Question about 2001 Volkswagen Beetle

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My engine sound and runs good. Mechanic said is the crankshaft because he found pieces of metals in the oil filter. And need to replace the engine is that right? But if he replaces the crankshft he will not guarantee the work...

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The crankshaft wore for some reason,and he knows this,and does not want to stick his neck out.It is quite a gamble to do this ,I can understand him completly,and not knowing ,exactly what caused the wear,is shooting in the dark.

Posted on May 28, 2010


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3.1L has rod knock. I have 20yrs of auto mechanic and built a few engines, but retired now.

If the knocking is from the bottom of the engine, it may be the big end bearings have worn.
Replace them or not? Difficult question.

Replacing the big end (crankshaft/piston rod) bearings may stop the knocking/rumble noise. It depends on the crankshaft..

If the crankshaft has worn oval on its journals, fitting new bearings is unlikely to achieve anything as the bearings may break up due to the oval of the crankshaft. Removing the crankshaft and checking the journals for ovality/regrinding if necessary isn't a 5 minute job.

You say you have good oil pressure. That's a positive.

Personally, in your situation, I would try an engine oil additive that's designed to eliminate knock provided the main bearings haven't worn down to base metal. It's the cheapest option.

Failing that - and again, personally - I would remove the oil pan and fit new big end bearings in the hope that it would work.

The next step, if that doesn't work - would be to remove the crankshaft and have it reground and fit oversize bearings. Or get a 2nd hand engine...

You say the car was given to you for free .. you have nothing to lose. Try an additive first.. molyslip/molybdenum or whatever...

Good luck ...

May 21, 2016 | Cars & Trucks

4 Answers

How do you replace the oil pump on a 99 mercury cougar?

as mercury is ford it will be in the sump
only chev products have the pump outside the crankcase.

Apr 08, 2015 | 1999 Mercury Cougar

1 Answer

1KDFTV engine noise

  • Engine oil and filter have not been changed in a while
  • Engine oil is of insufficient quantity
  • Engine oil specification not suitable for climate condition.
  • Poor quality fuel
  • Diesel fuel filter is clogged, fuel pressure is inadequate.
  • Injectors are worn out or clogged
  • Injectors are tainted with carbon deposits
  • Injector compensation codes have not been registered on the ECU
  • Fuel rails are leaking
  • Timing belt has stretched, crankshaft and camshaft are out of sync
  • Camshaft sprocket is not aligned according to its peripheral stamp line
  • Alternator is not proving the car with enough electric power.
  • Rocker cover is not sealed perfectly, engine can't reach necessary vacuum (or pressure), manifold air pressure sensor isn't providing an accurate measurement
  • Air intake manifold, cylinder head and exhaust gas recirculation valve assembly are severely clogged up with thick coated oily carbon deposits. Air intake is impeded, exhaust recirculation valve is stuck closed
  • Injector washers are of the rubber variety and not of the highly recommended copper variety, resulting in engine "blow by" that leads to the next problem
  • Oil pickup mesh screen inside sump is clogged with carbon deposits, oil circulation within the engine is impeded. Injectors require washer replacement with the certified copper washer.This action will prevent "blow by" within the cylinder head.
  • Exhaust gas recirculation valve is not functioning properly. Check vacuum controller
  • Exhaust gas recirculation heat exchanger is clogged, it's preventing the passage of exchaust or preventing the passage of coolant
  • The engine has just been started, usually on a cold morning. The ECU is running a warm up cycle. Usually the engine runs fairly rough, though using SAE 40 instead of SAE 30 makes this warming up process less noisy

Crankshaft position sensor
This may be a common cause of misfiring. It may have been removed at some stage, the magnetic sensor will attract any metal filings or particles. A mechanic may have removed the sensor, reinstalling with small particles attached to its sensor head (the end that reads the sprocket location). The ECU then receives a less than perfect crankshaft position. Metal particles found clinging to this sensor should be removed, though its likely that the sensor would have lost some
degree of magnetism to the filings (giving a false reading) and be in need of replacement.

Reinstalling a new crankshaft position sensor
Make sure the hole that the sensor goes into is clean and free of dirt and it presses properly between the surfaces. Sometimes a new sensor has a slight imperfection on the moulded plastic, this prevents it from pressing up against its surface. Its easy to remove - just a thin bit of excess plastic.

Jan 22, 2014 | 2007 Toyota Tacoma

2 Answers

I hit a rock on the front end of my Subaru Legacy 1993. I pierced the oil pan, not much else has little scraps on it. i live no more than 10 miles away from where this happened so i put gum over the hole...

in the oil pan(sump) there is an oil pick up pipe and a filter on the end of it. The pan being damaged the oil pick up was probably bent and hitting on the big ends or the balance of the crank shaft. have the pan pulled and check for damage on the oil pipe and pick up filter. Replace the pipe and filter as they will be cracked or fractured and in future will break and the pump will run out of oil.==engine failure.

Jan 14, 2014 | 1993 Subaru Legacy

1 Answer

Passat 1.9 tdi 116 ch 2000 engine ticking/knocking noise

Are the pieces aluminium? Piston. Steel? rings/oil pump etc or white metal? big ends.

