lifter knock - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 02-15-2004, 03:39 AM   #1
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how bad can a minor lifter knock be or turn into?
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Old 02-15-2004, 07:14 AM   #2
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it can be a number of reasons for it to tap. i bad rocker arm, worn pushrod. plugged pushrod, or even in some cases, a lifter that went bad and wore a hole in the cam/ i have seem this on a Gm 2.2L in a cavalier. if its just one tapping, i would check those areas/ if its more than one tapping, it may be an oil pump issue or worse yet, an oil flow issue, where the oil passages to the lifters are plugged
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Old 02-15-2004, 12:03 PM   #3
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all it is a small ticking. im not worried or anything cuz it doesnt sound that bad ive heard other car with worse and they keep going and going. im just wonder if it will get worse and is it easy to fix.
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Old 02-15-2004, 12:05 PM   #4
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Don't fuel injectors make loud ticks once in a while?
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Old 02-18-2004, 07:08 PM   #5
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The series 1 have a tendancy to make a lot of clatter when its cold, but I have had an actual ticking before and feul injector cleaner took care of it.
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Old 02-18-2004, 09:06 PM   #6
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If a lifter sticks bad enough long enough the valve can take a beating leading to worse problems.Cleanliness is the key.Frequent oil changes and maintain the PCV/breathing system.I don't know the state of your engine or your maintenance schedule but I'd suggest using a good quality oil with a robust additive package that also cleans well.Pennzoil is one that fills the bill.It has good low temperature pumpability in the 10w30 grade and should work well for you in the winter as well as summer.Yeah,I know it gets cold in GR in the winter.In the past I've had good luck with Marvel Mystery oil freeing up stuck lifters.Added a pint to the crankcase and just drove it.But I was running at least 10w30 if not 10w40.This stuff is a solvent and will thin the hell out of a 5w30 .Especially in hot weather.But then again 5w30'* seem to thin out of grade rather quickly(Valvoline 5w30 has to be some of the worst) and I'd guess you run 10w30 in the winter and maybe something heavier in the warm weather considering the mileage on your engine.
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