LS1 to LS3 water pump conversion

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Feb 15, 2009 | 07:35 PM

weinerschizel

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From: Arizona

LS1 to LS3 water pump conversion

I'm going to put a LS3 water pump on an LS1. Has anybody on here done that before? What does it take? Is it a direct bolt on?

Thanks!

Feb 15, 2009 | 08:19 PM

vettenuts

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From: Little Rhody

Why, is the current pump bad? From what I have read, although a direct replacement it is not as well made.

Feb 15, 2009 | 08:54 PM

coanan

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Put one on my 99 LS1 vette when I did the cam change; less rotating mass.

Feb 15, 2009 | 10:11 PM

01ssreda4

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From: Turnin' Wrenches Infractions: 005

Quote:

Originally Posted by coanan

Put one on my 99 LS1 vette when I did the cam change; less rotating mass.

is it a direct bolt on and do you have a part number??

Feb 16, 2009 | 08:23 AM

weinerschizel

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Quote:

Originally Posted by vettenuts

Why, is the current pump bad? From what I have read, although a direct replacement it is not as well made.

I pulled my pump off as it was leaking. It has 100k miles on it.

Hey, coanan, how did you get the LS3 pump on your LS1? Was the pulley an issue at all?

THanks!

Feb 16, 2009 | 04:25 PM

coanan

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Quote:

Originally Posted by weinerschizel

I pulled my pump off as it was leaking. It has 100k miles on it.

Hey, coanan, how did you get the LS3 pump on your LS1? Was the pulley an issue at all?

THanks!

Found it on Ebay, back in March paid 100.00 for it.
http://stores.ebay.com/Southern-Performance-Systems
off a LS3 crate motor, the pulley is narrower, less than half of what my LS1 was; that was the only difference. Now what I can't tell you is if the F-body and the Vette use the same water pump.

Feb 17, 2009 | 09:32 AM

weinerschizel

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From: Arizona

Interesting. Yeah I just bought a LS3 style pump with an LS1 style bell pulley. It's for my 99 vette.

I'm sure it will work cause they're the exact same pulley. However, it would be interesting to know if the narrower pulley would fit. Cause those are about 1/3 the price to get the same water pump with the narrower pulley