Goose
Well-known Member
Ten days or so ago, I posted about oil pressure going away on one of my H's when it warmed up.
I dropped the pan, plastigauaged the bearings, and found them to be within spec. I then turned to the oil pump. The cover plate didn't show any wear, but I clamped both the main body and the cover plate in a vise and drew a flat file over them. I was surprised at the high and low spots. I went over both with the flat file until there were no high and low spots. Then when I reassembled it, I put a couple of flat washers under the spring in the relief valve. I put the pump back in and the pan back on last week, but never had a chance to run it for long.
Today I ran it for at least a half hour and the oil pressure stayed around mid gauge the whole time. So-it looks like the pump was the problem.
I dropped the pan, plastigauaged the bearings, and found them to be within spec. I then turned to the oil pump. The cover plate didn't show any wear, but I clamped both the main body and the cover plate in a vise and drew a flat file over them. I was surprised at the high and low spots. I went over both with the flat file until there were no high and low spots. Then when I reassembled it, I put a couple of flat washers under the spring in the relief valve. I put the pump back in and the pan back on last week, but never had a chance to run it for long.
Today I ran it for at least a half hour and the oil pressure stayed around mid gauge the whole time. So-it looks like the pump was the problem.
