Roger,
The oil pressure is marginal and could signal worn bearings. But
rule out everything else.
More likely to be rod bearings than mains. Mine were very worn
and the mains were worn but not ready to give up the fight. You
could change the rod bearings from below to stave off an engine
rebuild for a year or two.
Personally... I would dive in for the rebuild this winter. That
way you can clean and paint he engine bay and get into full blown
shipwrights syndrome.
Brian Sanborn
62 TR4 CT16260L - Groton, MA
My TR4 Restoration Web Site
http://www.net1plus.com/users/sanborn/Home.html
E-Mail: sanborn@net1plus.com
-----Original Message-----
From: owner-triumphs@autox.team.net
[mailto:owner-triumphs@autox.team.net]On Behalf Of Roger Colson
Sent: Tuesday, August 22, 2000 10:35 PM
To: triumphs@autox.team.net
Subject: Update: Unknown frightening noise
Hello Listers,
An update about the noise in my TR3 engine.
What I know about the engine is that it has not gone through a
recent
rebuild. Records from the DPO (Deceased) indicate that a new
timing
chain was added. No other major engine work done during his 3
years
of active ownership. The TR3 sat unused for 9 years until my
purchase.
Compression is good on all four cylinders.
Oil pressure is 50 cold and when under speed, 20 hot and idle.
After removing the vibrating front grille I heard this noise.
Changed the
oil from Mobil 1 15W-50 to Castrol 20W-50. No difference.
Responses so far:
Something vibrating, like an air cleaner or bonnet prop rod.
Rod bearing.
Worn / loose Gudgeon pin.
Loose engine mount.
Ignition knock from wrong timing or low octane or hot spot in
cylinder.
The TR3 has been fuelled only by Sunoco 94 Octane.
I will be retarding the timing as recommended to see if that will
help.
An oil change to straight 50W will be done.
I will go over the nuts and bolts in the engine compartment
again.
Engine and transmission mounts are scheduled to be replaced this
winter. Parts are here.
Thank you for the responses.
Roger
Roger Colson
57 TR3 TS21383L
sassamon@mediaone.net
http://people.ne.mediaone.net/sassamon/TS21383L
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