re. Broken exhaust manifold studs

wolff at wolff at
Thu Mar 28 20:59:12 EST 2002
and search for "left hand drill bit".
3mm lists at $2.90.
I ordered a selection for work. I put them in a clearly labelled case so no
one accidentally tries to drill with them using the wrong rotation.
"Nobody can forget the sound." - Michele Mouton

----- Original Message -----
From: "Fundsalo Racing" <fundsaloracing at>
To: <bswann at>; <eyvind.spangen at>
Cc: <quattro at>; <200q20v at>
Sent: Thursday, March 28, 2002 9:17 AM
Subject: Re: re. Broken exhaust manifold studs

> 2) If you can find one, us a reverse out(left hand)
> drillbit.  Start with a
> smaller size like 1/8' then graduate to larger size
> 1/4".  This will
> sometimes catch and extract the stud while you are
> drilling so you won't
> have to -

Aya, this is the way to go. The heat, vibration and
weakening of the stud by slowly removing it's guts
(sounds ghastly - no?) is often enough for the stud to
break loose from the piece and spin out under the
torque of the drill & bit. Go slowly and use a
low-power drill so if the bit jams in the stud the bit
won't snap off ala 'easy-out'.

Reverse-twist drill bits are hard to find. (!) Not
Craftsman, BTDT.... If anyone knows of a nation-wide
source or cheap mail-order source for reverse-twist
drill bits please share the source(s) and cost with
das list.


-glen  "If we give up our freedom as the price of security, we will no
longer be the great nation that we are"

United States Supreme Court Associate Justice Ruth Bader Ginsburg as quoted
by the Tucson Citizen


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