I have a 1971 350/270 with AC & PS.
I've noticed that my waterpump pulley has a wobble to it.
Pully P/N is 3991434BY which I believe is correct for this engine.
There were 4 washers being used as spacers between the pulley and the waterpump mounting flange. When I removed the washers and placed the pulley back onto the waterpump, the pulley rubs against (what I believe is a bypass fitting snout - see attached photo). There is no P/N on the waterpump. "H14" is in raised letterson the right side of the pump. Also, "60" and "19" are stamped under the shaft. It has a weep hole above & below the shaft.
The archieves mention that "pump #3991399 was used only for 1971-E1972 Corvette small blocks and some MD/HD trucks of that period. Overall, it's one of the rarest of all Corvette waterpump castings.
It was the ONLY waterpump casting of short leg, large bearing, reinforced snout and no upper bypass fitting. So, as you say, it's very easy to ID without even looking at the casting number."
So, my questions are:
1) Is this the wrong pump for this engine? I believe the answer will be Yes.
2) Any recommendations on where to find the correct pump?
3) Any recommendations on how to space the pulley so I can drive with this pump?
Thanks in advance.
Tom
I've noticed that my waterpump pulley has a wobble to it.
Pully P/N is 3991434BY which I believe is correct for this engine.
There were 4 washers being used as spacers between the pulley and the waterpump mounting flange. When I removed the washers and placed the pulley back onto the waterpump, the pulley rubs against (what I believe is a bypass fitting snout - see attached photo). There is no P/N on the waterpump. "H14" is in raised letterson the right side of the pump. Also, "60" and "19" are stamped under the shaft. It has a weep hole above & below the shaft.
The archieves mention that "pump #3991399 was used only for 1971-E1972 Corvette small blocks and some MD/HD trucks of that period. Overall, it's one of the rarest of all Corvette waterpump castings.
It was the ONLY waterpump casting of short leg, large bearing, reinforced snout and no upper bypass fitting. So, as you say, it's very easy to ID without even looking at the casting number."
So, my questions are:
1) Is this the wrong pump for this engine? I believe the answer will be Yes.
2) Any recommendations on where to find the correct pump?
3) Any recommendations on how to space the pulley so I can drive with this pump?
Thanks in advance.
Tom
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