Overcooling question

[Owdgit]

Yes, spotted it thanks.
I've ordered the fan and the coolant temp sensor JIC.
They recommended the Abakus one as the OE replacement, also ordered the Febi coolant sensor, £197 in total, a lot cheaper than the Eurocarparts £420 for the fan!

 

[mcbutler]

Thanks Peter, do you think there is any value in trying any different diagnostic software to drill down into the actual cause of the fault?
Not that I have any different software, just bimmerlink.

Just take it to a dealer, they can deep dive the code for you for a less than buying INSTA for example and they know how to use it correctly (not including BMW main stealers in that statement lol). Itll take a short time and the answer will be in your hand as well as some advice for free I am sure... Bite the Bullet

 

[mcbutler]

It looks like it could indeed be the cooling fan.
I decided to check the water pump was working ok and it's pumping nice and freely with a consistent stream.
Had a general nose around the fan and spotted that there was no cover over the electronics on the back of the fan, looking a bit further, the cover was lying at the bottom of the engine next to the flywheel pulley! Goodness knows how that's happened, think I'll replace the fan first of all.
See image below, weird.
Hopefully that will be the fix? Just need to work out how to remove the fan housing now

20230510_185333_resized.jpg

That cover has a rub mark on it as though the belt has touched it. Might be worth checking the belt is ok as well, it may have been damaged by the cover or it may have a piece hanging off that has 'whipped' the cover off...

 

[Owdgit]

Thanks Mark, the belt is all good, I've thoroughly checked it.
The mark is where it was against the bottom pulley, it actually looks worse on the image than it is, it's only slight.
I'm thinking the cover has come unbonded when the fan has been running full pelt for some time and it's got hot enough to loosen the bonding material causing it to fall off.
I've already ordered the replacement fan and a temp switch.
Once back together I'll see how it goes.
This is how the removed fan looks

 

[Owdgit]

New fan & temp switch fitted, errors cleared and no longer appear, just need to get it out on the road to try it now.

 

[B21]

New fan & temp switch fitted, errors cleared and no longer appear, just need to get it out on the road to try it now.

Splendid