Roger,
What you haven't provided us is the oil pressure reading - both cold and hot
running. I can tell you that the sound and conditions you describe mimic my
email to the list about 9 months ago. What does the noise sound like? Is
it a fast "ratatatatat", or is it a half-speed bang, bang, bang?
My problem turned out to be badly worn main and rod bearings, primarily
caused by the disintegration of two cam lobes. My oil pressure was about 25
lbs when running hot. In other words, my engine was due for a rebuild.
Without further information from you, however, diagnosis will be tough.
Good luck,
Eric Conrad
'76 TR6
-----Original Message-----
From: owner-triumphs@autox.team.net [mailto:owner-triumphs@autox.team.net]On
Behalf Of Roger Colson
Sent: Monday, August 21, 2000 7:36 PM
To: triumphs@autox.team.net
Subject: Unknown frightening noise. TR3 Help requested
Hello all,
I am now into month two of driving my TR3.
After attacking and eliminating the noises coming from loose bits. Now
I can hear a disturbing noise coming from the engine area.
A friend has listened to it and is pretty sure that it is not bearing knock.
He said to describe it as sounding sort of dieselish.
The noise occurs after warm up and under acceleration. The cut in
RPM will vary depending upon the road speed of the car. The higher the
speed the higher the RPM the noise will start. Because of the changing
RPM threshold I don't believe it is sympathetic vibration.
I can control the noise by opening and controlling the throttle. I can get
on the edge and by curling my toes get the noise at will.
The engine pulls quite strong and compression is good on all four
cylinders.
Any thoughts as to what it may be and how to test will be appreciated.
Thank you,
Roger
Roger Colson
57 TR3 TS21383L
sassamon@mediaone.net
http://people.ne.mediaone.net/sassamon/TS21383L
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