head gasket, cooling-system pressure to catch a combustion leak, oil sample to read internal wear. No tear-down before the data points to the failure. The check engine light diagnostic workflow gates everything.
Common examples: Compression test (dry + wet), Cylinder leak-down %, Cooling-system pressure, Oil sample inspection
Engine repair work we handle
Repair when the engine is salvageable. ASE-certified technicians on the bench. Aluminum or iron heads, interference or non-interference timing, gasoline or hybrid. Cooling-system repair often pairs with engine work because the cooling failure is what damaged the engine.
Common examples: Head gasket replacement, Valve cover + oil-leak repair, Timing chain, guides, tensioner, Timing belt + water pump bundle
Engine replacement options
When the engine has to come out, we quote all three sources with warranty math on the written estimate. We bundle the timing belt or chain, water pump, motor mounts, spark plugs, belts, and hoses because the labor to access those parts is already in the bill. The savings stay on your estimate, line by line.
Common examples: Used long blocks (salvage), Rebuilt long blocks, Remanufactured long blocks, Bundled timing, water pump, mounts
Items we refer to the dealer
Honest boundary. Warranty engine claims belong at the dealer. Recall reflashes are dealer-only by software. Rare or exotic complete rebuilds go to a specialty rebuilder; we install OEM long blocks and trusted reman, but we do not do custom builds on platforms outside our wheelhouse.
Common examples: Warranty engine claims, Recall reflashes, ECU reprogramming, Exotic complete rebuilds
If you have been told you need an engine, bring the quote. We will look at the diagnosis, run our own compression and leak-down, and tell you whether the verdict was right. Sometimes it is. Sometimes the actual failure is a head gasket, a valve job, or a timing-chain repair that costs a fraction of a long-block install.
Signs your engine needs to be looked at
Engines warn before they fail. The trick is knowing which symptoms are scheduled-maintenance issues and which mean the engine is hurting.
Knocking or ticking that gets louder with RPM
Worn timing chain or a failing lifter on most engines. A rod knock on the worst-case version. The compression test tells us which.
Burning oil between changes
Worn valve guides, worn piston rings, or a PCV system fault. Internal vs external diagnosis tells us where the oil is going (out the exhaust, past the rings, or onto the ground in a leak you missed).
Temperature gauge climbing toward hot
Cooling system fault first, head gasket second. Driving it once you see hot is how the bill goes from a thermostat to a long block.
White exhaust on startup or coolant in oil
Head gasket or cracked head. Tow it. Do not drive a head gasket with mixed fluids.
Check engine light with a misfire across multiple cylinders
A misfire on one cylinder is usually a spark plug, coil, or injector. A misfire that wanders or sits on multiple cylinders is sometimes compression-related, not ignition.
Hard starting in cold weather
Low compression on one or more cylinders shows up first when the engine is cold and the oil is thicker.
Loss of power at highway speed
Timing off, compression low, or a clogged catalytic converter. The diagnostic split is straightforward once the scan and compression numbers are on the table.
Another shop quoted you a new engine
Bring the quote. We pull the codes, run compression and leak-down, and tell you whether the verdict was right. AAA Approved Auto Repair status means the pricing and quality are independently audited.
Two or more at once, do not wait. An engine that is hurting will keep hurting itself. Schedule the diagnostic before the symptom decides for you.
Engine service for Mays Landing and Atlantic County drivers
Same family, same eight bays, same corner of Mays Landing since 1981. We serve Hamilton Township, Egg Harbor Township, Northfield, Somers Point, Folsom, Buena Vista, and the rest of Atlantic County. Fred Kneble has been turning wrenches here for decades. Nancy Kneble runs the shop and the books.
Engine work is the longest-running specialty at the shop. Customers bring us cars that other shops gave up on, cars from the dealer with quotes that did not match the actual diagnosis, and cars they have owned for 15 years where the question is whether to put a long block in or move on. We give the math both ways and let the owner decide.
South Jersey driving patterns matter. Short-trip school-run commutes leave engines below operating temperature for most of the drive, which accelerates fuel dilution on Honda 1.5T, carbon buildup on every DI engine, and condensation in the oil. Long-haul AC-on summer drives down the Expressway stress cooling systems already weakened by salt corrosion. We tell new customers to expect a longer first visit because we are reading the maintenance history before quoting any work.
