[TR] Compression TR3A

[Jonas Payne]

Why not pull the valve cover gasket and verify that you don't have a stuck
valve or pushrod out of whack - just had an AH in the shop with no
compression on 6 and it turned out that it was a stuck valve.

I wouldn't run a car that isn't hitting on one cylinder, it will still be
getting gas, and the gas will wash the cylinder wall, accelerating wear and
eventually go to your crankcase.  It won't take long to have a crankcase
full of gas.

Jonas Payne
PBR Consulting Services, LLC
702.882.6711

-----Original Message-----
From: Triumphs [mailto:triumphs-bounces at autox.team.net] On Behalf Of Randall
Sent: Monday, November 16, 2015 8:20 AM
To: triumphs at autox.team.net
Subject: Re: [TR] Compression TR3A

> Am I doing any
> damage to the car if I drive her this way.  I always check the oil and 
> fill it when needed.  Is there a cheaper temporary fix?

Hard to know for sure, without knowing just what is going on inside.
Getting a compression reading of 0 is unusual and suggests a large failure,
like a broken piston or a stuck valve.

But, if it holds adequate oil pressure (at least 10 psi per 1000 rpm) and
there are no metal flakes (aka sparklies) in the drained oil; then I'd say
chances are that you aren't hurting it any further by driving it.  The parts
that are damaged will likely continue to deteriorate, but they already have
to be replaced anyway.

If it were mine, I would pop the head off and have a look.  There are
several partial repairs that can be done on the cheap, when you don't have
to pay for shop time.  But as noted, a professional shop is not likely to
want to do those sorts of things, for fear that you will blame them when
they eventually fail.

-- Randall  


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