low oil pressure comes primarily from 3 things. bad sensor/gauge, clearances too high somewhere or weak pressure relief spring. items to verify: Check with a real gauge to validate. New oil pump or aftermarket "rebuilt"? there isn't really too much to rebuild on pumps so aftermarket usually just clean them. A real rebuilt pump would have the housing decked to .003-.004", the relief plunger hole checked for scoring and the relief spring checked for spec. Also check you reinstalled the head restrictor and torqued the cam caps down. If all checks out then add a couple of washers to the bottom of the relief spring to raise the pressure. If that doesn't work then the relief plunger may be stuck open. I chased low oil pressure for 3 years, tearing the engine apart twice, and it ultimately turned out to be the gauge in the dash. Pressure should be 30 at idle and 60 psi at speed.
Just rebuilt a 95 1.8 and we are getting what seems to be low oil pressure. At least to bottom end of the spec in the manual. Bearing clearances measure good, and has a new oil pump. I was wondering if anyone with a manual (real) oil pressure gauge typically gets at 3,4,5,6K. Also any ideas what would make the pressure low. Thanks in advance. **************Summer concert season is here! Find your favorite artists on tour at TourTracker.com. (http://www.tourtracker.com/?ncid=emlcntusmusi00000006)
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