66dartvert

what exhaust bolts do I need to put sealant on is it all of them or is it just the end ones. I already installed my headers but forgot to put sealant on the bolts. I have not put water in the motor or fired it yet if it's just the end ones I may not have to ruin the gasket. But I used the TTI headers and I have to take most of the bolts out to get the one that hides behind a tube. Thank you in advance

78trailduster

you need to put sealer on them. All B/RB heads have water jackets that the exhaust bolts screw into. I used aviation #3 permatex and the havent leaked so far. Make sure you run a tap down the holes to clean all the rust out. Spray Brake Clean down all the wholes and blow them out real well so they are dry and make sure you let that permatex set up for at least 24-48 hrs before any coolant comes in contact or they will leak and you will have coolant coming out your exhaust Good Luck

66dartvert

Hey thanks guys I did all of them I used rtv black silicone. I did it before I read the last post I used to use aviation sealer and even had some on the shelf but chose the silicone instead I hope it does the job. I used to know this stuff but I have been away from older Mopars for around 20 years now and forgot alot of this stuff. Thanks again

MrMopowered

Yeah man seal 'em up. Haha. My dad and I had a funny experience with this changing a starter on my car. We had to unbolt the headers to uncapture the damn thing, which let loose a torrent of coolant all over the garage floor. Lying underneath, we exchange the "OH S@#T!" look for a second- normally that would mean your motor is screwed when that much coolant is flowing out of that particular area. It was only after I glanced up, making the connection between the water jacket and the bolt hole that we figured it out. Neither of us had ever done any serious work on a big block before- all smallblocks.