Can someone please confirm the headbolts on my '73 455 do not penetrate the water jacket at any location? I have lamped the holes, and see no indication, but the set of "C" heads I bought to replace my smoggers had remnants of the white, teflon-type sealant in the holes. It's my first rebuild, and I am a little concerned with what I saw. Thanks.

 

Someone else added the sealant. The factory oiled the bolts. No head bolt goes into water.

 

I was hoping someone would say that.Thanks Run!

 

Since header bolts are notorious for loosening, I'll bet that what you saw was some sort of thread locking compound - undoubtedly baked white by the heat.

 

He is talking "HEAD" bolts not header bolts
Gene