In a message dated 10/29/2006 9:12:53 AM Pacific Standard Time,
owner-fot-digest@autox.team.net writes:
> From: owner-fot@autox.team.net on behalf of Mark York
> Sent: Sat 10/28/2006 9:36 AM
> To: FOT@autox.team.net
> Subject: [FOT] Sleeves
>
> Amici
>
> 2 questions for the group:
>
> 1) After removing all 4 pistons from the block I cannot get the wet sleeves
> out. Im trying not to damage them because I believe they might be original
> 1991cc sleeves that could possibly be honed out (see Joe Alexanders thread
> a month or so ago). Ive sprayed them with penetrating fluid (Kroil) and Im
> hitting them with a rubber mallet but no luck. Ive considered making a
> press with some threaded rod and steel straps. Does anybody have a better
> idea?
>
> 2) The pistons have the normal 3 rings at the top of the piston but in
> addition there is a 4th ring that is located about > inch from the bottom of
> the piston skirt. Was this an aftermarket piston or did the factory supply
> them this way, (Ive never seen them this way)?
>
> Regards
>
> Mark
In my experience, at least on the 1200cc Triumph Herald, 4-ring pistons were
intended for relatively low compression engines,
and if used on higher compressions they are weak at the bottom ring and will
break up...do not ask me how I know this.
My advice is to avoid using 4 ring pistons in at all possible, and stick to
3-ring.
Good Luck
Leon
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