C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Delco water pump

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Old Feb 4, 2013 | 10:37 AM
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Default Delco water pump

Researching LT4 water pumps I ran on to something. A/C Delco markets two levels apparently. Anyone know what the difference is?

Professional series part # 88926213
Gen A/C delco part # 12527739
PS is much cheaper but comes in a very similar A/C Delco box.

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Old Feb 4, 2013 | 11:47 AM
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#88926213 ($106.79) has a Cast Iron Impeller and #12527739 ($207.99) has an O.E. Stamped Steel Impeller.

Last edited by GKK; Feb 4, 2013 at 11:50 AM.
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Old Feb 4, 2013 | 02:12 PM
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Originally Posted by GKK
#88926213 ($106.79) has a Cast Iron Impeller and #12527739 ($207.99) has an O.E. Stamped Steel Impeller.
So is the stamped steel one better for some reason, and where did you find them for that price?

Thanks
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Old Feb 4, 2013 | 04:59 PM
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I found the Waterpump at RockAuto.

ex-x-fire is correct. The Cast Impeller flows better and the Stamped Steel Impeller has Standard flow after further research.

Last edited by GKK; Feb 4, 2013 at 07:30 PM.
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Old Feb 4, 2013 | 06:02 PM
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Cast impeller is better, flows better. Less likely to corrode.
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Old Feb 4, 2013 | 10:18 PM
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I just sent back a Rockauto per say ACDelco water pump. The water pump was in an ACDELCO box but after comparing the actual water pump to the one I'm replacing (which is an original ACDELCO unit) I noticed there were no casting #'s on it and the bearings were not the same. I'm not sure what's going on but it's certainly not what I expected. I'll will be very upset if they don't reimburse me for the return shipping.
I'll post some pic's so you can draw your own conclusions.
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Old Feb 5, 2013 | 05:50 AM
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IME "professional series" parts can be open box, blemished, need to be de-burred, or some other cosmetic shortcoming that would make it less appealing on a retail shelf but have nothing what so ever to do with functionality. YMMV
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Old Mar 5, 2013 | 06:54 PM
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Originally Posted by 93LT1
I just sent back a Rockauto per say ACDelco water pump. The water pump was in an ACDELCO box but after comparing the actual water pump to the one I'm replacing (which is an original ACDELCO unit) I noticed there were no casting #'s on it and the bearings were not the same. I'm not sure what's going on but it's certainly not what I expected. I'll will be very upset if they don't reimburse me for the return shipping.
I'll post some pic's so you can draw your own conclusions.
I had this type of problem with RockAuto multiple times, wrong parts sent with high shipping charges and still tried to stick me with shipping. Had to back to CC Co to get rid of shipping charges. Had to stop using RockAuto except as last resort.
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