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 Post subject: Cast iron water pump.
PostPosted: Thu May 02, 2019 2:07 pm 
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Can any one tell me what a 12G 1772 cast iron water pump is for? Obviously not a Cooper S, I already know that!


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PostPosted: Thu May 02, 2019 2:18 pm 
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ianscampbell wrote:
Can any one tell me what a 12G 1772 cast iron water pump is for? Obviously not a Cooper S, I already know that!
These guys reckon its a Cooper S pump. But the actual part number is 12G1771 or GWP102. https://m.ebay.com.sg/itm/CLASSIC-MINI- ... SwivlcfmSn


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PostPosted: Thu May 02, 2019 4:13 pm 
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What is the difference between 12G1772 & 12G1771?


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PostPosted: Thu May 02, 2019 4:26 pm 
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cooperess wrote:
What is the difference between 12G1772 & 12G1771?

It may be the same item.

The number cast/embossed/stamped in a BMC part may not be the final number for the part. Sometimes several different parts with their own unique part number can result from the same casting after subsequent machining or rework.

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PostPosted: Thu May 02, 2019 4:35 pm 
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winabbey wrote:
cooperess wrote:
What is the difference between 12G1772 & 12G1771?

It may be the same item.

The number cast/embossed/stamped in a BMC part may not be the final number for the part. Sometimes several different parts with their own unique part number can result from the same casting after subsequent machining or rework.


Yes - Thats what I was thinking.

If 12G1771 is the complete assy, 12G1772 could be the body and 12G1773 the impeller.

Ian - What makes you think it won't fit a Cooper S?


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PostPosted: Thu May 02, 2019 8:41 pm 
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Macka, - I don't see any reason that it wouldn't fit, but I don't want to buy one & find out it's incorrect, especially after an expensive refurbishment!

Thanks all for the replies!


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PostPosted: Thu May 02, 2019 8:46 pm 
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ianscampbell wrote:
Macka, - I don't see any reason that it wouldn't fit, but I don't want to buy one & find out it's incorrect, especially after an expensive refurbishment!

Thanks all for the replies!


The parts manual I have is for UK cars and they quote the smaller water pump 12G120. Sorry I cant be of more help. Maybe someone else has a later parts book and can check the number.


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PostPosted: Thu May 02, 2019 9:25 pm 
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Thanks Macka, - That's where I am at the moment, thinking it should be the 12G120 according to my UK parts book, but the book predates my car by a long way!


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PostPosted: Thu May 02, 2019 9:43 pm 
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12G1771 was one of the part numbers used for the Australian Cooper S water pump according to the parts book. Sorry for scrappy scan.

Attachment:
PUB 1056M page A19.jpg


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PostPosted: Fri May 03, 2019 1:22 pm 
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That is good information Doug, & I like it, so the available part & refurbishment kit will be bought!


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