engine bolt leak

[jim conway]

 I have intake manifold bolts to aluminum heads leaking oil l/s on my 440 . Any ideas what the problem might be  ? Thank you

[b5blue]

Use Permatex Aviation Form-A-Gasket on the threads.

[Kern Dog]

All intake bolts need some sort of non hardening sealant.

[John_Kunkel]

The underlying problem is crankcase pressure pushing the oil past the bolt threads. Do you have a functioning PCV valve? An engine with a good crankcase vacuum system won't have that problem.

[b5blue]

This may help:  https://mewagner.com/?p=444