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post #1 of 13 Old 01-05-2012, 08:04 PM Thread Starter
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vortec 350 water pump question

i tried searching around but wanna double check a few things. what all water pumps will fit a 99 vortec 350? im looking for some without the heater hose outlets. its a gen 1 block so almost all 350 sbc should fit wouldnt they? i wont be running heat or anything like that its a bagged truck building just to beat on so none of thats needed. thanks


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post #2 of 13 Old 01-05-2012, 08:45 PM
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Re: vortec 350 water pump question

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Originally Posted by bmph8er View Post
i tried searching around but wanna double check a few things. what all water pumps will fit a 99 vortec 350? im looking for some without the heater hose outlets. its a gen 1 block so almost all 350 sbc should fit wouldnt they? i wont be running heat or anything like that its a bagged truck building just to beat on so none of thats needed. thanks
You can run any style pump, but you have to use the corresponding accessories. The vortec is it's own design, neither long or short pump. So if you use the vortec accessories you must use the vortec pump.

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post #3 of 13 Old 01-05-2012, 08:47 PM Thread Starter
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Re: vortec 350 water pump question

na i have a crank pulley and water pump pulley as well as a alt mount from a 70s v8. so i belive i can just use a old style long pump. just wanting to make sure. all im going to be running is crank pulley water pump and alt. no power steering or a/c or nething

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post #4 of 13 Old 01-05-2012, 10:27 PM
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Re: vortec 350 water pump question

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Originally Posted by RedNoma View Post
You can run any style pump, but you have to use the corresponding accessories. The vortec is it's own design, neither long or short pump. So if you use the vortec accessories you must use the vortec pump.
This is wrong. You can not use a vortec water pump on an early block because the vortec has an external bypass where the early small block is internal.

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post #5 of 13 Old 01-06-2012, 11:10 AM
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Re: vortec 350 water pump question

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Originally Posted by AceHaag View Post
This is wrong. You can not use a vortec water pump on an early block because the vortec has an external bypass where the early small block is internal.
Considering we're talking about a "vortec" block everything that I said is in fact correct. You can use all three style pumps on that block.

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post #6 of 13 Old 01-06-2012, 11:54 AM
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Re: vortec 350 water pump question

you need an early style pump cause with a serpentine set-up the water pump is reverse rotation. so with your old style v-belts most aftermarket water pumps or old carbed engine water pumps will fit. if you wanna save some headaches, make sure you get a year that was carbed. i can't recall any chevy v8 that were carbed and had a serpentine set-up.

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post #7 of 13 Old 01-06-2012, 10:42 PM
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Exclamation Re: vortec 350 water pump question

Quote:
Originally Posted by RedNoma View Post
Considering we're talking about a "vortec" block everything that I said is in fact correct. You can use all three style pumps on that block.
Go ahead and put an early pump on a vortec block and watch all your coolant piss onto the floor out the bypass hole that doesnt seal on the block.

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post #8 of 13 Old 01-07-2012, 12:42 PM Thread Starter
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Re: vortec 350 water pump question

from what i been told the blocks are the same vortec or not. its the heads that make it a vortec. my gen 1 vortec block is basicly the same block they been using forever. then again thats what summit and jegs told me when i was pricing stuff.

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post #9 of 13 Old 01-07-2012, 08:05 PM
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Re: vortec 350 water pump question

The blocks are initially the same from what I understood the Gen1 vortec blocks.. I have a 96-98 roller block that I used a 90s heads/ waterpump on it with serpentine setup. I am not REAL familiar with this.. but here is a pic of my 96-98 roller vortec block.


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post #10 of 13 Old 01-08-2012, 11:08 AM
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Re: vortec 350 water pump question

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Originally Posted by bmph8er View Post
from what i been told the blocks are the same vortec or not. its the heads that make it a vortec. my gen 1 vortec block is basicly the same block they been using forever. then again thats what summit and jegs told me when i was pricing stuff.
You are indeed correct. The only thing you have to worry about is pump rotation which will be decided by if it's a serpentine belt or not.

Not sure if theres a stock serpentine set up that uses a standard rotation pump or not.

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post #11 of 13 Old 01-10-2012, 02:52 AM
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Re: vortec 350 water pump question

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Originally Posted by AceHaag View Post
Go ahead and put an early pump on a vortec block and watch all your coolant piss onto the floor out the bypass hole that doesnt seal on the block.
You can tap and plug the bypass hole on early pumps.
But most likely the vortec block is just machined flat
With no hole drilled, so as long as the typical early style
Pump gaskets are used, shouldn't be any leak.

Look at the pic above. The "ear" where the bypass hole
used to be is still there, it's just not drilled for the bypass.

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post #12 of 13 Old 01-10-2012, 03:10 AM
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Re: vortec 350 water pump question

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Originally Posted by ToLows10 View Post
You are indeed correct. The only thing you have to worry about is pump rotation which will be decided by if it's a serpentine belt or not.

Not sure if theres a stock serpentine set up that uses a standard rotation pump or not.
Some 85-86 engines used a serpentine belt for the WP and alt.,
but still had V-belts for PS and AC.
No automatic tensioner was used, and WP was std. rotation.

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post #13 of 13 Old 01-10-2012, 01:32 PM
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Re: vortec 350 water pump question

Now that I think about it, many 87 SBC engines
used that setup too.

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