Could be a big problem if the pistons are not very close in weight. If the
weight is really close I can't see why 3 or 4 rings would make much
differrnce
On Dec 24, 2011 4:39 PM, "Alex" <ambritts@bellsouth.net> wrote:
> Well, found out the problem at least with the number 3 cylinder in my 59
> TR3A.
>
> After establishing with the leak down test that we had a constant air
> stream
> exiting the engine vent tube, we pulled the head again, dropped the pan and
> pulled out #3 piston.
>
> The 2 piston channels where the rings seat were cracked and broken along
> with
> the ring (s). Everything was riding in its' place without any apparent
> damage.
>
> The sleeve wall had a few very minor scratches that the hone will easily
> remove. The piston is not 86mm as I earlier reported but 87mm with 3
> rings. It
> is stamped RENZ 140pd in the hollow of the piston. A Google search did not
> turn up anything for this piston.
>
> So now a search for 1 piston with rings. There are many sets listed in the
> Moss catalog but then again even with the sets there does not appear to be
> 87mm 3 ring pistons.
>
> Anyone know if putting in an 87mm 4 ring would harm anything? Would appear
> not.........not sure about balance issues..............or anything else.
>
> So the main mystery is solved. Interesting point is how the smoking was
> almost
> eliminated with the last few drives just before I pulling the head.
>
> Now onto the carburetors and the condensation issues after the engine is
> put
> back together.
>
> Good time to replace the skinny roadside repair fan belt that was installed
> last year with a breakdown. :o)
>
> Wishing everyone a very Merry Christmas, Happy Hanukah and Happy New Years.
> Alex Manzo
> 59 TR3A
>
> Moss does not show a standard 87mm piston available
>
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