Hi Gary,
The pulley is one piece on my 73, Don't know if there were different type's
between years. The pulley's came apart somehow if just the front pulley is
turning, Had to be after the fan clutch lock up I would guess. I would check
the pulley real good. And repair/replace as needed.
Ron&Gina
73 Pumpkin-Rose
Ft. Mohave, AZ.
- ----- Original Message -----
From: "Gary Berry"
To:
Sent: Monday, July 03, 2000 11:28 PM
Subject: GMC: Water pump pulley
> Hey All;
>
> Went to Bakersfield, Ca today to pickup a boat (250 miles one way) with
> my brothers GMC (76 Palm Beach). About 20 miles away from our destination,
> the roar from the engine started and didn't stop. Temp gauge went almost
to
> C from 1/4 and the oil pressure went up a few pounds. The fan clutch had
> failed stuck. We did get to Bakersfield, then managed to find a
replacement
> at the local AutoZone. In putting it back on, we came upon something
> strange. The water pump pulley has 3 pulleys on it. One for the
alternator,
> one for the power steering pump, and one for the AC compressor. After we
had
> replaced the fan clutch, we noticed that as we tried to tighten the bolts
> that connect the fan clutch to the water pump, that just the front pully
> would turn. The other two atayed stationary. Now, I've never seen this
> before. If this is suppose to be how it works, then just how does it work?
I
> thought all 3 pulleys were made as a unit. It looks from this
configuration,
> that if you loose the AC belt, you loose the ability of the fan to suck
air.
> Any explanations? We're stumped. Is this something we should worry about?
> He's taking his GMC back to Washington on wednesday, so need to know if we
> need to change anything. Thanks.
>
> GaryB and LarryB
> 76 PB's in Ca.
> ________________________________________________________________________
> Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
>
The pulley is one piece on my 73, Don't know if there were different type's
between years. The pulley's came apart somehow if just the front pulley is
turning, Had to be after the fan clutch lock up I would guess. I would check
the pulley real good. And repair/replace as needed.
Ron&Gina
73 Pumpkin-Rose
Ft. Mohave, AZ.
- ----- Original Message -----
From: "Gary Berry"
To:
Sent: Monday, July 03, 2000 11:28 PM
Subject: GMC: Water pump pulley
> Hey All;
>
> Went to Bakersfield, Ca today to pickup a boat (250 miles one way) with
> my brothers GMC (76 Palm Beach). About 20 miles away from our destination,
> the roar from the engine started and didn't stop. Temp gauge went almost
to
> C from 1/4 and the oil pressure went up a few pounds. The fan clutch had
> failed stuck. We did get to Bakersfield, then managed to find a
replacement
> at the local AutoZone. In putting it back on, we came upon something
> strange. The water pump pulley has 3 pulleys on it. One for the
alternator,
> one for the power steering pump, and one for the AC compressor. After we
had
> replaced the fan clutch, we noticed that as we tried to tighten the bolts
> that connect the fan clutch to the water pump, that just the front pully
> would turn. The other two atayed stationary. Now, I've never seen this
> before. If this is suppose to be how it works, then just how does it work?
I
> thought all 3 pulleys were made as a unit. It looks from this
configuration,
> that if you loose the AC belt, you loose the ability of the fan to suck
air.
> Any explanations? We're stumped. Is this something we should worry about?
> He's taking his GMC back to Washington on wednesday, so need to know if we
> need to change anything. Thanks.
>
> GaryB and LarryB
> 76 PB's in Ca.
> ________________________________________________________________________
> Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
>