Helpful details to mention
- Vehicle year, make, model, and engine size
- Current mileage
- The exact symptom (noise, smoke, oil use, overheat, no-start)
- When it started and whether it is getting worse
- Maintenance history (last oil, last timing service, last coolant flush)
- Whether the car has been overheated and how many times
- Any prior diagnosis or estimate from another shop
The more we know up front, the more accurate the estimate and the faster the diagnostic.
Customer proof
Service was performed quickly and the Kneble Team provided great communication throughout the visit.Robert Orzechowski, Google review
Questions before scheduling?
Talk with us about Engine Repair & Diagnostics
Tell us the year, make, model, engine size, mileage, and what changed. Written estimate before any work begins.
Service guide
Engine Repair & Diagnostics Service Guide
Topic-based reference for the diagnostic protocol that gates every engine job at Kneble's, the repair-vs-replace math we walk customers through, the used vs rebuilt vs remanufactured engine-source decision, the named-engine failure modes we see most on direct-injection platforms, and the NJ-specific OBD-II readiness timing that follows any major engine work.
In this guide
- How we diagnose an engine before any tear-down
- Engine repair vs engine replacement, the way we frame the math
- Used vs rebuilt vs remanufactured long blocks
- Head gasket, timing chain stretch, and oil consumption (the named-engine failures we see most)
- Overheating, NJ emissions, and what major engine work means for your next inspection
- Misfire diagnosis tree: coil, plug, injector, compression, timing
- Direct-injection carbon buildup and the walnut-shell blast fix
- Brand failure modes we know on sight (Subaru, Hyundai-Kia, BMW, Honda, Ford)
- PCV failure cascade: how a 30-dollar valve causes 3,000 dollars of damage
- Engine repair services and related spoke pages
01 of 10, How we
How we diagnose an engine before any tear-down
Every engine job at Kneble's starts the same way. Compression dry then wet against the manufacturer spec for that engine. Cylinder leak-down on any cylinder that came back low to isolate where the air is going (rings, valves, or head gasket). Cooling-system pressure test to catch a combustion leak. Oil sample inspection when the wear pattern matters. We have been doing this work in Mays Landing since 1981 across thousands of vehicles, foreign and domestic, and the test layer is what separates an honest verdict from a guess. ASE-certified technician Fred Kneble reviewed the diagnostic protocol on this page.
Read more about How we diagnose an engine before any tear-down
Our ASE-certified technicians do exactly this work. Engine problems rarely live in one system, so the diagnosis crosses several. The check engine light diagnostic page covers the scan-tool gateway; this section covers what the scan tool cannot tell you on its own.
Compression test (manufacturer spec, dry + wet)
Compression is the foundation. We pull every spark plug, screw in a calibrated compression gauge, and crank the engine to record peak pressure on each cylinder. Dry first. Then we squirt a measured amount of oil into any cylinder that came back low and re-test wet. If the wet number jumps significantly, the leak is past the rings. If it does not move, the leak is at the valves or the head gasket. The manufacturer spec for your engine is the number we compare against, not a generic threshold.
Cylinder leak-down test (the percentage that decides repair vs replace)
Leak-down pressurizes a cylinder at top-dead-center with regulated compressed air and measures how much escapes. Anything under 10 percent is healthy. 10 to 20 percent is borderline. Above 20 percent something is wrong and you can usually hear where: air at the tailpipe means exhaust valve, air at the throttle body means intake valve, air at the oil filler cap means rings, air bubbling in the coolant reservoir means head gasket. The percentage and the listening test together decide repair vs replace before any parts come off.
Cooling-system pressure test
A pressure tester on the radiator filler neck pumps the cooling system up to operating pressure and watches the gauge. A pressure drop with no visible external leak almost always means coolant is going into a combustion chamber through a failed head gasket or a cracked head. We confirm with a chemical block test that detects exhaust gas in the coolant. The combination catches head-gasket failures that have not yet shown the classic milky-dipstick or white-exhaust symptoms.
