Talyn
10+ Year Contributor
- 443
- 19
- Jun 10, 2012
-
Pittsburgh,
Pennsylvania
Long story short, I am rebuilding my engine(it was rebuilt before by a PO) reusing the .20 over ross pistons in a fresh block, but when cleaning them discovered that all 4 of them have valve contact marks. The indents are pretty minor and shallow, and I don't think the pistons will be unusable, but I am wondering what might have caused this? I haven't had a jumped timing belt or anything, and don't believe my valves are bent(will have to recheck after finding this, but the last time I had my head off they were good), also this is a 2g head with factory cams, springs, and afaik the valves too, on a 6 bolt block, I am wondering if there might be any kind of clearance issue using a 2g head on a 6 bolt block, or if that might explain why the contact marks are not inboard of where the reliefs are?