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Old 08-31-2019, 12:26 PM
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Alternator Replacement (DIY) 4.4i

Hi everyone. I am attempting for the first time to replace my water-cooled alternator on a 2001 x5 4.4i. Can someone please explain to me why the instructions Iím finding online state that the coolant needs to be drained first? What will happen if I just change the water cooled alternator without draining coolant?

If Iím supposed to drain the coolant first, instructions state there are 2 drain plugs. I found the one under the radiator but where is the one on the engine block and how do I tell if itís the drain plug?? Is it easy to get to? If not easy any suggestions?

Thank you
X5 DIY Beginner
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Old 08-31-2019, 03:52 PM
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I think this page should answer all your questions....

https://www.newtis.info/tisv2/a/en/e...-check/2QYZioW
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Old 08-31-2019, 03:55 PM
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And for reference, here's the page on the alternator...

https://www.newtis.info/tisv2/a/en/e...-parts/AWvK9IE
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Old 08-31-2019, 06:10 PM
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You don't need to drain from engine block. drain from Rad is good enough.
Technically... you don't really have to drain coolant.... just that if you don't, it will cause big mess of coolant once you remove the alternator.
Also, make sure you disconnect battery before you do anything.
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