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Old Yesterday, 07:17 PM   #1 (permalink)
88blazer
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Join Date: Oct 2015
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water pump differences

Can anyone tell me the differences in water pumps and what years are different?I have an engine that needs a water pump and would like to know how to identify which one I need before I tear it apart.

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84 stepside with 3-53T Detroit 5 spd O/D Spicer
88 K5 was 350 TBI now 6.2L with GM3 turbo
84 dually crew cab 350 4spd 2wd
83 K5 6.2 diesel plow truck
98 3500HD 6.5L turbo diesel NV4500 going to be extend cab with 6V-53T, ZF 6spd and Mitchell aux. overdrive

Lots of parts trucks to keep the fleet going
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Old Yesterday, 07:18 PM   #2 (permalink)
88blazer
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I should ad that it's a v-belt setup

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84 stepside with 3-53T Detroit 5 spd O/D Spicer
88 K5 was 350 TBI now 6.2L with GM3 turbo
84 dually crew cab 350 4spd 2wd
83 K5 6.2 diesel plow truck
98 3500HD 6.5L turbo diesel NV4500 going to be extend cab with 6V-53T, ZF 6spd and Mitchell aux. overdrive

Lots of parts trucks to keep the fleet going
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Old Today, 02:10 AM   #3 (permalink)
redpepper
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Quote:
Originally Posted by 88blazer View Post
I should ad that it's a v-belt setup
Use a marine one
they shift more water if you have overheating problems with twin thermo housing on fresh water side
My chevys are marine and shift 70 per gallons per minute through cooling raw water system i had a burst pipe on it and had 3 x2000ltr per minute bilge pumps running to keep up with flood !

Sent from my SM-G965F using Tapatalk
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Old Today, 04:34 AM   #4 (permalink)
88blazer
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Join Date: Oct 2015
Location: Wilton, N.Y.
Posts: 53
iTrader Score: 1 reviews

Thanks for the reply. I don't have the twin thermostat mods and I don't have an over heating issue either. In fact just the opposite. I can't seem to get enough heat out of my K5 during the Winter mos. But that's a whole different thread. I replace the w pump 3 yrs ago . The engine is a '91 so I ordered a pump for a '91. When I got it it had a bolt pattern different to the one on the engine. So, I went back and got one for an '84. That one fit. The felpro engine gasket kit I have has 2 different gaskets . I have since gotten a timing cover gasket kit ( for other work that needed to be done) and it also has 2 different gaskets.
I want to order a new pump from Rock Auto but there are at least 3 different Delco part numbers between an '84 and '91. For a '91 their listing says there's 2 different pumps and to verify which one I need . Unfortunately they don't say how.
I just want to get the right one ahead of time.
__________________
84 stepside with 3-53T Detroit 5 spd O/D Spicer
88 K5 was 350 TBI now 6.2L with GM3 turbo
84 dually crew cab 350 4spd 2wd
83 K5 6.2 diesel plow truck
98 3500HD 6.5L turbo diesel NV4500 going to be extend cab with 6V-53T, ZF 6spd and Mitchell aux. overdrive

Lots of parts trucks to keep the fleet going
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