Oil sample inspection
When the compression and leak-down are borderline OR when the customer is deciding whether to put a long block into an older car, we send an oil sample to Blackstone Labs for spectral analysis. Iron, copper, lead, aluminum, and silicon in the oil tell us which internal component is wearing and how fast. Coolant in the oil confirms a head-gasket verdict the pressure test suggested. Fuel dilution flags a leaking injector or rich-running fuel system. The sample takes a week to come back but it answers "is this engine worth saving" before you spend on the repair.
Want a real diagnostic before you decide?
Call (609) 625-3286From the shop library: Article Should I Repair or Replace My Vehicle? Video Why Driving Your Vehicle Can Turn Off Your Check Engine Light
02 of 10, Engine repair
Engine repair vs engine replacement, the way we frame the math
The question every customer asks. The honest answer is the math, not a philosophy. We quote both numbers when both are realistic. Fred has stood in the bay with thousands of these decisions; the four-flag rule below comes from decades of watching which cars survived the engine bill and which did not.
Read more about Engine repair vs engine replacement, the way we frame the math
Repair gets the nod when one specific failure caused the symptoms and the rest of the engine still makes spec compression: a head gasket on an otherwise sound bottom end, a timing-chain repair on a 130,000-mile engine that still hits the compression number, a valve job on a head with worn guides but a healthy block. Replacement gets the nod when the bottom end is damaged (spun rod bearing, scored cylinder, low compression across multiple cylinders), when the head-gasket failure has been driven on long enough to warp the block, or when the cumulative repair cost exceeds 60 to 70 percent of the replacement cost.
When repair is the right call
Compression numbers within spec on every cylinder. One isolated failure (head gasket OR timing chain OR valve job, not all three). Cooling system intact. No history of repeat overheats. Repair is usually 30 to 50 percent of replacement on these jobs, the car drives away that week, and the rest of the engine has years of life left.
When replacement is the right call
Bottom-end damage (rod knock, low compression across multiple cylinders, oil pressure below spec). Warped block after a sustained overheat. Cracked head that cannot be machined back to flat. Multiple major systems failing at once (head gasket AND timing chain AND oil consumption). At that point the math points to a long block; repairing one system at a time costs more in cumulative labor than the swap and leaves you driving a tired engine.
The 60 to 70 percent threshold rule
If the total repair quote (parts + labor) lands above 60 to 70 percent of what a comparable used or reman long block install would cost, replacement is the right call. The repair preserves the worn rest-of-engine; the long block resets the clock. The threshold is a guideline, not an absolute. A customer who plans to drive the car for two more years has a different break-even than a customer who plans to drive it for ten.
The four-flag rule (when to walk away from the engine entirely)
The flags that we will say so out loud: the engine needs major work AND the transmission is showing wear AND the suspension is tired AND the body has rust starting AND the car has 220,000-plus miles. Any one of those alone is not a death sentence; the combination is. A second flag: the engine repair cost is more than 50 percent of what the car would sell for running and driving. A third: the car has already had one major repair within the last 18 months and now needs another. None of these are absolute rules. A truck a contractor needs for work has a different value than the same truck a teenager drives to a part-time job. The deeper math lives on the repair-vs-replace companion post.
Bring the quote. We will quote the same job both ways.
Schedule a second opinionFrom the shop library: Article The Dangers of Driving Your Car Through Flood Water Video Why Your Check Engine Light Does Not Turn Off After A Repair
Tell us what changed, when it started, and what you drive. We can help decide whether to start with an inspection, alignment check, or related repair.
03 of 10, Used vs
Used vs rebuilt vs remanufactured long blocks
When the math points to replacement, three sources exist and they trade cost for warranty. We have installed Jasper, ATK, and OEM factory reman long blocks for decades. The bundle list below comes from what we have learned saves customers real money over doing those jobs one at a time later.
Read more about Used vs rebuilt vs remanufactured long blocks
Used long blocks (salvage core)
Pulled from wrecked or retired vehicles at salvage yards. Maintenance history typically unknown. Cheapest part on the estimate. Warranty is typically 30 days on the part only, which means if the used engine fails, you pay the labor to install it again. That risk is the real cost. We use used cores when the customer is on a tight budget AND the car has a finite remaining service window (one or two more years), so the math accepts the warranty exposure.
Rebuilt long blocks
A rebuilder takes your existing engine (or a core), disassembles it, replaces worn components (pistons, rings, bearings, seals, rods, sometimes the crank if needed), cleans the block to factory tolerances, and reassembles it. The warranty is usually parts and labor for a year or longer. The build quality depends entirely on the rebuilder; we have built a list of rebuilders over the years whose work we trust.
