[Eraaz]

Hi everyone,

First of all, sorry for any mistakes i will do, I'm french and there is not many help on french sites, so I'm coming on yours.

Yesterday I heard a strange sound from my engine, here is a video

https://www.youtube.com/watch?v=4Dd5eIP6vgM

Is it normal for you ?

And when I turn off the engine, there is a little squeak like this

https://www.youtube.com/watch?v=ToocjekO6C4

Do you have any suggestions ?

Thanks.

[Eraaz]

Here is a video where you can hear better
https://www.youtube.com/embed/gKvf6w5MDKc

[No one]

There are two famous sounds from this engine (both appear defeated by Andoni.F20 ):

1. Rattle (turbine's heat shield): https://f20.1addicts.com/forums/show...#post19712176;
   
2. Ticking/knocking (ignition coil): http://f20.1addicts.com/forums/showt...1#post21520881.

Regarding the squeak I guess I hear it from mine. Never even thought of worrying. Not even sure I do hear it, but somehow I guess so.

[Eraaz]

Originally Posted by No one

There are two famous sounds from this engine (both appear defeated by Andoni.F20 ):

1. Rattle (turbine's heat shield): https://f20.1addicts.com/forums/show...#post19712176;
   
2. Ticking/knocking (ignition coil): http://f20.1addicts.com/forums/showt...1#post21520881.

Regarding the squeak I guess I hear it from mine. Never even thought of worrying. Not even sure I do hear it, but somehow I guess so.

Thank you, for your answer.
For the sound of the first video, you right it come from the turbo heat shield, I will tight the bolts.
But for the squeak it look like it's coming from the Accessory belt. I'm a little bit worried about it.

[No one]

Originally Posted by Eraaz

But for the squeak it look like it's coming from the Accessory belt. I'm a little bit worried about it.

Is there an accessory belt? AFAIK everything is electric in this car.

Thanks for clearing my doubts about alternator, by the way: it does/can work when the car stands with the engine running, of course! The car once told me the opposite: "The battery is weak, set off immediately!". That made me wonder. You know their "energy recuperation" story. On the one hand, does the brake energy recuperation only work when coasting in a gear (engine braking)? Saving only the driving wheels brakes. Why did they advertise it as a (part of the) new technology then? On the other hand, they appear to suggest the alternator is "detachable" (despite the belt drive?) to reduce the engine burden. And it does make sense when you stop the engine (to ease the start). Just for example.

There was a similar thread (a different engine): https://f20.1addicts.com/forums/show....php?t=1335471. DomMuc should know.

[Eraaz]

Yes there is an accessory belt, I can see it if I am leaning.
If I remove it, can I start the engine to see if thats comes from there ?

[No one]

Originally Posted by Eraaz

Yes there is an accessory belt, I can see it if I am leaning.
If I remove it, can I start the engine to see if thats comes from there ?

It's said it drives the alternator and the "water" pump. So it should be safe to start a cold engine only briefly, I suppose. Just don't expect a Check Control message to warn you that the engine is too hot: as the coolant won't run it may not reflect the engine temperature correctly.

Fell free to call a service with this simple question, just to make sure.

[Eraaz]

Originally Posted by No one

It's said it drives the alternator and the "water" pump. So it should be safe to start a cold engine only briefly, I suppose. Just don't expect a Check Control message to warn you that the engine is too hot: as the coolant won't run it may not reflect the engine temperature correctly.

Fell free to call a service with this simple question, just to make sure.

I will try this soon, I don't really know if it's easy on the F20

[Eraaz]

Hi, I've record a video of the rattle sound
https://www.youtube.com/watch?v=hNyzd0JqspI

So it come from the turbo. But it's not the bolts.
It look like there is a missing clamp at the bottom where it met the exhaust.

Do you know how can I fix this ?

Thanks.

[No one]

From the video it still looks like the suggested method of slightly deforming the heat shield by hand should not be overlooked.

Otherwise you might want to look underneath (there's some "vibration absorber", #7, that might be failing): https://www.realoem.com/bmw/enUS/sho...diagId=11_5017.

Addressing a service could help as well.