One possibility that I've encountered is a misalignment of the two pulleys,
like the alternator is cocked to one side, or in a different plane. You
should be able to see it from the side. I like George's solutions, and I'm
sure others will come up with more. I've had crank bearings go bad; they
didn't squeal, and began to knock pretty quick. I doubt that's the problem,
especially with the sound disappearing with cold water on the alternator.
Skip Gurnee 64 TR4, 65 TR4A
Nevada
-----Original Message-----
From: terryrs@comcast.net
Sent: Friday, August 24, 2012 2:41 PM
To: Triumphs
Subject: [TR] Overheatng
History. Have about three thousand miles on the engine rebuild. When I
started it the first time, there was intense squealing for a few seconds
that then went way. I figured it for a dry water pump.
Squealing has returned. Sounds for all the world like a fan belt issue or a
bad bearing on either the water pump or alternator. Tried the stethoscope,
couldn't isolate, so swapped out the water pump. Squeal persisted.
Stethoscoped the alternator again, couldn't isolate, but then accidently
dropped cold water on the alternator and the sound stopped abruptly. What
was THAT all about??
So, bought a new GM alternator, adapted it to fit, put the old wide-belt
pulley on it, and reinstalled. Same squeal as before.
But in the past week, the engine is overheating at idle and in hot weather.
I'm running the belt looser than I usually do, but watching the action, the
pulleys all seem to be turning, but am wondering if they're not going as
fast as they should and the squealing is slippage?
Will try belt dressing to see if that changes anything.
Question: If I was spinning a crank bearing, either main or rod, it would
make much different noises than a belt squeal, right?
Terry Smith, '59 TR3A
New Hampshire
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