That's news to me. First time I rebuilt my engine, the cylinders
looked good and I didn't have to fit overize pistons. Just had them
lightly honed so that the new rings would seat well (you should always
replace the rings even if refitting the original pistons, and therefore
should hone the cylinders to make sure they seat). The car was fine
and didn't burn oil.
If you do indeed need to fit oversized pistons, all the parts houses
stock pistons in 20, 30, and 40 over sizes.
Tim Holbrook
1971 TR6
--- "Dan H. Detweiler" <dandet@alltel.net> wrote:
> Hi folks,
>
> I was just told by a fairly well known engine man in the Atlanta area
> that all
> British engines need to have the cylinders bored out and oversized
> pistons
> made for them when they are rebuilt. He stated to me that the
> cylinder walls
> are a soft metal and that they almost always have worn almost as
> quickly as
> the piston rings. He said that if this is not done that the engine
> will start
> burning oil within 6 months. I can't tell the amount of wear on my
> engine
> because I STILL can not get the head removed. He suggested welding
> the
> remaining nuts to their studs and giving them a good rap to try to
> break the
> crud that he felt had probably gathered around the stud and then
> baked on by
> the heat of the manifold effectively sealing the studs to the head.
>
> Can anyone PLEASE shed some light on this for me. Having oversized
> pistons
> manufactured was not on my list for this rebuild if possible.
>
> Thanks in advance.
>
> Dan H. Detweiler
> "70 TR6 CC51639
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