Tom,
At the very least it is time to pull the head! This will very likely tell
you if you have a holed piston or some other major internal problem, and it
seems that you might. Zero lbs compression is rare! It may be time to do a
complete engine overhaul.
Good luck and keep us informed!
Jim Bauder
'68 TR250, CD47L
TR web site: http://www.triumphowners.com/647
Scottsdale, AZ
-----Original Message-----
From: owner-triumphs@autox.team.net
[mailto:owner-triumphs@autox.team.net]On Behalf Of Tom Boggiano
Sent: Saturday, September 03, 2005 6:45 PM
To: triumphs@autox.team.net
Subject: Engine diagnostocs help (tr4)
The 4 had been running very well all summer, now that the cooler driving
weather is upon us I found the car running much hotter than previously all
summer and oil pressure which was rock solid 80 lbs at 3500 rpm drops to
55-60 lbs. It seems to lack any real power and is particularly bad on a
hill.
I also hear rattling/knocking noise from the front of the engine at low rpm,
almost a clicking noise.
So in trying to track it all down I ran a compression check on the engine
this morning and the results don't come out well: 115 30 155 0 (or near
0) from cylinder 1 to 4. With numbers like this how is it even running at
all? I re-ran all the compression test several times and the all come back
right to where they were originally recorded.
My next check was to check the adjustment of the rocker arm for proper valve
adjustment but baring that working (and I don't hold much hope) what does
the collective wisdom of the list think. Where should I go to next?
Thanks
Tom
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