[jim1fun1]

At sometime in the past I read about painting the inside of the block and oil gallery of the heads with Rustoleum primer to aide in the return of oil to the sump. Now I'm worried it might eventually loosen up and clog my oil intake screen or prevent heat transfer to the coolant passages and contribute to overheating. Does anyone know for sure about these issues. Thanks!!!!

[DoubleVision]

Yeah, don't paint it, it does no good and does nothing for performance. If you've aready painted it, then remove it.

[oldbogie]

Originally Posted by jim1fun1

At sometime in the past I read about painting the inside of the block and oil gallery of the heads with Rustoleum primer to aide in the return of oil to the sump. Now I'm worried it might eventually loosen up and clog my oil intake screen or prevent heat transfer to the coolant passages and contribute to overheating. Does anyone know for sure about these issues. Thanks!!!!

X2 on DoubleVision. I know it's hard to tell a hot rodder "if it ain't broke, don't fix it" but this is one of those cases where this is a useless exercise in terms of what this is sold to do. The oil drains back just fine, thank you very much Gravity.

Your worry about paint getting loose is justified, it can and does happen. It's a quirk when a failure happens but it's one of those things where the probability of failure is low but the consequence of such a failure is high. So just don't do it and the potential of a problem just isn't there to happen.

Unless you're building a race engine, getting oil back to the pan just isn't a problem. If it is in your race engine, you should of built a dry sump engine.

Bogie