1966 4000 351 water pump - Page 2 - 6066 (1960-1966) GMC Truck Club

#11

December 31st, 2020, 07:42 PM

turbobill

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Join Date: Feb 2013

Location: northern NY when not flying

Truck: 1968 HM80 with a 478M and a few engines plus a Toro-Flow

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Re: 1966 4000 351 water pump

Quote:

Originally Posted by BobBray

There are basically 2 water pumps for the V-6's, one has a threaded shaft and the other has a flange with 4 threaded holes. It is true that most of the time V-6's with air brakes use the pump with the threaded shaft, but be advised I have seen V-6's with air brakes that used the pump with the flange.

Actually three.

The Toro Flow uses a larger hub pilot diameter. I had to borrow the water pump off my Toro Flow for my 478M in my dump truck.

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