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      11-20-2021, 08:16 PM   #13
SilverSlug
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Drives: 2011 M3 6MT
Join Date: Jul 2018
Location: San Francisco, CA

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Install tips:

When sliding out the fan, be careful with that driver's side cooling line nozzle… It looks brittle af, like it can break off quite easily.

I didn't want to take it off and potentially introduce air into the cooling system, and can confirm it's possible to remove/install the fan to complete the install with that line in place.

So, loosen the expansion tank cap to release the pressure from the cooling system (if engine is warm), you'll be able to really flex the little hose to put less pressure on the nozzle. This will also relieve any pressure on the big coolant hose near the pulleys to slide the fan out.

Driver's side of the fan is held in place by a press clip, while the passenger side of fan is held by a torx screw.

The torx size for the pulley bolt is a T25 (have to work in blind since you can't see into it). Be careful not to knick the interior of the radiator when you're working in there, those radiator fins bend super easily.

Finally, when you're putting the first belt on, set it into place before re-installing the idler pulley, this makes it wayy easier then having to have to squeeze it in between and potentially putting a tear in the belt.
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