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Old 05-02-2011, 09:50 PM   #1
Jack Bauer
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Default Water pump leaks

Looked but couldn't find any sticky on replacing the water pump.
Is it as easy as a 1st gen SBC? (even if it's 4x as expensive). Local store has one for $182 (dayum!).
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Old 05-02-2011, 10:31 PM   #2
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Real easy. I used this thread when I did mine.

Most of it is self-explanatory but the thread does link to the torque specs for the bolts.


John
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Old 05-02-2011, 11:04 PM   #3
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Thanks. Looked at it and it looks pretty straight forward. Just haven't poked all that far into an LS motor. Can't believe this thing only has about 45k on the motor and it's already starting to leak.
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Old 05-03-2011, 02:58 AM   #4
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That is kinda odd that it's leaking that soon.
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Old 05-03-2011, 10:18 AM   #5
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I get a negative response every time I post this but Cory (Wayne Gretz) had a leak in his Z. it only had about 30k miles on it. we replaced only the gaskets and he has driven it for another 5k miles or so and there are no leaks. we believed the pump was not leaking due to the location of the leak-as it is sort of common on the LS based on research on CF. some on here say replace the pump while your there but to throw away a perfectly good pump is just stupid and wasteful. figure out where the leak is. if it is coming from the gasket area, try the gaskets first. it is a simple job so if you have to do it twice, it shouldn't be a big deal. the upside is you could save $200
just my $.02
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Old 05-03-2011, 11:53 AM   #6
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At $180 for a pump I would be game for that. But this is almost certainly the seal. I was changing out the belt and I got drips from the inside of the pulley. I've kind of been noticing this for a little while now because the belt always appears damp. Fortunately, it's still a pretty small leak but summer is coming. Crap.
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Old 05-03-2011, 12:10 PM   #7
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Quote:
Originally Posted by CD View Post
At $180 for a pump I would be game for that. But this is almost certainly the seal. I was changing out the belt and I got drips from the inside of the pulley. I've kind of been noticing this for a little while now because the belt always appears damp. Fortunately, it's still a pretty small leak but summer is coming. Crap.
You have a '97 or '98?

Good news: You can use the new style metal/silicone gaskets (NO sealant needed)

Bad news: You gotta scrape all that old paper gasket material off the block.
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Old 05-03-2011, 12:13 PM   #8
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Quote:
Originally Posted by CD View Post
At $180 for a pump I would be game for that. But this is almost certainly the seal. I was changing out the belt and I got drips from the inside of the pulley. I've kind of been noticing this for a little while now because the belt always appears damp. Fortunately, it's still a pretty small leak but summer is coming. Crap.
aaah hell. that sucks but at least you know it's the pump. good luck with the repair
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Old 05-03-2011, 12:17 PM   #9
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Quote:
Originally Posted by LoneStarFRC View Post
You have a '97 or '98?

Good news: You can use the new style metal/silicone gaskets (NO sealant needed)

Bad news: You gotta scrape all that old paper gasket material off the block.
2001 with 2004 GMPP warranty replacement motor. That's what I can't believe. Engine was replaced at 35k miles and it now has 79k miles and leaks. Very few hard miles too.
Love the car and all, but for expense and reliability, I trust my '81 more.
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Old 05-03-2011, 12:25 PM   #10
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The water pump on my low mileage '01 started leaking coolant from the shaft seal, while in winter storage, a few years ago.

I bought a new pump to replace it, but somehow the leaking stopped after I ran it the following Spring, and it's been been dry ever since.

My new pump is still sitting in it's box 3 years later.
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Old 05-03-2011, 12:29 PM   #11
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Quote:
Originally Posted by CD View Post
At $180 for a pump I would be game for that. But this is almost certainly the seal. I was changing out the belt and I got drips from the inside of the pulley. I've kind of been noticing this for a little while now because the belt always appears damp. Fortunately, it's still a pretty small leak but summer is coming. Crap.
I HOPE YOU HAVENT BOUGHT THAT PUMP YET!! I just bought a Bosch water pump from Amazon for $107.00 ,shipped! Unbeatable price for a new, brand name ,made in USA pump. As for the install, its the same as the LS1. Very easy.
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Old 05-03-2011, 12:44 PM   #12
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Haven't bought a pump yet. $107 is a dang sight better than what I'm getting locally, by about $80. I'm probably going to have to let this go for another month or so until I recover from the expense of the AC compressor.
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Old 05-03-2011, 01:53 PM   #13
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Quote:
Originally Posted by CD View Post
Haven't bought a pump yet. $107 is a dang sight better than what I'm getting locally, by about $80. I'm probably going to have to let this go for another month or so until I recover from the expense of the AC compressor.
Well I thought i would give you another option. Im usually getting my parts from either Amazon or Rock auto. Also if my memory serves, Rock Auto has a Carbone rebuilt for under $100, so it just depends on which way you want to go. As long as its not leaking big puddles you should be okay in the short term. Good luck.
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Old 05-03-2011, 02:00 PM   #14
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Quote:
Originally Posted by CD View Post
2001 with 2004 GMPP warranty replacement motor. That's what I can't believe. Engine was replaced at 35k miles and it now has 79k miles and leaks. Very few hard miles too.
Love the car and all, but for expense and reliability, I trust my '81 more.
Did you get a new water pump with the engine, or did they transfer over you original pump?
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Old 05-03-2011, 03:28 PM   #15
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Quote:
Originally Posted by DARRYLZO6 View Post
Well I thought i would give you another option. Im usually getting my parts from either Amazon or Rock auto. Also if my memory serves, Rock Auto has a Carbone rebuilt for under $100, so it just depends on which way you want to go. As long as its not leaking big puddles you should be okay in the short term. Good luck.
Thanks. Will check out.
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Did you get a new water pump with the engine, or did they transfer over you original pump?
Not sure, but I was told it was a complete crate engine.
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Old 05-03-2011, 06:33 PM   #16
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If they used your old 2001 water pump, the thermostat and water inlet housing will have a one piece design. The thermostat can not be removed separately from the housing.

Beginning in 2004, OEM water pumps included a thermostat that can be removed from the water inlet housing.

All new replacement GM water pumps are now the second design, and can be used in year C5.
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Old 06-03-2011, 03:42 PM   #17
Boodieman
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Default Location of coolant leak

If the water pump is bad, you would find coolant leaking under the waterpump bell, correct? My engine is leaking coolant it seems well below that location the best I can tell, so possibly the leak is coming from where the pump mounts to the engine block.

I have had my car up on ramps trying to determine the exact location of the leak and am still not certain of the spot, but after reading this post I am now inclined to try and just replace the water pump gaskets.

I am open to your thoughts/comments of how to best determine the exact location of my leaking LS1.

Last edited by Boodieman; 06-03-2011 at 03:46 PM.
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Old 06-03-2011, 03:42 PM
 
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