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Re: Head Plug

To: fot@autox.team.net
Subject: Re: Head Plug
From: Catpusher@aol.com
Date: Mon, 8 Aug 2005 18:57:26 EDT
The last few new TR3B MK ll heads (TR4A) that I obtained directly from the CA 
factory depot had the top of the plug peened around the plug OD; clearly a 
factory modification.

A trackside fix is to drill and tap the plug, say for half inch NC and put a 
set screw through a flat washer large enough to cover the plug into the new 
threads.  The pulling force on the plug also helps to seal the threads; we put 
sealer on all items.

I only had problems once with a head that had been heated to weld.

  Hardy

P.S. if anyone knows of Triumph things to do in London, Ellie and I will have 
two short visits
there soon.  Please reply Off List, thank you.

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