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      04-12-2021, 10:09 PM   #1
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Drives: Olds 442, 650i
Join Date: Apr 2021
Location: SE USA

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More N63 oddities, turbo coolant line leak

So I just replaced the infamous turbo coolant Y deep down behind the alternator and the two Ts on top of the fabulous N63, and with the engine cover off just drove it about 30 minutes to check for leaks. Noticed quite a loud whining coming from passenger side front near alternator. This ‘fan’ sound may happen all the time but I heard it much differently with the engine cover off, and it seemed to last longer than ‘normal’ - 10 to 12 minutes. Is this N63 normal - thank you
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      04-13-2021, 09:16 PM   #2
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Drives: 2016 650 GC, E39’s, X70, X1
Join Date: Feb 2018
Location: STL

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It is normal for the Aux fan to run after the engine shuts down. Mine was running just the other day. It was 78 F outside. If I interpret your location properly as South Eastern US, then you are in a warmer climate, where this would be common.

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