Apr 11, 2017 | Volkswagen Passat Cars & Trucks

1 Answer

I changed out the KA24E in my 96 Nissan 4x4 pickup. The bad engine in the truck had 3 keys that the 2 part harmonic balancer slides over. The engine that I got from a supplier had a one piece harmonic...

From the diagram in the service manual, it looks like the front of the crankshaft has two keys, in line with each other. Those two keys drive the crankshaft timing gear, the oil pump drive gear, the oil thrower (all inside the timing cover) and the crankshaft pulley (external). If your oil filter is dry, you're not pumping any oil. Pull the timing cover back off and see if the oil pump drive gear is correctly locked onto the key in the crankshaft.

Mar 28, 2017 | 1997 Nissan Pickup

1 Answer

I have a hyundai trajet 2.0 litres engine G4JP. the engine is a reconditioned engine and when i bought it, it had no oil. when we statrted it, it was running fine but the oil was not going up. the mechanic...

Sounds like the engine oil passages are plugged with sludge, you either have to dismantle the engine and have it boiled out or you can try getting another used one. By now you have damaged the engines main and crankshaft bearings running with no oil pressure destroys them very quickly.

Apr 20, 2012 | Hyundai Trajet Cars & Trucks

2 Answers

I have a 2002 ram 1500 with 4.7 magnum truck

There are several reasons why you would hear a loud knock from the engine, and the knock will usually be either in the top end or in the lower or bottom end of the engine.

The first thing that should be done is to drain the engine oil, and then pour the oil filter into a pan where you can see it, and if there is a lot of metal flakes, or a fine cloud of brass floating in the engine oil, you will not want to waste the time or the money trying to repair that engine by dropping the oil pan and replacing the piston rod bearings, it will only be a very temporary patch at best, that is if the patch even lasts for a day.

If you do find metal flakes in the engine oil and oil filter, the piston rod bearings will not be the only bearings in the engine that will need to be replaced, and the crankshaft main bearings can only be replaced by removing the engine and placing it upside-down on a good engine stand. The biggest problem would be that even if you did successfully replace the piston rod and crankshaft main bearings, it would only take one piece of metal flake that was left over in the engine block to find its way to one of your new bearings and then it will take no time at all before that engine will be right back where you started, and that is how important just the cleaning process is in repairing or replacing internal engine components.

If you do not find any metal in the engine oil or oil filter, then you should attempt to find the actual cause of the knock before you decide how to repair the engine, and you will have to remove the engine oil pan to inspect the rod bearings, and if you do remove the engine oil pan make sure that when you inspect the rod bearings that you only do so one at a time because you can not mix up the rod caps, and be very sure that when you remove a rod cap that you do replace it the same way that it came off, and if you turn around the rod cap and install it the wrong way or scratch the crankshaft bearing surface the rod bearing will fail.

If you can hear the knocking louder from under the vehicle then the most likely causes for a lower end engine knock are a damaged piston, worn out piston rod bearings, a broken piston rod, a broken flex-plate, and sometimes loose torque converter to flex-plate bolts, and the only parts that you can really check out without opening up the engine would be a broken flex-plate, or for any loose torque converter to flex-plate bolts.

If you can hear the knocking more from the top of the engine, then the most likely causes for an upper engine knock would be a faulty lifter, or broken rocker arm, or a broken valve spring allowing the valve to contact the piston, and it will require the removal of the valve covers and possibly the intake manifold to inspect for the problem.

If you have any doubts then it would be a good idea to consider a good used engine that you can hear run before you buy it, or a rebuilt engine for that vehicle.

I hope that this information will help you out and save you some time and a lot of money.

Jun 07, 2010 | 2001 Dodge Ram 1500 Truck 2WD

1 Answer

I own a ae92 corolla seca with the 4afc i was driving and the oil light comes on flashing what could this mean i added oil and it is still doing the same thing i think the car needs a tune as it has a flat...

Sir when the oil light flashes that’s not a good thing epically if you have a flat spot of it running take it to a shop and have them do a mechanical oil pressure test on the motor Should be minimum shop time 1 hour. Now it is not going to be good news but you may be lucky but be aware you could have damaged rod bearings or main bearings even a oil pump going out, but it did not damage the motor you be one lucky person. As far as the tune up don't waste the money unless you know the engine is ok. The mechanic can also let set for 30 minutes and take a sample of oil out of the oil pan and if there is metal flake in the oil your looking at a over haul of the engine. Do not try to just patch it together as you will find that you will just throw money away. If there is no metal in the oil then change out the oil pump and you can change oil and filter and see if you get lucky. The AE 4E engine or the AE 92 engine has the oil pump in the front on the crankshaft I do believe. I am explaining this so that you don't think the mechanic is trying to rip you off. Good luck and if you need more help please let me know by posting here.

Oct 10, 2009 | 2004 Toyota 4Runner

1 Answer

How hard to replace crank shaft

I hate to say this , but since metal shavings were found in the oil a total engine tear down is needed for proper cleaning and parts inspection/replacment in other words an engine rebuild also you need to know what caused the problem to begin with. but if you just want to replace the crank you will need to remove the engine and remove the oil pan to gain access to the crankshaft.

Apr 06, 2009 | 2001 Dodge Ram 1500 Truck 2WD

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