If you haven't had a liner with a chip out of the bottom you haven't had
many engines apart. It dosen't hurt a bit though to radius the edges so
JUST IN CASE you need to reach up in there to fix something else and hit the
edge. Never have had a split liner and used a ton of 87mm liners and
pistons, dosen't mean it isn't common, just in my couple hundered engines I
never had this occurance.
----- Original Message -----
From: <Catpusher@aol.com>
To: <lee-cc@worldnet.att.net>; <WEmery7451@aol.com>; <fot@autox.team.net>
Sent: Monday, January 10, 2000 6:02 PM
Subject: Re: TR4 Engine Questions
> In a message dated 1/10/00 11:05:39 AM Pacific Standard Time,
> lee-cc@worldnet.att.net writes:
>
> <<
> It's been 15 years since I last worked on my TR4. I have dissassemble
> it and am getting it back into racing condition. As a matter of fact
> Jack Wheeler built the engine I am in the process of freshening up. It
> ran supberbly, by the way.
>
> Unfortunately I have lost my manual and have a couple of questions. The
> machine shop wants to deck the block because the sleeves are protruding
> a bit. Seems to me they are supposed to be above the block a few
> thousandths, but can remember for sure.
>
> Also, I chipped one of the sleeves at the bottom in the shape of a half
> moon. There's about 1/4 inch chunk missing from the bottom. The piston
> doesn't put any load on this part of the sleeve, I don't think, and was
> wondering if this would be a problem or should I try to locate another
> 87mm sleeve?
> Is there somewhere I can buy a set of 87mm sleeves to replace what I
> have?
>
> I'm sure I'll have more questions later. Bear with me, it may take me
> awhile to get the cobwebs out of my head where I store the Triumph data.
>
> Thanks for your help.
> Jim Lee >>
>
> Step 1 get a factory (or the Bentley reprint) workshop manual. TRF and
> www.ewacars.com come to mind. It will be money well spent (as was having
> Jack W build it, imho)
>
> The liners should be .003" to .0055" (.005" in the later manual) above the
> block once the liners have been settled.
>
> As for the liners, including Bill Emery's question: Steve Froines told me
> that the factory went back from 87mm to 86 mm liners for the last season
of
> racing the TR4As because of splitting Hepolite 87 liners. Enough water
gets
> in a crack to
> usually hurt the block, crank, rod, and head. I did not quite believe him
> until I
> had it happen. I am currently running 87mm liners that fit in a standard
> block,
> but are thicker above the figure 8 gasket. FOT member Ken Gillanders
(BFE)
> supplied them. Probably more than a few of us have run liners with a chip
out
> of the bottom, but I would only do it in an emergency.
>
> What would I know about this? :-)
> Hardy Prentice
>
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