Quote Originally Posted by renegade master View Post
we i've never replaced head bolts (and i've reused a few with no issues) unless i destroyed them taking them off with an angle grinder etc, but i've just always thought that they were single use items cos they stretch or something.
Some bolts are single use. Not uncommon to find mains and big end bolts are single use. Usually when a bolt is single use the manual will state this.
I've not found a head bolt yet listed as single use, though some call for taking measurements and discarding of outside of various parameters.