Remanufactured long blocks
Reman goes further than rebuilt. Every wearable component is replaced to meet or exceed original manufacturer specifications, the block and heads are inspected and machined as needed, and the assembled engine is dyno-tested before it ships. Factory reman from the OEM and aftermarket reman from Jasper or ATK are the strongest warranties in the engine world (often three years or 100,000 miles, parts and labor included). The price is the highest of the three sources. On uncommon platforms (some European, some low-volume trucks) reman is often the only realistic option because the used-core market is thin.
What we bundle with every engine swap
A long-block swap is the right time to replace the timing belt (or chain + guides), water pump, motor mounts, spark plugs, belts, hoses, and any accessory that is past its life. The labor to access those parts is the same labor already in the bill. Bundling saves real money over doing those jobs one at a time later. We list every bundled part on the written estimate so you see the savings. Cooling system parts get bundled because the swap opens the cooling loop anyway. Fresh oil and a new filter ride out with the engine; an oil change on every reman install is non-negotiable so the warranty stays valid.
Ask which option fits your platform.
Call (609) 625-3286From the shop library: Video The Different Colors of Cooling Fluid
04 of 10, Head gasket
Head gasket, timing chain stretch, and oil consumption (the named-engine failures we see most)
Three failure modes dominate the modern direct-injection era. We see the EA888 cold-start rattle and the N20 / N55 oil consumption pattern on this lift every week. The diagnostic-first approach catches all three before they become bigger bills.
Read more about Head gasket, timing chain stretch, and oil consumption (the named-engine failures we see most)
Head gasket failure signs and the cooling-system test
Classic signs: coolant in the oil (milky dipstick), white exhaust steam on startup that smells sweet, overheating without an external leak, bubbling in the coolant reservoir at idle, or oil in the coolant (chocolate-milk overflow tank). The cooling-system pressure test and the chemical block test confirm a head-gasket verdict before we pull the head. We do not crack a head open on a guess. Aluminum heads warp when overheated; if the head needs to come off, we send it out for resurfacing or replacement based on the warpage measurement.
Timing chain stretch on direct-injection engines
The cold-start rattle on the EA888 (Volkswagen and Audi 2.0T, see VW repair), the M271 (Mercedes 1.8 supercharged), and the N20 / N55 (BMW 2.0T and 3.0T, see BMW repair) is the same root cause: chain guides wear, chain stretches, cam timing drifts out of spec, the tensioner cannot keep up at cold start. We read cam-timing variance via the scan tool before any tear-down to confirm the chain stretch verdict. Most shops do not pull that data; they replace the timing chain on the rattle alone and miss the cam variance number that says how soon. Ignored long enough, the chain skips a tooth and the engine bends valves. Caught at the rattle, it is a scheduled timing-chain repair.
Oil consumption diagnosis matrix
Oil consumption on the same direct-injection family (Audi 2.0T EA888, see Audi diagnostic services, BMW N20 / N55, Subaru EJ, Honda K24) is usually PCV system or valve cover seal weep, not bottom end. We measure consumption across a 1,000-mile test (we mark the oil level on the dipstick, fill to spec, and have the customer drive normal commutes for 1,000 miles before re-checking). A quart in 1,000 miles is the manufacturer threshold most of these engines tolerate. A quart in 500 miles is a fix. Internal vs external diagnosis tells us where the oil is going: external leak shows up on the lift; internal consumption shows up in the exhaust on a cold start (blue puff) or on the spark plug ceramic insulators when we pull them.
Valve cover gasket and PCV system failures
Valve cover gasket leaks are the most common engine leak we see across every platform. The gasket hardens with heat, oil seeps onto the head, runs down the block, hits the exhaust, and burns. The smell is the diagnostic. Repair is straightforward: pull the cover, scrape the old gasket, install the new gasket with the correct torque sequence, replace any plug-tube seals that share the cover. PCV system failures (stuck PCV valve, cracked PCV hose, blocked oil separator on direct-injection engines) cause crankcase pressure to spike, oil to push past seals, and oil consumption to climb. PCV diagnosis is a vacuum-gauge test plus a visual on the hose routing.
