hi, i have a 72 barracuda with a 440 in it.car isjust a beater that i was trying to get on the road.it had a broken valve cover bolt towardsthe front of head near power steering pump which is on driver side.anyway i was drilling busted bolt out and doing well,until the idiot that i am went to deep and punctured water jacket.can i pour a jb weld type product in hole that id rilled to prevent water from comming upor do i have to remove head and get repaired.there is a freeze plug at the front of head that i can remove to maybe use the jb weld were the drill bit went through.thanks for any helpand happy holidays

Can you tap it oversize and use sealant on the threads on the bolt or stud. Some of the exh. studs go into the water jacket. Or you could use a heilcoil.

OK, since were drilling in the threaded blind hole, and accidentally made it a through hole, the easiest fix would be to continue what your were going to do to repair the threads--I would use a threadsert if there's enough meat around the hole, helicoil with epoxy (to aid sealing)if there is not. Then insert a 1/4" stud, WITH epoxy or thread sealant. call it done

if i tap it complete and screw a stud in it with some type of sealant will the water make it up and of stud,thanks

Your fix will work. I had water leaking around a valve cover bolt on a 440 restoration job. I tapped the hole a little deeper, put a set screw in with sealer on it, and that way I was able to put a bolt in it, and it never leaked water when I took the bolt back out agai8n.

thanks for the help i thought i was going to have a bad vacation,now it seems like ill be ok,thanks again