[marc5000]

Hello - I hope I have the right sub-forum? Please excuse me if not.

I've had a 2015 435i pre-lci since March this year; great car - wonderful engine; and a great upgrade from the 420i - with better fuel consumption..(what's up with that?)

ANYWAY; My issue relates to the left exhaust valve - when I've driven the car (fairly hard), sport manual - after about 30 mins or so the left valve makes a squeaking noise; as if the metal or mechanism has expanded and rubbing.
While I would expect just a 'click' or a normal valve close sound; I really didn't expect this to be an issue!

Here is a video of the problem;

Hopefully someone can point me in the right direction with any advice?

Thanks
Marc

[floydarogers]

Originally Posted by marc5000

...
I've had a 2015 435i pre-lci since March this year; great car - wonderful engine; and a great upgrade from the 420i - with better fuel consumption..(what's up with that?)

ANYWAY; My issue relates to the left exhaust valve - when I've driven the car (fairly hard), sport manual - after about 30 mins or so the left valve makes a squeaking noise; as if the metal or mechanism has expanded and rubbing.
While I would expect just a 'click' or a normal valve close sound; I really didn't expect this to be an issue!

Here is a video of the problem; <video>

Hopefully someone can point me in the right direction with any advice?

Well, it's not the "valves", which are internal to the engine.
Sounds to me like the linkage for the blow-off valve, or something associated with idling. Weird sound, for sure.

[xantdieselx]

Originally Posted by marc5000

Hello - I hope I have the right sub-forum? Please excuse me if not.

I've had a 2015 435i pre-lci since March this year; great car - wonderful engine; and a great upgrade from the 420i - with better fuel consumption..(what's up with that?)

ANYWAY; My issue relates to the left exhaust valve - when I've driven the car (fairly hard), sport manual - after about 30 mins or so the left valve makes a squeaking noise; as if the metal or mechanism has expanded and rubbing.
While I would expect just a 'click' or a normal valve close sound; I really didn't expect this to be an issue!

Here is a video of the problem;

Hopefully someone can point me in the right direction with any advice?

Thanks
Marc

Sounds like you have a bad exhaust valve. One way to check is to put it in Sport/Sport+ make sure the valve is open and unplug the vacuum line to it. If the noise goes away you know it's the valve.

I had a fault exhaust valve on my M235i. There was a TSB on it and the dealer replaced it at around 7k. Mine was making a rattling noise at times when cold. The problem is gone with the new valve.