Mark,
Squirt a few shots of oil into the cylinders and recheck the compression.
If it goes up you have ring problems.
Or even better> remove the guts from an old sparkplug and braze in an air
fitting (or if the hose on your compression gauge permits you to hook it up
to an air compressor, use it). Remove rocker shaft (or lock each cylinder
up in the TDC Position, with valves closed). Apply some air pressure. Then
use your ear. Hissing out of the tailpipe, bad exhaust valve. Out the
carbs, bad intake valve. Out the block, bad rings. While your at, it remove
water pressure cap, hissing, bad head or gasket. Also checking at TDC and
BDC will check for taper in (or worn) cylinder. Sorry, this tool will not
check for worn bearings!
One tool will tell you more about your engine then a whole tool box of
other stuff. Valves, rings, head and gasket, and cylinders: your whole
upper engine. In a few hours you will know the condition of and what to
expect if you have to tear-down your engine.
Mark
----------
> From: Mark Stahlke <mstahlke@denver.infi.net>
> To: Triumphs <triumphs@autox.team.net>
> Subject: More TR6 Head Questions
> Date: Saturday, October 11, 1997 3:36 PM
>
> I just ran a compression test on my 71 TR6 with its 74-ish engine.
> The numbers are 122, 120, 120, 129, 124, 129. These numbers seem a little
low.
> Maybe tomorrow I'll check the valve lash and test it again.
>
> Would numbers in this range indicate a 7.5 to 1 head as fitted to 74
> models?
>
> Are the single pipe and dual pipe exhaust manifolds compatible in
terms of
> port alingment? What about the intake manifolds?
>
> Comments anyone?
>
> Thanks,
> Mark Stahlke
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