Re: [DML] Re: Broken bolt

[mike.griese@xxxx]

7mm helicoils are available, I've used them before. You need to 
take some care in increasing the size of bolt holes, particularly
around water jackets.

--
Mike
> 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