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OP
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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
adventurenali92
Full Access Member
Well dang….. just getting caught up…. Hopefully the oil issue is just the pump!! She looks good though with the headlights…. I like em!
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mikeyss
Full Access Member
I put the new pump on, and got everything cleaned up to put this all back together this week. I've been sifting through the oil, and so far I've only come across 2 small pieces of metal, but it looks like it came from the oil pump. Here's some random pics
Tonyrodz
Resident Resident
So, in your opinion the oil pump was the cause of the issue? If so, that's probably what caused the same issue in my Express van. Still strange there was no tapping.
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