[cobrashoch]

Rings, Rings, Rings, check em'. Most home builds screw this one up. Many more things to look at than just gap. Molys should have polished walls, Iron rings cross/hatch and so on. I know this is hard, but if take out the slugs and it turns easy you have found the culprit. Some rings are designed to cut into the block too, and boy do they turn hard and break in slow. Just a lead.