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mikeyss
Full Access Member
I got the front of the engine pulled apart, but not the oil pan yet. I can't remove the oil pump yet because of the pick up tube bolt, but I wanted to make sure I'm having pump issues so I pulled the pump cover. With my pick, I felt the relief valve open and there are scoring marks on the gear and the cover.
When I pulled the cover, the gear seemed stuck to it and I had to knock it free.
When I pulled the cover, the gear seemed stuck to it and I had to knock it free.
Tonyrodz
Resident Resident
So what do you think it could be.?
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mikeyss
Full Access Member
I think I got a bad oil pump. When I was building this engine, I ordered things from rockauto, but at the time I didn't pay attention to their 'gold' line and thought I bought genuine GM parts. I'm thinking I bought an inferior pump.
Tonyrodz
Resident Resident
Curious now. I stated I also had a similar issue with my 4.8 Express van. I had a Melling HV pump installed. So you think it mightve not been pumping oil to the top end? Or at all(yours)? Strange there wasn't any knocking coming from it......Still going to pull your oil pan?
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mikeyss
Full Access Member
Yeah, I'm going to pull the pan for sure. I'm almost certain it's the oil pump, because the last test I did was put a new empty oil filter on and started the engine. The new oil filter didn't get a drop of oil in it, and that's why I believe the pump is at fault. The pan will be pulled off this week, but I'm not as young as I used to be, so it takes me longer. This just gives me a reason to drive the G8 more
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