AJ1978TA

I've got 95,000 miles on my ls1, and since I've owned it from about 80,000, the oil pump was LOW but safe, running around 40 psi, 30 off idle. I would lose about 1 qt of oil for every oil change (at the end of 3000 I would be a LITTLE low, but no biggie for this mileage), so overall no burning or consumption issues. A few weeks ago, my psi is now 20-25 off idle when hot, and can't break 30-35 when running. Now, I notice that I lose 1 qt of oil every week. Is this possibly because of my low oil psi, creating high internal temps and possibly burning more oil within? I am going to sell the car in spring, or fix this problem now, but I am not 100% sure if a new pump will fix the problem with oil loss. I see no leaks, no smoke on startup or running.........If I knew that I didn't cause any damage to my engine, I would just get the pump and drive it..........but now I'm considering selling the car as is because I will probably get rid of it anyways. Any ideas? Are these 2 issues related? Thanks guys.

Mike94ZLT1

I think you should replace the pump, you probably wont get much for that car with oil pressure problems.

AJ1978TA

I can say the GM manual claims 20 psi is safe....Which it does...

mebanditws6

Replace the pump. I drove a 98 with 80k at a small used car dealership, and it did the same thing as yours. Mine gets about 40 at hot idle, 60 cruising, and 70 at WOT.

Jason

AJ1978TA

Just ordered a "modified" ls6 pump from thunder racing, on sale today. Such a BITCH job to do though, I thought I could just drop the pan... then I saw a how to guide and it's too much crap for me to handle.........should've known better.


My only concern now is if it will still consume 1 qt a week on me.......it never did till the psi dropped even more........eh we will see.