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LT1 water pump

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Old Aug 2, 2024 | 03:45 PM
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Default LT1 water pump

I need a new water pump for a restored, number matching LT1 so I am looking for the correct part.

1.) is the original water pump cast iron or aluminum?

2.) thoughts on sourcing? Corvette central is no longer offering rebuilds, EBay? There are couple Refurbished being offered but I have no experience with vendors on ebay.

any guidance would be appreciated

thank you all,
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Old Aug 2, 2024 | 05:31 PM
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Originally Posted by Johng823
I need a new water pump for a restored, number matching LT1 so I am looking for the correct part.

1.) is the original water pump cast iron or aluminum?

2.) thoughts on sourcing? Corvette central is no longer offering rebuilds, EBay? There are couple Refurbished being offered but I have no experience with vendors on ebay.

any guidance would be appreciated

thank you all,
years are not the same
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Old Aug 2, 2024 | 07:27 PM
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Default LT1 Water Pump

My apologies, my LT1 is a 1971 model year
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Old Aug 2, 2024 | 10:17 PM
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Try ChevyCool, they rebuild/restore/sell classic water pumps and starters. 480-720-8000, ChevyCool@msn.com. No personal experience but they seem to have a good reputation.
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Old Aug 2, 2024 | 10:45 PM
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If you decide to have your water pump restored, make sure that it is an OEM unit, with the correct date code. My stock 73 needed a new water pump and I just ordered a new Delco unit from Summit. I figured the one I replaced was not the original, since it would have been over 40 years old. Where is the part number / date codes located? I am a hoarder, so I still have the water pump that was removed. I know my car had a service replacement alternator dated 1976, and I bought a restored alternator with the correct model / date code.
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Old Aug 3, 2024 | 10:59 AM
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The date code and part number should be cast into the pump - the ones I've seen are on the fan side of the pump. If you post a couple pics of the pump and any numbers cast into it we can help decode it. That said, some aftermarket pumps don't have any numbers cast in. In that case, it's 99.937% assured to not be a GM pump and you can just recycle it.
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Old Aug 3, 2024 | 11:09 AM
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If the water pump is original to the car, just rebuild it yourself. Toughest part is pressing the old bearing out and the new bearing in. I'm sure a local machine shop could do that.


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Old Aug 3, 2024 | 12:03 PM
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As already mentioned in post 4, ChevyCool, ChevyCool@msn.com is in the NCRS publication Driveline.
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I’ve also heard recently that Arthur Gould Rebuilders rebuilds water pumps as well. agrebuilders.com.
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