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EJ-22 Low oil pressure at idle only
Posted 05 December 2012 - 12:48 AM
With the oil at operating temp, I measured 9-10 psi at 700rpm idle, 22-23 psi at 1500rpm, 30 psi at 2000 rpm, and about 40 psi at 2500. Not sure how accurate the mechanical gauge is, but I was hoping it was better than the electric one.
With good pressure at higher RPM, am I correct to assume that the low psi at idle is probably due to normal wear in the engine at this mileage? The oil pump is original, never replaced or serviced. I've been running 10W-30 since I bought the car at 110K, should I run something thicker? Or is this psi reasonable for the engine given it's age? Any thoughts you guys have would be awesome, thanks in advance.
Posted 05 December 2012 - 06:42 AM
Posted 05 December 2012 - 10:58 AM
Posted 05 December 2012 - 12:57 PM
Posted 05 December 2012 - 11:50 PM
There is an issue with the back plate on the oil pump coming loose sometimes. The screws that hold it on loosen and it lets oil pressure bleed off back into the crankcase. Doesn't sound like that's an issue in your case, but its worth checking at your next timing belt change.
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