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[TR] Messed up rocker shaft stud holes

To: Friends of Triumph <fot@autox.team.net>, Triumph List
Subject: [TR] Messed up rocker shaft stud holes
From: A Daniel Cronin <adcronin@ameritech.net>
Date: Sat, 4 Oct 2008 15:56:49 -0700 (PDT)
Purchased a 4A head several months ago (mail) and just noticed that someone in
the past has "chased" the stud holes with either the wrong tap (metric?) or
otherwise.  Has anyone had any experience using heli-coil in-certs in a
situation like this or are there other methods?  Is there enough room around
the stud casting in the water jacket area to drill out for the next larger
stud size?  In addition, noticed that the back intake manifold stud hole
appears to have been drilled out so it is open to the head stud.  Any problem
with this other than remembering that the intake stud needs to be loosened
before trying to take out the head stud down the road?
 Planning & Development
Services
A. Daniel Cronin
248 761-2673
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