Hearing a cold-start rattle? Call before the chain skips.
Call (609) 625-3286From the shop library: Video The Difference Between Check Engine Light vs. Service Engine Soon Light
Tell us the year, make, model, and what you are noticing, and we will say what to check first.
05 of 10, Overheating, NJ
Overheating, NJ emissions, and what major engine work means for your next inspection
Two state-specific issues stack on every major engine job in New Jersey. Kneble's is a licensed NJ State Inspection Station. We diagnose check engine lights and emissions codes, make the needed repairs, and re-inspect once the work is complete.
Read more about Overheating, NJ emissions, and what major engine work means for your next inspection
How overheating compounds the bill
A common mistake: the temperature gauge spikes, you pull over, let the engine cool, and keep driving until it overheats again. Every repeat compounds the damage. Warped cylinder heads (aluminum heads expand unevenly when overheated; once the sealing surfaces are no longer flat, combustion pressure escapes through the gaps). Cracked or warped head gaskets (heat compromises the seal; coolant leaks into the cylinders, the oil passages, or both). Piston and cylinder damage (aluminum pistons and cylinders expand when they overheat; in extreme cases pistons score the cylinder walls or seize entirely). Spun rod bearings if oil viscosity collapsed during the overheat. All of these repairs are expensive, and all of them start with ignoring the temperature gauge. If you see it climbing toward hot, pull over in a safe area and have the vehicle towed. Do not drive it. The tow bill is a fraction of the repair bill.
NJ OBD-II readiness monitors (the drive cycle that flips "not ready" to "ready")
New Jersey requires an OBD-II emissions inspection every two years on most light-duty gasoline vehicles. A car with a check engine light on will fail. A car that has just had a battery disconnect or a recent code clear will fail readiness because the OBD-II monitors have not reset. After any major engine work or battery disconnect, the OBD-II system needs a drive cycle (sometimes two) before the readiness monitors flip from "not ready" to "ready." Bring a car in for an NJ inspection the day after a head-gasket job and it will fail readiness even if it runs perfectly. We tell every customer to drive normally for at least 100 miles after major engine work before scheduling the state inspection.
What we check on the verify step before pickup
Before keys go back, we scan for codes that would cause an emissions failure even when the car runs fine: a misfire monitor that will not complete because of a borderline ignition issue, an EVAP code from a fuel-cap or purge-valve problem, an oxygen-sensor code that has been hanging out, a catalyst-efficiency code that signals a cat failure was the actual root cause. Cooling system pressure retested. Compression retested on rebuild or head-gasket work. NJ state inspection readiness monitors confirmed. The next inspection passes without a return trip; that is the whole point of the verify step.
When to tow vs when to drive
Tow it when: the temperature gauge is in the red, the oil pressure light is on, you hear knocking from the bottom of the engine, there is smoke from the engine bay, coolant is pouring out, or the engine just stopped running and will not restart. Drive it (carefully, short distance) when: a check engine light is on but the engine runs normally, an oil drip on the driveway has not changed, the noise is intermittent and goes away with RPM, or the symptom is a slow developing issue you have been tracking. When in doubt, call (609) 625-3286 before you turn the key. Emissions repair often starts with this call because the cause of the emissions code was the no-tow driving that compounded damage.
Major engine work behind you? Drive 100 miles before the state inspection.
Call (609) 625-3286From the shop library: Video Top 5 Smells You Do Not Want Coming From Your Car
06 of 10, Misfire diagnosis
Misfire diagnosis tree: coil, plug, injector, compression, timing
A misfire is one of five things in descending order of likelihood: a failed ignition coil, a worn spark plug, a clogged or leaking fuel injector, a compression loss in that cylinder, or a timing component out of phase. Diagnosing in that order saves money because the first three are common wear items and the last two are expensive to investigate.
Read more about Misfire diagnosis tree: coil, plug, injector, compression, timing
Coil and plug
A scan-tool cylinder-balance test isolates the misfiring cylinder. Swapping the coil with a known-good neighbor and re-running the misfire counters tells us in five minutes if the coil is the cause. If the misfire follows the coil, the coil failed. If it stays with the cylinder, the plug or something deeper.
