Posted by IndianaRed on August 20, 2011 at 13:41:20 from (75.46.75.94):
I've been having some oil pressure issues, 4.8 Chevy, and I think it may just be the oil bypass valve needing cleaned/replaced.
I've posted about this a few weeks ago. What makes me think it might be valave related is that I don't get any lifter noise at start, but after about 20 minutes of driving, about when that valve should be closing and sending oil through the filter. Just saw a picture of one and those holes are pretty darned small. I'm thinking mines gunked up.
I have a Chiltons manual for my truck, but it doesn't even list this valve in the index. Done some searching and can't find any info for my particular unit. I just want to get mine out to see if it's gunked.
I pulled my filter, but don't see any bolts holding the filter mount on. Looks like maybe the bolts that hold the oil lines to the side of the filter mount might hold that in place?
Any help is appreciated. And I've now passed 500k miles.
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