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Old 06-17-2013, 08:23 AM   #3
disston's Avatar
Joined: Mar 2011
Location: Silver Spring, Md
Oddometer: 9,960
The problem does not have to be the O-ring. But to begin with that since it was something you last touched, are you sure it was the oil pump O-ring you installed? The is another O-ring that is very close. I think it's the cylinder base O-ring but it might be the flywheel spacer O-ring. One of them is sometimes mistaken for the oil pump O-ring.

I don't think you should start there. How about the oil pressure regulating valve, This is part of the front bearing holder that is under the timing chain crank sprocket. A broken spring in this will cause oil pressure problems. You have to remove the timing cover to look at it. They do go bad.

There is also a bypass valve in the oil filter canister area. It is at the back of where the filter is. Remove filter and look at the back, you should see a ball check valve. Is the ball in place? Can you push it in a tiny amount with a skinny screwdriver and it pops back out into place?
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disston screwed with this post 06-17-2013 at 08:29 AM
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