Injector
A fuel injector that has clogged or stuck open changes the injector waveform on the scan tool. On direct-injection platforms, an injector that has carboned around the tip sprays poorly even when it electrically tests fine; the symptom shows up as a cold-start misfire that clears when the engine warms.
Compression vs leak-down
Compression testing measures peak cylinder pressure on a cranking engine; numbers below 80 percent of the highest cylinder mean something is leaking. Leak-down testing pressurizes a stationary cylinder at top-dead-center and listens to where the air escapes (intake = valve, exhaust = valve, dipstick tube = rings, coolant reservoir = head gasket). Compression tells us there is a problem; leak-down tells us which part is causing it.
Timing chain stretch
On modern direct-injection engines, a stretched timing chain throws a cam-timing variance code that the misfire counter mimics. BMW N20, VW/Audi EA888 Gen 2, and Ford EcoBoost 3.5L early-build engines are the platforms where we check chain wear first when a misfire shows up at 70,000-plus miles.
From the shop library: Video What The Check Engine Light Tells You When It Lights Up
07 of 10, Direct-injection carbon
Direct-injection carbon buildup and the walnut-shell blast fix
Every direct-injection engine carbons up on the back side of the intake valves over time. The reason is mechanical: in a port-injected engine, gasoline sprays past the back of the valve and washes carbon off; in a direct-injection engine, the fuel goes straight into the cylinder and the valves never see fuel wash. Carbon accumulates from PCV oil vapor, EGR, and combustion blowback.
Read more about Direct-injection carbon buildup and the walnut-shell blast fix
Symptoms appear between 60,000 and 100,000 miles depending on driving pattern: cold-start misfires, hesitation under load, gradual fuel-economy loss, and a check engine light that comes and goes. Walnut-shell blasting is the standard fix. We remove the intake manifold, mask off the ports, and blast crushed walnut media through the intake runners with a low-pressure media gun until the valves are clean. The job is preventive past 60,000 miles on every DI engine we service: BMW N54/N55/N20/B58, VW/Audi EA888, Ford EcoBoost, GM 2.0T/3.6L, and most modern Asian DI engines.
From the shop library: Video Did You Put The Wrong Type of Oil in Your Vehicle?
08 of 10, Brand failure
Brand failure modes we know on sight (Subaru, Hyundai-Kia, BMW, Honda, Ford)
Read more about Brand failure modes we know on sight (Subaru, Hyundai-Kia, BMW, Honda, Ford)
Subaru EJ head gasket
EJ22 and EJ25 boxer engines (1997 through roughly 2012 Outback, Forester, Impreza, Legacy) develop external head gasket weeps that show up as oil drips down the side of the block and the smell of burning coolant under the hood. Catching it early saves the heads from warping. We use phosphate-free coolant on every refill because phosphate accelerates the gasket weep.
Hyundai/Kia Theta II rod-bearing recall
2.0L and 2.4L Theta II engines (Sonata, Optima, Sportage, Tucson roughly 2011 through 2019) fail at the rod bearings due to a manufacturing debris issue. NHTSA recall coverage applies to many of these and the dealer can replace under that program. We help confirm VIN coverage before any work; if your car is in the campaign, the dealer is the right call. Out of warranty, the engine replacement is on a long-block path.
BMW N20 timing chain
F30 328i, F25 X3, F10 528i and other N20 platforms (2012 through 2016) have a known timing-chain stretch issue. The symptom is a cold-start rattle that lasts a second or two and goes quiet once oil pressure builds. Ignored long enough, the chain skips a tooth and the engine bends valves. We diagnose with the scan-tool cam-timing variance reading and replace with the updated OEM chain, guides, and tensioner before the chain skips.
Honda 1.5T oil dilution
2017-plus Honda Civic, CR-V, and Accord 1.5T engines run cold in short-trip use because of how the direct-injection system warms up. Unburned gasoline ends up in the oil pan, the oil level rises, the oil thins, and the engine throws codes. Honda issued service campaigns. We catch it on dipstick smell and oil-level reading; the fix is shortened oil-change intervals plus the dealer software update where eligible.
Ford EcoBoost 3.5L early-build timing chain
2011 through 2014 F-150 EcoBoost 3.5L V6 engines have an early-build timing chain that stretches in the same pattern as the BMW N20. The symptom is a cold-start rattle and a cam-timing code. The fix is the updated OEM chain kit. Late-build 3.5L EcoBoost engines (2015-plus) addressed the issue.
