>
> Curtis wrote:
> >Then it happened...SNAP. I broke off one of my head bolts in
> >the block. It was one of the long ones that hold the rocker arm
> >on as well. Help! How do I get the broken bolt out of the head?
I had the pleasure of a broken head bolt on my 1980 Olds Cutlass 5.7L
diesel engine. It was grade 9 (as hard as the drill bit for the easy
out). I got the remains of the bolt out in less than 2 minutes by
taking a pointed tool putting it near the top edge of the broken bolt
and tapping with a hammer. After turning the bolt a couple of
revolutions I could grab it with my fingers and twist it out.
________ Pointy tool
/----------\ /
/ <======\========== <<Tap
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\ / <--Pretend this is round
\__________/
> Jay Tilton wrote:
>
> But I'm wondering if anybody knows if a head bolt that snaps during torquing
> might cause any big problems. I'm envisioning a scenario where the sudden
> localized loss of clamping force would cause the head to warp or crack. Or
> would that only happen if the engine were allowed to run in such a state?
Fear not, a broken bolt during torquing won't damage the head. Warping
is caused mainly by overheating. Flatness is critical to get a good
seal with the head gasket.
Professional engine builders always use new head bolts and rocker arm
bolts when they rebuild engines. I didn't when I did my Pontiac 326
engine. Never had a problem.
- -Mark = =o&o
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