At one time there was an afer market piston that was pretty widly used and
it had rings as you have described. The rings are generally broken from
detonation. Look around the squish area on the exhaust valve side and see
if it looks like the craters of the moon or a heavy sand blasted appearance.
If so.....detonation.
----- Original Message -----
From: <WEmery7451@aol.com>
To: <fot@autox.team.net>
Sent: Monday, June 26, 2000 9:51 AM
Subject: TR-3/4 Engines
> Dear Fot:
>
> After counting engine heads in the garage and trying to remember how many
> heads were sold and scrapped, my estimate is that I have torn apart
> approximately fifteen different engines over a period of 36 years. Some
of
> you have disassembled many more.
>
> This last engine had weird looking pistons, and I wondered if they were
one
> of British Leyland's designs or options, or someone else's pipe dream.
The
> pistons were flat domed with the normal two compression rings and one oil
> ring above the connecting rod to piston pins. Below these pins was an
> additional oil ring.
>
> The engine either had seen a lot of mileage, or the piston design is poor.
> The top compression ring was broken on all four pistons, and small pieces
> were broken out of three of four pistons at the top compression ring.
Just
> curious, Bill Emery
>
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