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TR4A Fuel Pump rubber bits, etc.

To: "Triumphs@Autox.team.net daily digest" <triumphs@autox.team.net>
Subject: TR4A Fuel Pump rubber bits, etc.
From: "Jeffrey J. Barteet" <barteet@barteet.com>
Date: Thu, 1 Aug 2002 10:54:46 -0700 (PDT)
Another lister mentioned his fuel pump rebuild kit from Moss had some
rubber bits that reacted to the gasoline he was using.

Last week, I pulled out my '62 TR4 for a drive and was looking under the
hood as it idled after checking the fluids, and noticed I had a pretty
good leak coming from the fuel pump. I'm guessing the diaphram ruptured.

What makes this mildly irritating was this pump was rebuild with a Moss
kit a couple of years ago. It worked faultlessly until last weekend.

My guess is that the kit either:

1. Was constructed from sub-standard rubber components
2. Reacted to a new formulation of gasoline
3. Has been reacting with modern formulations of gasoline since the day it
was installed.

One of the Moss guys wrote an article for 'British Motoring' a few years
back about the effects of new gasoline additives on the various rubber
components of older cars. This could indeed be the cause.

If so, then I suspect we'll see on-going fuel delivery problems until the
rubber bits are constructed from new materials.

-jeffrey

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