Originally Posted by SpeedRacer350
So, coolant is somehow leaking past the bolts. I know the holes are blind, so it must be seeping past the gasket. If so, I guess I'll try some Right Stuff sealant on another gasket and see if that does the trick. What do you all think?
If the holes are blind, they'd be unusual. Most go through into the water passage. I'd put thread sealant on the bolts, and also make sure intake and housing surfaces have sealant on both sides of the thermostat gasket.