Joe wrote:
On Mar 10, 12:38 pm, Deke wrote:

I need help.

I broke all 3 studs off my manifold so had to drill out the bolt and
rethread with a tap.

When drilling out the broken bolt, I missed the center and also
drilled at the wrong angle.

Any hints at making a perfectly aligned hole right thru the center of
the bolt at the perfect angle?


If these studs were on a cast iron manifold your attempt at removal
was all wrong. What has worked for mechanics for years was to use the
rosebud tip on the acetylene torch and gently bring the casting up to
red heat and then quickly use your Visegrips to unscrew the stud. Even
with a broken stud you can add enough new metal with a MIG welder to
grab the broken stud with Visegrips. Sounds like you will need to buy
a new manifold now, sorry. HTH

Joe


May be the easiest way out... what kind of car is this?

I'd suggest, if it is a common manifold, getting a replacement from a
junkyard and then removing the studs (as Joe suggests) with a torch, and
installing new ones with plenty of anti-seize. Use brass nuts to attach
the downpipe, as well - they don't rust like steel and if the stud rusts
badly enough to grip them tight they can be burned off with a torch and
then you can rethread the studs with a die, assuming they don't come
right out.

nate

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