Ls1 VS Ls2 Waterpump height differences
#1
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I bought a 90MM Edelbrock throttle body and I really like it, I am going to run it for sure. I would rather just sell my waterpump and buy a new one that will clear the TB but I'm not sure on the height difference where I need it to be. I will consider any waterpump that will clear.
I don't have the money for an electric as much as I would like to go ahead and buy one now.
Place I need to sit lower:
![](http://i250.photobucket.com/albums/gg259/xhk651/2013-01-21005027.jpg)
It is at the top "neck" right under the blade. It doesn't have much to clear it just enough to keep it from closing.
Any and all information is appreciated.
I don't have the money for an electric as much as I would like to go ahead and buy one now.
Place I need to sit lower:
![](http://i250.photobucket.com/albums/gg259/xhk651/2013-01-21005027.jpg)
It is at the top "neck" right under the blade. It doesn't have much to clear it just enough to keep it from closing.
Any and all information is appreciated.
#2
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That's the old style GM water pump that you have and you need the new style: ACDELCO Part # 251744 (GM part #19256263). You can see the difference, (no round protrusion sticking up) but it's more expensive; $169.79.
![](https://ls1tech.com/forums/attachments/generation-iii-external-engine/389128d1359194520-ls1-vs-ls2-waterpump-height-differences-1.jpg)