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Originally Posted by GTP Dad
How many miles are on this vehicle. This actually sounds to me like you are having problems with the oil not draining back in to the pan from the upper parts of the engine. It can be caused by blocked oil drain holes due to sludge build-up. I only say this because the oil is low enough to allow the pressure to drop to a point where the lifters are tapping. You may want to pull a valve cover to see if there is a build up of sludge in the engine. By the way, did you ever use Prolog oil additive?
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i was actually told today that it most likely was the oil pressure...due to build up..they said to get b12 chemtool and flush it and change the oil and yes the excess was drained however doing the full oil change and filter change tomorrow on it...i was told that the chemtool may not work and if not i'll need to remove the cover and clean out the ports..they they were prob. built up...thanks for all the great advice..sounds like it is as we thought pretty simple to repair