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  #31  
Old March 8th, 2023, 02:39 PM
Prowbar Prowbar is offline
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Default Re: V6 water pumps getting hard to find

Quote:
Originally Posted by LEWISMATKIN View Post
the pontiac impeller has somewhat taller blades, they are shorter in length, and are turned the opposite direction than the GMC pump. the pontiac impeller also has 3 large holes that surround the hub of the impeller.
Opposite direction? Rotation-wise or the way it pumps inside? The vanes face the same direction for the GMC and Pontiac pump?
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  #32  
Old March 13th, 2023, 08:38 PM
BobBray BobBray is offline
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Default Re: V6 water pumps getting hard to find

Pontiac V-8's up to 1959 had reverse-flow cooling, maybe that explains the different impeller:

http://www.pontiacsafari.com/EngineCooling/
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  #33  
Old March 14th, 2023, 09:01 AM
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Default Re: V6 water pumps getting hard to find

Interesting. Though the aftermarket water pump (GMB 1302835) I bought from Rockauto for a 1963 Pontiac Tempest with the 326ci V8 (which is past 1960, so the correct cooling system) is the suitable water pump for a light-duty V6. Vanes face the same way, and it is a direct bolt-in.
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  #34  
Old March 15th, 2023, 06:09 AM
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Default Re: V6 water pumps getting hard to find

BTW, Summit Racing has the GNB 130-2835's back in stock.
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  #35  
Old August 3rd, 2024, 05:14 PM
KiwiGMC KiwiGMC is offline
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Default Re: V6 water pumps getting hard to find

Hi there, new to the forum. Ive got a 66 with a 351E in it, trying to locate a water pump among many other parts. ANy one have any ideas
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  #36  
Old August 3rd, 2024, 07:08 PM
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Default Re: V6 water pumps getting hard to find

Welcome to the Forum KiwiGMC!

This one listed for the 305 V6, dimensionally the same as the 351.

https://www.oreillyauto.com/detail/c...ter+pump&pos=0


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Last edited by Funky61; August 3rd, 2024 at 08:25 PM.
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  #37  
Old August 5th, 2024, 07:53 AM
BobBray BobBray is offline
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Default Re: V6 water pumps getting hard to find

The 4 bolt flange water pumps are out there, you just need to hunt a bit. Try looking up a water pump for a '57 Pontiac Star Chief with a 347 V-8, the pump listed for that car these days is the same one for a GMC V-6. Lewis Matkin pointed this out earlier and he is right.

Last edited by BobBray; August 5th, 2024 at 07:58 AM.
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