Quote:
Originally Posted by mueller944s2
The story was I was doing a lot of long distance driving and at a stoplight (luckily next to my house) it started making a knocking noise and the oil pressure dropped to 1. I towed it home and found the oil was really low. I check it persistantly but this was weird, it never drinks that much. I pulled off the belt cover and everything is good in there. Pulled off the valve cover and chain tensioner and valve springs are good. Changed the oil and there was a tiny bit of copper at the bottom, but not much at all (bearings). I was told a lifter might've collapsed so I ran it for 5 minutes and the knocking got a little better but not much. The oil pressure cold is 4 which is lower than normal and I was also told that the relief valve might be stuck which would cause the low oil pressure and keep a lifter from getting enough oil. Using a stethoscope I can't hear anything inside the engine, and the sound is coming from the head area.
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Oil pressure dropping to 1 could have been just the engine almost stalling for any number of reasons, no?
But you have to find your missing oil. How low was it? I think you should look for it in the coolant (milkshake).
I think the OPRV ordinarily fails to high pressure (anyone confirm?). It's next to the oil pressure sender and uses a 24mm socket. You'll need a new crush washer for it if you remove it, and I'd replace the two o-rings as long as it is out. Of course if you have oil in your coolant, you'll be resealing the oil cooler and its housing...