How can you tell a worn lifter ?
10-09-2007, 12:43 PM
#1
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How can you tell a worn lifter ?
Hello,
I was wondering how one can tell if a lifter (tappet) is worn.
My car rattles alot, not only on start up, but also constantly even when the engine is warm
What is an oil check or oil control valve ? I heard that it gets blocked and could cause problematic oilin of the lifters
Any advice would be greatly appreciated
I was wondering how one can tell if a lifter (tappet) is worn.
My car rattles alot, not only on start up, but also constantly even when the engine is warm
What is an oil check or oil control valve ? I heard that it gets blocked and could cause problematic oilin of the lifters
Any advice would be greatly appreciated
10-09-2007, 01:21 PM
#2
A worn lifter will usually be evident upon start up. A lound ticking sound that is slow enough so you can count the ticks at idle (but is rpm related). If it goes away after several seconds, it's probably O.K. Is the car rattle most obious at idle? If so, it could very well be your engine mounts need replacing. The engine mounts have an internal hydralic damper that cuts a lot of vibration from reaching the chassis.
10-10-2007, 02:36 AM
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The noise is revs dependent. It increases with speed. Today we are opening the cam covers. Are there any visual hints i should look for ? How does a worn lifter look ? Should there be excessive play ?
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10-10-2007, 08:28 AM
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Not true. If the center puck moves it means the follower has drained out the oil. I have 8 new ones and all are free to push in. The bad ones will hang up and not move in/out as designed. If you cannot push the puck in it does not mean it is a bad one, it may not have drained out so the pressure is still there. A bad follower is more from the face getting worn into a concave pattern vs pure flat new.
If the center puck was not designed to move there would not be a spring under it and it would then be a solid lifter, the spring needs to travel. Think of the lifter as a oil filled shock(spring).
On first start up after a replacement/removal and drainage the lifters will click for as much as a half hour or more until the pressure builds up and feeds the oil through the little port hole.
Poor oil pressure can affect the lifters in this way too.
Last edited by dgz924s; 10-10-2007 at 08:31 AM. Reason: add
