strutaeng
Full Access Member
Yeah, I had never heard of replacing the oil pump would damage the engine either.
I think course of action would have been determine if the oil sender was the issue first, but I guess the shop was addressing the rear main seal and had already torn it down for that.
I pulled the engine on my 06 Suburban a few months ago for a refresh. I removed the oil pump to inspect it and it was in pristine condition, so I put it back together and reinstalled it. The truck had 260k and the pressure on the engine is good. I did replace all bearings which had marginal wear. The bearings are the ones that are usually the cause of low oil pressure.
These gerotor pumps on these engines don't really wear out much unless debris runs through the oil. I have read replacing a pump with a high volume (or high pressure?) does increase the oil pressure if the engine is worn and has oil pressure issues. I have not done that myself.
Checking oil pressure with a mechanical guage is the best way to determine the actual pressure.
I think course of action would have been determine if the oil sender was the issue first, but I guess the shop was addressing the rear main seal and had already torn it down for that.
I pulled the engine on my 06 Suburban a few months ago for a refresh. I removed the oil pump to inspect it and it was in pristine condition, so I put it back together and reinstalled it. The truck had 260k and the pressure on the engine is good. I did replace all bearings which had marginal wear. The bearings are the ones that are usually the cause of low oil pressure.
These gerotor pumps on these engines don't really wear out much unless debris runs through the oil. I have read replacing a pump with a high volume (or high pressure?) does increase the oil pressure if the engine is worn and has oil pressure issues. I have not done that myself.
Checking oil pressure with a mechanical guage is the best way to determine the actual pressure.
