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Re: TR3A Piston Rings (Expansion Rings?)

To: Gbouff1@aol.com
Subject: Re: TR3A Piston Rings (Expansion Rings?)
From: Susan and John Roper <vscjohn@iamerica.net>
Date: Sat, 06 Jan 1990 10:35:52 -0600
Cc: triumphs@autox.team.net
Organization: Vintage Sporting Cars
References: <c3a27ac8.36ae97fb@aol.com>
Gary, I believe Hastings is located in the San Francisco area.  They have been
around a long time and make a good product, but the term 'expansion ring" is
strange to me because all conventional rings expand to meet the cylinder walls.
John

Gbouff1@aol.com wrote:

> Dear listers,
>
> I will shortly be removing the pistons so that I can hone the cylinders (as
> one is slightly scored) and replace the rings.  I would prefer not to bore out
> the liners so that I don't have to repace the pistons.  I will also check the
> fit of bearings with a plasti-gage but they exhibit no play and may be fine.
> The odometer shows 42,000 miles which is probably true as the trunions had
> almost no play.
>
> My question concerns the use of expansion rings.  A business aquaintance of
> mine has restored several english cars over the years, and when he has had to
> hone the cylinders, he also would replace the rings with HASTINGS expansion
> rings.  The reasoning being that the use of such rings would help fill any
> slight excess piston gap.  He has run cars for thousands of miles using this
> practice with no apparent problems, good compression, normal oil consumption
> and no piston slap.
>
> Has anyone else ever used expansion rings?  If so what was your experience?  I
> haven't been able to find anyone that carries the Hastings brand.  Are they
> still in busines or are there other brands available?
>
> As always your comments are appreciated.
>
> Thanks in advance,
> Gary Bouffard
> 59 TR3A  TS 58399




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