[joes455]

It's the antifreeze that eats epoxy

[GTO-relic]

Originally Posted by joes455

It's the antifreeze that eats epoxy

epoxy should never be used against a water jacket or in an exhaust port, period.
it won't hold up.
only for pushrod guide holes, head bolt holes, or breakthroughs into crankcase pressure area. it'll seal vacuum, atmospheric pressure. that's about it.
a simple head bolt hole break, you could seal it with even permatex if you wanted to.

[Dave Polichena]

Originally Posted by GTO-relic

epoxy should never be used against a water jacket or in an exhaust port, period.
it won't hold up.
only for pushrod guide holes, head bolt holes, or breakthroughs into crankcase pressure area. it'll seal vacuum, atmospheric pressure. that's about it.
a simple head bolt hole break, you could seal it with even permatex if you wanted to.

I have used Splash Zone Epoxy for years in my intake ports to prevent water/coolant leaking, there is plenty of pressure trying to pop through in my "Sprinkler Heads".