Steve
A picture would be very helpful here.
You have one belt that goes from the water pump to the AC only?
Does the belt sit in both the water pump and AC pulley grooves the same?
Might the AC bracket be flexing under load?
Ron Fraser
-----Original Message-----
From: owner-tigers@autox.team.net [mailto:owner-tigers@autox.team.net] On
Behalf Of Steve Sage
Sent: Friday, June 17, 2005 3:45 AM
To: Tigers
Subject: Squealing Belt Or Water Pump??
Hello Gang:
Here's a new one I'm fighting with. And yes, I know it's sacrilegious to
have A/C in a Tiger.
I've got my fan belt (routes across the crank pulley, the alternator and
the water pump pulleys) and my A/C belt around the water pump pulley
(it's a double pulley from a Ford Fairmont, as recommended by Tiger
Tom). I've got both belts on as tight as they'll go (maybe too tight??).
When I turn on the A/C, I often get a sudden squaling noise from around
the water pump pulley area. It eventually goes away when I play with the
gas pedal a bit. Gradual acceleration (with A/C on) doesn't cause the
squeal, but when I hit the pedal suddenly, it squeals as long as I'm "on
it". If I gradually accelerate (with A/C on), no squeal.
With the A/C off, everything's as quiet as a mouse (driving a Tiger,
anyway).
The A/C compressor puts a lot of torque out, and sends it over to the
water pump pulley that it spins off of. The water pump pulley itself is
"powered" off of the crank pulley.
I don't think the belts are slipping around the water pump pulley (of
course I could be wrong), but that's where the squeal seems to come
from. Would the water pump itself make that noise, when it's under more
torque from the A/C compressor when it's on? Maybe I've got the belts on
there too tight, and they're exerting too much pull on the water pump
pulley and bearing.
I've got a new water pump ordered from Sunbeam Specialties to take on
the trip to Tigers United, just in case, but I don't look forward to the
fun job of changing it, if I end up having to.
Any ideas will be greatly appreciated.
Steve Sage
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