Scored Main Cap Bearing - Ouch
Update, rod journals on 7/8 have been cleaned up with 400/600/1000. Journal on 3/4 looks good. It appears when they turned the crank they left sharp edges around the chamfer hole from the previous chamfers. You will see in some of the bearings a line where the chamfer hole is. I polished the edges of holes with 600 and 1000 and my finger like a debur tool. They are smooth now. The thrust bearing surfaces look good, no scoring. I am ready to pull 5/4 and 1/2 rods and take a look at them. If the filter and bottom of pan check out ok what do you think about putting new bearings and a seal and run it. At 50/100 miles pull the pan and see what it looks like. I already have the bearings and a spare mtr with forged pistons if this doesnt work out. Think its worth a try? For me a lot better than pulling the mtr. The really scored bearings are 7/8 and the rear main. The other rod bearings are 3/4. Journals are main #1, thrust, 7/8 rod and rear main. In case you are wondering here's what I am working on. I used some long Q-Tips and gently checked the oiling holes and they were clean.
Update, rod journals on 7/8 have been cleaned up with 400/600/1000. Journal on 3/4 looks good. It appears when they turned the crank they left sharp edges around the chamfer hole from the previous chamfers. You will see in some of the bearings a line where the chamfer hole is. I polished the edges of holes with 600 and 1000 and my finger like a debur tool. They are smooth now. The thrust bearing surfaces look good, no scoring. I am ready to pull 5/4 and 1/2 rods and take a look at them. If the filter and bottom of pan check out ok what do you think about putting new bearings and a seal and run it. At 50/100 miles pull the pan and see what it looks like. I already have the bearings and a spare mtr with forged pistons if this doesnt work out. Think its worth a try? For me a lot better than pulling the mtr. The really scored bearings are 7/8 and the rear main. The other rod bearings are 3/4. Journals are main #1, thrust, 7/8 rod and rear main. In case you are wondering here's what I am working on. I used some long Q-Tips and gently checked the oiling holes and they were clean.
