Question about Cars & Trucks
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Posted on Jan 02, 2017
the lifter noise might have been a bearing going bad or a piston ring. if you lost power you probably lost compression on one cylinder. Try checking your compression with a compression tester screwed into your spark plug socket. here is a site with a procedure.
Posted on May 18, 2009
SOURCE: lifter making noise
The hydraulic lifters depend on small channels that can get clogged. Had lifters replaced and tap remained. Decided not to spend hundreds more once audi mechanic discovered the fix (reopen head and **** oil channel). Changing oil and filter frequently helps quiet the lifter.
Posted on Jul 31, 2009
You usually don't need to pull the heads. I'm not exactly familiar with that engine but 50% of the time you can get a magnet and pull them out through the valve covers. But to make sure it's the lifters. Let it run until it's warm and remove the valve covers. You at that point should push with your finger on the push rod side of the tappet. If one of them ticks (you will be amazed you just did it with your finger) thats the bad one. However the whole cause of the problem with hydraulic lifter is oil pressure. The 0-ring seal between the oil pump screen and the oil pump may be cut, causing aeration of the oil. Thus lowering oil pressure causing the tick. It is normal for some LIGHT ticking to occur in the 4.8L and some noticeably louder ticking on startup. Good luck!
Posted on Jun 28, 2010
SOURCE: Loud lifter noise
Over time and miles the lifters tend to collapse and the only way to quiet the noise is to replace them or use something like lucas to try to keep the pressure up in the lifters. If you did replace the lifters it would help with performance because when the lifters start to collapse the valves do not open all of the way. Hope this helps!
Posted on Jul 30, 2010
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