Quote:
Originally Posted by ForcedInduction
Sounds like the guy you talked to is on the right trail. If you don't have a big leak or high consumption then there is something blocking the oil flow or leaking back the the sump before the filter.
Pull the valve cover and be sure the oil rail is spraying on the cam lobes and not cracked/broken. If that is good then its time to drop the lower oil pan and have a look at the pump, relief valve and shaft bushings.
|
Aren't the relief valve and the bypass valve both built in to the bottom of the filter housing? Mine doesn't have an oil cooler, so there are no outlets for that ... otherwise it looked like late (83-85?) filter housings for 616-617 are the same. Has anybody ever fiddled with these? I'll definitely check the rail in the valve train. I also think I'll tap the filter housing with a rubber hammer & see if the relief valve will unstick.
I don't mind replacing the oil pump ...... but it doesn't seem logical that it pumped fine one day, and much lower the next. It seems more likely that some restriction that used to help build and hold pressure isn't doing so any more.