Hello, this is my first post. New to the forum obviously, and think I have a unique issue, but if it's been discussed before, please let me know. My son bought a 1962 CJ5 recently, with the 134 F-head, and we're going through it, fixing things we knew about, and finding a lot of things we didn't know about. I'm an industrial electrician by trade, and although I've done some of my own auto repairs over the years, I am no auto mechanic! Been figuring out a lot by doing, and it's been a great learning experience for my 19-year-old, but we ran into something today that I'm not sure what would be the best way to handle. Three of the exhaust manifold bolts were broken off in the block, so I tried to get them out, but finally had to end up center punching them and drilling them out a little at a time until I could finally get the old bolt threads peeled out, and then chased the threads, which are 3/8-16. They are good to go now with one exception. One of them goes all the way through into the block, into what I believe is just the coolant cavity around the cylinders. One of the other exhaust manifold bolts that I didn't have to drill out, is also all the way through into the block. The others bottom out before that point. So I'm wondering if that is the coolant cavity, am I going to have coolant leak issues now? Was planning on putting some type of thread locker on them anyway, probably red RTV, since it's a high temp area... just hope I never have to get them back out. Also, another issue which is down on the valve cover, the bolt on the left that goes through the ventilator... when I removed this bolt to remove the valve cover, coolant is leaking out of this threaded hole as well (just residual coolant, as we've removed the radiator at this point). I'm also feeling like this hole should not have been all the way through either. Someone had tried to glob a bunch of blue RTV in that threaded hole, but his engine oil is milky white so obviously coolant is getting in. We've got the head pulled, and although we're going to replace the head gasket now, I don't believe it was allowing the coolant to enter. Sorry for the long winded post... but is this making any sense? I can post pics tomorrow if needed. Just for the record, this thing ran fine when we drove it home, of course it was louder than normal since the exhaust manifold was hanging off of it, and the death wobble is horrendous (which we're in the process of addressing). I'm considering injecting a small amount of JB Weld into these open holes to close them off from the block, then re-drilling and tapping if needs be... unless ya'll feel like the issue can be resolved simply with some kind of thread sealant. Any help would be greatly appreciated. Thanks.