Posted by labman98 on September 22, 2012 at 18:25:19 from (22.214.171.124):
Looking thru the many previous threads on this subject I have not found an "fix" so I am going to ask this question again and hope to get some sort of answer. Just finished putting an 8n back together and went to start it and at start get 20-25psi and once it warms up goes down to 5ish. I added new rod bearings, main bearings, sleeves, pistons, rings, but nothing with the oil pump itself. Mains have .002 clearnace, rods have .004. Rods are a little high but still within max allowance (.005) I dropped the pan this morning and took the oil pump out. The gears are a little pitted but not to bad. The shaft and bushing are tight and measure to spec. One thing I cannot find a spec on is the gear to removable plate clearance. There is some wear on this plate and I will clean that up before it goes back together. Is there a spec for this? Or gaskets to adjust this clearnace? I have seen this on cars and it helps greatly to tighten this up with thinner gaskets. Any ideas on where else to look?
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