boondocker

I'm second guessing the sealant I used on my valley pan, i'm hearing of coolant leaks from improper sealing of these gaskets. I used Permatex High Tack Sealant sprayed on both sides of valley pan...any issues or should I remove the manifold and redo with RTV type sealant?

nofiveo

High tack is normally pretty good stuff... I'd pressure test the cooling system to make sure it's sealed and if it's all good, drive it.

oldcutlass

Are you having any issues?? Generally sealants are for added insurance, if no issues then no worries.

boondocker

The engine is still on the stand, I've read some threads about valley pan propensity to leak when not properly sealed...first build jitters is all.

jensenracing77

i would have used RTV around the water ports.

Chesrown 67 OAI

if ist a stock motor that doesnt have a lot of milling done to the block and/or heads you will be fine using the hi-tack! The seal is no different than with a steel shim head gasket and hi-tack is fine for those!! (MOO)!