[TR] low compression on cylinder no. 6

[Jerry Van Vlack]

I would suggest that the spark plug be removed when spinning the engine 
after a liberal soaking. If liquid remains it will not compress and could 
cause further damage if the plug is replaced. Otherwise a good idea.
JVV
----- Original Message ----- 
From: "tom white" <tswhitez123 at hotmail.com>
To: <dmb993 at earthlink.net>; <triumphs at autox.team.net>
Sent: Wednesday, April 14, 2010 10:38 AM
Subject: Re: [TR] low compression on cylinder no. 6


> 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 at earthlink.net
>> To: triumphs at 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