From the shop library: Video 5 Problems Your Care Will Face If You Don’t Change Your Oil
We will walk through the symptoms, give you an honest read, and only recommend what the vehicle actually needs.
09 of 10, PCV failure
PCV failure cascade: how a 30-dollar valve causes 3,000 dollars of damage
The Positive Crankcase Ventilation valve is a small one-way valve that vents crankcase pressure back into the intake. When it sticks or fails, the cascade is predictable.
Read more about PCV failure cascade: how a 30-dollar valve causes 3,000 dollars of damage
Stuck closed
Crankcase pressure builds. Pressure pushes past the weakest seal first (usually the rear main, valve cover gasket, or front crank seal). Oil weeps. The fix is the PCV valve plus the leaking seal. Ignored, the oil leak hides the original problem and parts keep getting replaced one at a time.
Stuck open
Vacuum leak through the PCV system causes a lean fuel trim code, rough idle, and on direct-injection engines accelerates intake-valve carbon buildup because the unmetered air carries oil vapor across the back of the valves continuously. The fix is the PCV plus a carbon clean if the engine is past 60,000 miles.
From the shop library: Video How to Choose Between Used Engines, Rebuilt Engines, & Remanufactured Engines
10 of 10, Engine repair
Engine repair services and related spoke pages
Engine repair work splits into several focused spoke pages plus the full engine replacement work we keep here. If your job is one of the items below, the linked page has the deeper diagnostic and service detail.
Read more about Engine repair services and related spoke pages
- Timing and serpentine belt service
- Alternator and starter replacement
- Water pump replacement
- Spark plug replacement
- Engine tune-up
- Cooling system repair
- Check engine light diagnostics
From the shop library: Article Three Essentials for Road Trips After The Quarantine Video Questions to Ask Yourself When Purchasing a Used Car
Call the shop or request an appointment and include the vehicle year, make, model, mileage, and symptoms.
FAQs
Engine repair FAQs
My engine is knocking, ticking, or rattling. What could be causing it?
Several possibilities. Check the oil level first; a low-oil engine gets noisy from lack of lubrication. A worn timing chain on a high-mileage engine sounds like a rattle at idle that quiets with RPM. A valve-train issue (worn lifter, sticky valve) sounds like a tick that follows engine speed. A rod knock from a worn rod bearing is a deeper sound that gets louder with load. Bring it in and let us pinpoint the source with a stethoscope and a compression check.
What would cause my car to burn a quart of oil every month if I do not see a leak?
As engines age, parts wear and the engine can burn oil internally rather than leak it externally. Worn valve guides, worn piston rings, or a stuck PCV valve are the usual suspects. We run a leak-down test and an oil-burn diagnostic to tell whether the oil is going out the exhaust, past the rings, or onto the ground in a leak you have not spotted yet. On the EA888, N20, K24, and EJ families specifically, the answer is often a PCV system fault or a valve cover seal weep, not bottom-end wear.
What could cause my check engine light to come on?
The check engine light is the engine computer flagging a sensor reading outside spec. It can be a small issue (loose gas cap, dirty MAF sensor) or a serious one (misfire, low compression, catalytic converter failure). The scan tool reads the trouble code and we trace from there. The check engine light diagnostics page covers the scan-tool workflow; engine-mechanical codes route into the compression and leak-down workflow on this page.
Another shop told me I need a new engine. Should I get a second opinion?
Yes, and customers do this often. Bring the quote. We pull the codes, run our own compression and leak-down, and tell you whether the diagnosis was right. Sometimes it is. Sometimes the actual failure is a head gasket, a valve job, or a timing-chain repair at a fraction of the cost. AAA Approved Auto Repair status means we are independently audited on pricing and quality, so the second opinion has skin in the game.
How long does an engine repair or replacement take?
Most engine repairs are 1 to 3 days depending on the job. Head gaskets and timing services are usually 2 to 3 days. A full engine replacement is typically 5 to 7 days depending on parts availability for your platform. We give the estimated turnaround when you book.
Do you offer financing on a major engine job?
Yes. We work with several customer financing options for major repairs. Ask the service advisor when you call; we can lay out terms before the work starts.
