Lets harken back to yesteryear with a old Ford approach. Why not drain the
oil from the engine and then spray #6 cylinder liberally with kerosene or your
favorite penetrating solvent. Let it set for several days with intermittent
reapplications. Then turn the engine on the starter for a few hundred
revolutions and take another compression test.
Best regards,
Tom
> Date: Tue, 13 Apr 2010 10:05:54 -0400
> From: dmb993@earthlink.net
> To: triumphs@autox.team.net
> Subject: [TR] low compression on cylinder no. 6
>
> Folks,
>
> I put my TR250 to bed about a year ago, didn't do any
> special preparation, just parked it in my garage and shut her
> down. Today I did a compression test on the cold engine and
> all cylinders are 170psi (or so) but number 6 is 90psi. I squirted
> some lightweight oil (all I had on hand) into no. 6 and the psi
> increased to 140psi. The car has been used sporadically,
> spending lots of time sitting. I'm thinking a stuck ring on the piston
> groove. Any other ideas? If it's a stuck ring what are the chances
> of an easy fix (removing the piston, freeing the ring, re-insertion
> into the bore, wishful thinking :))
>
> Thanks,
> David Brady
> '68 TR250
> CD8124L
>
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