FYI, Loctite makes a "kit" to do this. It is designed to repair stripped
threads. Basically there
process does what Rick has done, but their product is made especally to repair
threads.
Larry Hoy
>-----Original Message-----
>From: owner-mgs@autox.team.net [mailto:owner-mgs@autox.team.net]On
>Behalf Of R. O. Lindsay
>Sent: Friday, November 17, 2000 7:17 AM
>Cc: mgs@autox.team.net
>Subject: A little head repair (long
>
>
>Hi Gang,
> Upon rebuilding the head in my '70 MGB-GT I discovered that the casting was
>damaged at
>one of the thermostat cover studs. It appears that someone twisted just a
>little too hard while
>removing a stud. The iron cracked away from the hole and partially into the
>thermostat seat.
>An arguably poor quality picture of that damage is at:
>http://www.geocities.com/btg80397/MGB-GT/ThermostatHousingDamagedAtOutboardStud.jpg
>
> To repair the thread damage, a HeliCoil was inserted. The PO solved the
>symptom by filling
>the 'divot' with silicone gasket material and using bolts rather than studs. I
>don't like those kinds
>of repairs but I also don't like spending big bucks for a new head or for
>welding and retapping
>the casting. The damage is in a low stress location so the solution is to
>repair with epoxy.
> In the next picture you can see the J-B Weld epoxy curing around a bolt
>temporarily threaded
>into the head:
> http://www.geocities.com/btg80397/MGB-GT/ThermoststHousingDuringRepair.jpg
> The white substance around the bolt is Teflon plumbers tape. In this case
>it
>is
>functioning as a mould-release agent. Once the epoxy is fully cured the bolt
>will be unscrewed
>and the epoxy will be carefully filed to the correct shape. The repair will be
>complete with the
>installation of a correct stud. Time intensive but hey, this is a hobby.
> At the time of this writing, the epoxy is still curing. Hopefully these two
>pictures will tell
>a story in a way that you might be able to benefit from someday. I will post a
>picture of the
>completed repair sometime this weekend.
>
>Best regards,
>
>Rick Lindsay
>Diamond Geoscience Research
>5727 S. Lewis Ave., Tulsa, OK
>Voice: +1 918-747-3456
>Fax: +1 918-747-8599
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