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drilling exhaust manifold

To: vintage-race@autox.team.net
Subject: drilling exhaust manifold
From: Calvin Krug <ckrug@laf.cioe.com>
Date: Fri, 2 Jul 1999 17:51:57 -0600
I'm hoping one of you mechanical-types can help me out.  I recently had a
steel exhaust manifold flange welded, and now I'm trying to redrill the
hole for the stud.  I can't find any drill bits that will cut through the
welded steel.  I've tried regular high speed drill bits, titanium-coated,
cobalt, and most of them won't even touch it.  Yes, I'm using cutting oil.
I've managed to get about 1/8" through, but the more I try, the less effect
I seem to have.  Any ideas?

Calvin Krug
trying to rebuild my MGB



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