Header bolts keep popping off
03-11-2012, 11:44 AM
#1
Header bolts keep popping off so I've been using the same headers for over 6 yrs now. i did a H/C swap and kept the same headers. but when i finally got everything together i stripped out the bolt holes and sent the head to a machine shop to install helicoils. now the very back header bolt has popped off and the third from last is rounded out. i dunno what it might be. Is the header warped where it meets the head? it is kinda old. I'll still have to get new helicoils so thats not a big problem. hmmmm i dunno.
03-11-2012, 11:58 AM
#2
am gonna take a shot at this, and say that if your bolts keep popping out...you either
A. ripped them threads up in the cylinder head.
or
B. instead of the bolt having a nice sharp thread, theyve got rounded down threads not allowing you to bolt it down and have it tighten...
im more so gonna say A. i personally have never seen or heard of a header flange warping..even if that were the case, itd rip them weak aluminum thread right out...like whats happening.
A. ripped them threads up in the cylinder head.
or
B. instead of the bolt having a nice sharp thread, theyve got rounded down threads not allowing you to bolt it down and have it tighten...
im more so gonna say A. i personally have never seen or heard of a header flange warping..even if that were the case, itd rip them weak aluminum thread right out...like whats happening.
