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GMC V6 and V12 Engines Engine repair and rebuilding

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  #1  
Old May 7th, 2020, 10:23 PM
animalsservicar animalsservicar is offline
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Default 1966 4000 351 water pump

howdy folks . I have a 66 4000 with a 351 V6 & I'm having one heck of a time findina a water pump . does anyone have a part # for Napa or someone else that I can have my NAPA try to cross ?
thanks
animal
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  #2  
Old May 7th, 2020, 10:59 PM
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LEWISMATKIN LEWISMATKIN is offline
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Default Re: 1966 4000 351 water pump

does this truck have air brakes or hydraulic brakes? If air brakes, then ebay has a rebuilt pump. If hydraulic brakes, then it takes the same pump as the 305. NAPA offers a rebuilt pump p/n 58-160. I hope this helps you.
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Old May 7th, 2020, 11:33 PM
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Default Re: 1966 4000 351 water pump

OK , I have hydraulic brakes , thank you very much
animal
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Old May 8th, 2020, 02:17 AM
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Default Re: 1966 4000 351 water pump

would the 1/2 - 1 ton trucks with the V6 use the same water pump ?
My Napa has been striking out .
thinking if I can broaden the range they may have better luck
thanks
animal
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Old May 8th, 2020, 09:20 PM
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Default Re: 1966 4000 351 water pump

Animal:
Summit lists one online here:

https://www.summitracing.com/parts/g...odel%2F1000%2F

Yours should be the same as small trucks based on Lewis' advice.

Hope this helps.
Regards
Steve
New Orleans
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Old May 8th, 2020, 09:28 PM
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Default Re: 1966 4000 351 water pump

if i needed one, at the price listed, I'd buy 2!!!
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Old May 9th, 2020, 01:47 AM
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Default Re: 1966 4000 351 water pump

thanks for the Summit link . I couldn't get their search to work yesterday or this AM . I found one at Orileys , will post their part # after I compare it to mine
thanks
animal
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Old May 10th, 2020, 03:28 AM
BobBray BobBray is offline
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Default Re: 1966 4000 351 water pump

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.
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Old May 10th, 2020, 06:52 PM
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Default Re: 1966 4000 351 water pump

OK the water pump # from Oreilly is B302835 & as yesterday price @ 45.99
I also bought a 2"x 24 GAtes #26512 flex/universal upper radiator hose& that cost me $52.00 & some change . just about hit the floor when they range the hose up , guess it's been some time since I have bought a universal hose.
thanks again
animal
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Old May 12th, 2020, 04:56 AM
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Default Re: 1966 4000 351 water pump

Animal:
Looked up the same hose on rock auto.com. They show it for $22.79. O'Reilly was out of line on that one...
Regards
Steve
New Orleans

https://www.rockauto.com/en/parts/ga...pper+hose,2058
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