10 replies to this topic

[sasso C70]

I know my car always had noisy lifters but it could only be heard at idle when the engine was cold. Now, they have got really bad they click very loud across the whole RPM range, even when revving at idle they get very loud. My local engine builder is gonna fix these in the next week or so.

Does he have to remove the whole head from the vehicle to do this or just the cams?

Thanks
Sean.

Edited by sasso C70, 19 March 2005 - 03:09 PM.

[A pimp named Slickback]

Are you sure it's the lifters? It could be the oil pick up tube o-rings. Sounds almost exactly the same.

[Bay13]

is your local engine builder a Volvo specific repair shop or just engines? Swedespeed21 has a point, before busting the carrier plate off the top of the head and replacing all 20 hydraulic lifters, you might consider having the oil pan dropped and all of the "O" rings replaced.

[sasso C70]

is your local engine builder a Volvo specific repair shop or just engines?  Swedespeed21 has a point, before busting the carrier plate off the top of the head and replacing all 20 hydraulic lifters, you might consider having the oil pan dropped and all of the "O" rings replaced.

O-rings in the oil pan were replaced by Volvo due to an oil pressure problem (way too low) about 15 thousand KM ago. I no longer have the pressure drop and the car has been fine until a week ago once this ticking started. The tick had just started after a massive oil leak that caused the engine to run for about 50 seconds with no oil in it.

[Bay13]

Your car should have solid lifters, so they shouldn't have the hydraulic problem that the pre 1999s have. Did they say what they were going to do to fix the ticking noise?

[MrWinkey]

OH MY

[sasso C70]

The oil pan o-ring job may have been completed incorrectly. The suction side oil pump o-ring may still be leaking. What exactly happened to cause the engine to have a massive oil leak? Was the engine at idle during the 50 seconds of no oil in the crankcase? Was the vehicle under load i.e. driving on the highway? How many miles/km are currently on the car? Low oil pressure can be caused by leaking o- rings, cracked oil pick up tube, worn engine bearings, or a worn oil pump. FYI the lifters are at the end of the oiling circuit.

An oil hose was punctured and burst, it was at idle and not under any load for less than 50 seconds. There are 222,000 KM currently on the vehicle. It doesn't seem to have a oil pressure problem ever since I had the dealer replace the O-rings, it's just this ticking ever since it ran with no oil.

What tests should I perform to figure out the problem?

-Test oil pressure
-Test compression

[starfish]

An internal leak on the suction side of the oil pump will make the oil foam. Air mixed with oil can create a noise coming from the connecting rod bearings. The rod bearings require a full film of oil between them and the crankshaft. If air is mixed with the oil and creates foam, this oil film cushion will be broken down allowing the bearing to intermittantly contact the crankshaft that can create a noise very similar to a worn valve tappets.

You can check the oil pressure and it will test good if there is no leak on the pressure side because that is the side that is only being tested. If the oil pump suction/pick up side has a small leak where air is being drawn in too, I doubt that you will see any major difference in pressure reading. But, the foam created by that condition may be responsible for your problem.

You may try and disconnect a coil or injector on a cylinder as the engine is running and see if it makes a difference in the sound. If the noise lessens as the load is taken off the work of the connecting rod bearing you need to look into an oiling problem. If the noise continues then look into the tappets.

At this point if you just can't pinpoint the cause you need to make a choice. You may want to start with the removal of the oil pan first and recheck all o-rings and then remove and check the connecting rod bearings first before removing the cylinder head cover plate to test for worn tappets. Good luck.

[Tom]

I agree with Starfish's recommendation: If it's run at all without oil, the first thing to work out is whether you have a rod knock and associated damage to the rod bearings. If you do, then rebuilding may not be best option.

Tom

[mykidsarebrats123]

Try a bottle of valve kleen from napa, could be a clogged oil passage.
$1.98