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Old 06-17-2013, 11:08 PM
towelshoot towelshoot is offline
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circulating water pump lt1 10128327 question

I have a 95 with the lt1 engine and the 10128327 circulating water pump - not the raw water pump. I need to replace (or at least rebuild it). I am finding other lt1 pumps but would like to make sure the others would work. The above number is GM.

Marine parts wants 509 - too much. I see many that are automotive and much less. Any thoughts on whether or not I can't use automotive or how I can confirm if it has a different part number?
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Old 06-18-2013, 07:31 AM
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A corvette automotive pump works fine. It has one more heater hose that you have to block off.
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Old 06-18-2013, 08:24 AM
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A water pump for a '92 Corvette will be the same, later years will have the heater port on the pump.
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Old 06-18-2013, 10:07 AM
towelshoot towelshoot is offline
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Thanks. Any idea what the part number is for those?
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Old 06-18-2013, 10:20 AM
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LT-1 water pump without heater out port: AC Delco 251-537 or GM 12529560

If you have a heater, you might use the pump with the heater port to improve the flow to the heater.
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Old 06-18-2013, 10:29 AM
towelshoot towelshoot is offline
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Thanks. Nice price $139 - ebay is showing exact same model at over $240. I don't have a heater now. Is that something I can add while I am doing this? Do I want to?

Two more: 1. Do I replace the seal on the shaft? 2. I saw I should use sealant on the bottom bolts - any particular kind?
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Old 06-18-2013, 10:53 AM
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Quote:
Originally Posted by towelshoot View Post
Thanks. Nice price $139 - ebay is showing exact same model at over $240. I don't have a heater now. Is that something I can add while I am doing this? Do I want to? Probably not, you would have to buy a heater kit and cut some holes, etc. I have one, but have never used it other than to see if it works.

Two more: 1. Do I replace the seal on the shaft? If I saw any oil leaking around the shaft I would. 2. I saw I should use sealant on the bottom bolts - any particular kind? Any thread sealant should do the job. I used Permatex thread sealant.
If you have to replace it, the seal for the shaft is available in a Felpro kit for LT-1's but is hard to find by itself. The kit is about $10, so it's not too bad.
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Old 06-18-2013, 11:11 AM
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Here is a recent thread on the topic:
http://www.mastercraft.com/teamtalk/...ad.php?t=54060
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Old 06-18-2013, 11:26 AM
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Nice topic thread. Very informative - I hadn't seen that one yet.

I will stay away from heater.

Why does everyone paint their parts with the black paint? Is that a protection thing or just for looks? Do I need to paint mine?
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Old 06-18-2013, 11:36 AM
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I think everyone paints their parts black because that is what Indmar did. The water pump is aluminum, so paint will keep it from oxidizing, but no big deal. I got a little carried away when I painted mine and sanded the ridges and then clear coated it.

You can also see the port I added for the heater.
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