View single post by Mark Rosenbaum
 Posted: 01-18-2006 05:43 am
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Mark Rosenbaum



Joined: 03-12-2005
Location: Kingman, Arizona USA
Posts: 532
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 If it did this once only, then it was probably a momentary sticking of the oil pressure relief valve, or debris partially blocking the passage to the oil gauge pipe, or something similar.  Here, I wouldn't worry about it, particularly if it never happened again.   

If it did it repeatedly, with the lower pressure at lower engine rpm, and the higher pressure at the higher rpm, I'd think it normal behavior and wouldn't worry about it.

If it did it repeatedly, at a constant engine rpm, I'd be concerned about a sticking oil pressure relief valve, or excess end play in the oil pump rotors causing the pump to repeatedly lose then recover its prime.  Here, I'd slip off the timing belt and verify the end play of the aux. gear, and if it was out of spec would rebuild the oil pump.  But if the end play were in spec, I'd drive the car but watch the pressure very carefully.