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Old 07-30-2013, 04:56 PM
LEW LEW is offline
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Join Date: Jan 2011
Location: Mechanicsville, Va
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Vehicle: 2002 Ram 1500 Quadcab 4X4
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If the "tapping" goes away after a few minutes, it's probably a lifter pumping up. If one of the cylinders is 0 psi compression, there must be a sizable leak on that cylinder. Seems like most of your engine problems were in the heads when you got the truck. Were the affected valve(s) reused, replaced or repaired (I'm not a mechanic, but repairing sounds risky depending on the extent of any damage)? Could be a valve(s) was damaged and not repaired correctly (maybe the stem is bent?) or the valve seat(s) was improperly repaired. The head itself could be damaged or the head gasket. Some BIG leak somewhere.

I guess it's possible enough of the compression rings could be damaged, but I'd focus on the head first.

If you're saying the other readings are 60-80 psi, that sounds LOW to me.

Last edited by LEW; 07-30-2013 at 04:58 PM. Reason: changed a word
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