Re: Broken bolt

["content22207" <brobertson@xxxx>]

I wonder if this would be a good time to change bolts to 8mm (can you
even get 7mm Helicoils)? Would dramatically increase fastener options.
BTW: metric Helicoils probably have to be mail ordered. Could convert
to 5/16" from any parts house if you don't mind mongrelizing car.

Only one time in my life have I drilled straight through a bolt.
Didn't even have to re-tap hole. Only one time. Every other time have
been off center enough to Helicoil or tap to next larger size.

Once you get a threaded hole, another option would be converting bolt
to stud and a nut. Am seriously considering taking my intake manifold
off AGAIN to do that while my own internal water pipe bolts not
frozen. Have found source of stainless steel 7mm drill rod and nuts.

Bill Robertson
#5939

>--- In dmcnews@xxxxxxxxxxxxxxx, "David Teitelbaum" <jtrealty@xxxx> wrote:
> The "standard" technique is to very accuratly centerpunch the broken
> off piece of bolt "dead center". Next is to drill into the bolt with a
> size drill smaller than the root diameter of the bolt. Next you insert