So yesterday I pulled the rear main cap to do a "sneaky pete" rear seal install. When I pulled the cap and looked at the crank journal I was just not happy. See pics. I decided to pull all of the caps. Only the rear main bearing was like this. The rest were shiny and smooth. I measured the rear bearing surface on the crank in the block (Used a decent vernier caliper, not ideal. I get it) and it measured very close to spec. Not sure if I was in a high spot or in a groove. Don't remember the numbers but I'm not sure what I had for breakfast.
Seems the crank needs a grind. Didn't pull the rod caps yet so nothing there. While I know this is a problem, what would cause just the rear bearing to wear like this? So exciting, can't wait until tomorrow... Thanks!
Oh, and note that the bearing material squeezed (?) out in one of the pics.