What is the difference between a short block and a long block?
A short block is the bottom end: block, crankshaft, connecting rods, and pistons. A long block adds the cylinder heads, valvetrain, and front cover. Most engine replacements are long blocks because the heads usually need replacement or rebuilding when the bottom end has failed. A short block is the right call when the bottom end is damaged but the heads are still healthy and reusable. We quote both when both are realistic.
Does an independent shop touching my engine void my factory warranty?
No. The federal Magnuson-Moss Warranty Act prohibits a manufacturer from voiding a warranty because the owner used an independent shop for routine work, as long as the work is documented and the correct parts and fluids are used. We document every visit, use OEM or OEM-spec parts, and refer warranty-eligible items back to the dealer. The owner keeps the warranty and the lower independent-shop pricing on routine items. ASE certification + AAA Approved status means the documentation meets the standard the dealer would accept.
How does the 1,000-mile oil consumption test work?
When an engine is burning oil but the cause is not obvious, we mark the oil level on the dipstick at a known mileage, document any leaks, then have you return at the 1,000-mile point. The exact loss tells us severity (a quart per 1,000 is the manufacturer threshold for warranty consideration on most platforms). Combined with a fuel-trim scan and a visual PCV/valve-cover check, the test isolates whether the loss is bottom-end ring wear, top-end seal wear, or PCV-driven consumption before we quote any teardown.
Engine rebuild vs engine replacement: which is cheaper?
A rebuild rebores or rehones the cylinders, replaces rings, bearings, gaskets, and (depending on extent) the camshafts and valvetrain in the existing block. A replacement swaps in a remanufactured long block or a used engine of known condition. For most modern engines, the math favors replacement: a quality reman long block lands at a predictable price with a warranty, while a rebuild stretches into unpredictable territory once the shop sees what is inside. Rebuild wins on rare engines, on platforms with no good reman supply, or when the rest of the vehicle does not justify a long-block expense. We quote both paths when both are real options.
How long do modern engines last?
A modern gasoline engine that gets timely oil and coolant service, that does not run hot, and that does not have a known design defect, will run 200,000 to 300,000 miles on the original bottom end. Toyota and Honda port-injected engines (1990s through early 2010s) often pass 300,000 with original head gaskets. Direct-injection engines are showing more variability because carbon buildup, timing chain wear, and oil dilution change the math. Modern diesels can run 500,000-plus with proper care. The bottom-end metal is rarely the lifetime-limiting part anymore; the supporting systems (turbo, injection, emissions controls) wear first.
What causes an engine to overheat?
In order of frequency: low coolant from a slow leak, a thermostat stuck closed, a failed cooling fan or fan controller, a clogged radiator, a failed water pump, or in the worst case a head gasket leak introducing combustion gas into the cooling system. We pressure-test the system, run a combustion-gas test if the gauge spike was severe, and pull cooling-system codes from the scan tool before quoting any repair. See cooling system repair for the broader workflow on each cause.
Further reading and viewing
Related Kneble's coverage for engine repair
Engine-adjacent content from the Kneble's library if you want to dig deeper.
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Local shop
Visit Kneble's in Mays Landing
5473 Somers Point Road, Mays Landing, NJ 08330
Five minutes off Route 40 between the Hamilton Mall and Lake Lenape. Ten minutes from the Atlantic City Expressway Exit 17. Twelve minutes from EHT and Northfield. Fifteen minutes from Somers Point along Mays Landing-Somers Point Road. From Folsom or Buena Vista, take 322 east, then south on Somers Point Road. Freddy J's Bar & Kitchen is next door at 5698 Somers Point Road if you want to grab food while the car is in the bay.
- Mon to Fri 8am to 5pm
- Saturday 8am to 4pm
- Sunday Closed
Reviews
Trusted by South Jersey drivers
Customers come to Kneble's for clear communication, practical recommendations, and repairs handled by a local team they can reach directly.
Friendly receptionist. In and out within 45 mins.
Janet Jackson, Google review
Service was performed quickly and the Kneble Team provided great communication throughout the visit.
Robert Orzechowski, Google review
Excellent quick service by personable staff and very qualified techs at a reasonable charge.
Glenn Peterson, Google review
Very good service here. Treated us very well. Great conversation with Carmen.
Gary Mazzone, Google review