@tomkuester posted:I have not changed oil type or viscosity, and change the oil at least once a year. The motor uses almost no oil, except for a very annoying minor leak near the front seal that I aim to fix this winter. The motor was rebuilt about 20 years ago and has about 15000 miles les on it since then. The puzzling thing is that the pressure creeped up about 15 pounds over the last three years.
has anybody changed the oil pump without pulling the motor? Possibly the pressure relief valve is sticking.
You can change the oil pump without pulling the motor. The oil pan will have to be dropped. If your car has the removable crossmember then it is less of an effort. If the original crossmember is still there then it is a project to convert it to a removal unit. Chopping out the crossmember is easier if your oil pan is stock. It was somewhat of a challenge with my 10 quart aluminum oil pan. I also had to remove the parking brake mount to get my oil pan out. Once the oil pan is out the oil pump is readily accessible.