[Gregor21]

Hello!
First of all hello to everyone i am new to BMW family and already found one issue which i cant discover! 😊
I own bmw e90 330xi with 130.000km(N52) and when i bought it i changed few things( oil, filters, tensioner+belt, trans fluid and few minor things! Everything was working perfectly untill few days ago come this annoying whine sound from driver’s side! I checked everything car is running normal (no power loss)!
Whine comes between 1000-2000rpm the most! I assume maybe there are some of pulleys?
Or it can be something else maybe disas, pcv valve?
Videos are attached below in the links

So i hope you guys maybe can help me diagnose this annoying problem because in next few days i will do whole service and i hope i will found a problem untill then!

http://vimeo.com/424634941
http://vimeo.com/424634426
http://vimeo.com/424634799

Regards Grega

[hassmaschine]

low power steering fluid?

[ewicky]

I had a noise very similar to this. Ended up being the oil filter. Yes, I know that makes no sense but really, it was. If you search enough around you'll find other people who also replaced the oil filter and nothing else and it was fixed instantly. Definitely a cheap and easy thing to try.

[Gregor21]

Originally Posted by hassmaschine

low power steering fluid?

Checked power steering fluid and its almost on minimum i will just add the fluid to max and hope noise will go away. But i will change whole system when ill be doing oil and filter change����

[Gregor21]

Originally Posted by ewicky

I had a noise very similar to this. Ended up being the oil filter. Yes, I know that makes no sense but really, it was. If you search enough around you'll find other people who also replaced the oil filter and nothing else and it was fixed instantly. Definitely a cheap and easy thing to try.

Agree! I checked several videos, of course noise cant be the same but its very similar and definitely will be the first thing to do. I will keep you guys posted where is the problem because i will change things one by one. At some point noise needs to go away and i will know where was the problem����
And i will change disas and pcv for prevention and i guess cant be bad for engine. Also i believe that disas, vanos, pcv was not changed.

[smass]

My AC makes a similar noise. Does it go away when you press the snow flake button to turn of the AC? If not a mechanics stethoscope will find it quickly. I did have minor noise from my idler pullies which are on the drivers side.

[Gregor21]

Originally Posted by smass

My AC makes a similar noise. Does it go away when you press the snow flake button to turn of the AC? If not a mechanics stethoscope will find it quickly. I did have minor noise from my idler pullies which are on the drivers side.

Unfortunately yes i do have whining noise when A/C is on. But when i turn it off goes quiet but noise from the video stays so its not A/C.
Agree, tried the “old way” with screwdriver.. no luck. But like i mentioned now i am waiting for parts to arrive and i will change what i think its the problem ( oil, filters, pulleys, disa’s, pcv and power steering fluid). I am almost sure one of the things went or it will go bad.

[smass]

The screwdriver is hard to use for a noise that is not loud. I use something like this. https://www.amazon.com/Lisle-52750-S...YSM/ref=sr_1_3

And some people have fixed the AC noise by recharging the freon. Or by doing a full evacuation and recharge.

[Gregor21]

Originally Posted by smass

The screwdriver is hard to use for a noise that is not loud. I use something like this. https://www.amazon.com/Lisle-52750-S...YSM/ref=sr_1_3

And some people have fixed the AC noise by recharging the freon. Or by doing a full evacuation and recharge.

Ok super thank you i think my friend has one of these and we will check it in saturday

About the A/C didnt consider to recharge it because its cooling like crazy but will check that also!
Thank you very much

[Gregor21]

UPDATE!
Today i went to check few things, ending up to take off manifold. Seems that pcv is more or less working normal. Need to say there was little bit of oil inside the manifold but nothing to serious so i guess pcv valve is okay.
And of course I checked both of disas and little one is perfectly fine while the big one it’s totally loose! At first i didnt saw no metal pin on the top and i got really scared that maybe fell inside but disas was changed already and it was not original bmw.. so both of them has no metal pin!
Tomorrow ill go get new disa put everything back together and i hope noise will go away. I will keep you guys posted
And do you guys think it would be smart to replace pcv and hoses also?
http://vimeo.com/426797620

[Clammy]

Originally Posted by Gregor21

UPDATE!
Today i went to check few things, ending up to take off manifold. Seems that pcv is more or less working normal. Need to say there was little bit of oil inside the manifold but nothing to serious so i guess pcv valve is okay.
And of course I checked both of disas and little one is perfectly fine while the big one it’s totally loose! At first i didnt saw no metal pin on the top and i got really scared that maybe fell inside but disas was changed already and it was not original bmw.. so both of them has no metal pin!
Tomorrow ill go get new disa put everything back together and i hope noise will go away. I will keep you guys posted
And do you guys think it would be smart to replace pcv and hoses also?
http://vimeo.com/426797620

Since you have the manifold off, and the car has a decent amount of kms on it, I would change the CCV and all associated hoses. I have an 06 330i (with about 215,000 kms on her), and am planning on doing that this summer. While I'm doing that, I will be checking the condition of my DISAs as well.

Cheers!

[Gregor21]

Originally Posted by Clammy

Since you have the manifold off, and the car has a decent amount of kms on it, I would change the CCV and all associated hoses. I have an 06 330i (with about 215,000 kms on her), and am planning on doing that this summer. While I'm doing that, I will be checking the condition of my DISAs as well.

Cheers!

You are right today i went to order disa and ccv so i hipe tomorrow will be good weather so i can work( unfortunately dont have garage)
I also took apart old ccv and just for knowledge i will post few picture of inside!
Car has 135.000 km

[Clammy]

Originally Posted by Gregor21

You are right today i went to order disa and ccv so i hipe tomorrow will be good weather so i can work( unfortunately dont have garage)
I also took apart old ccv and just for knowledge i will post few picture of inside!
Car has 135.000 km

That looks really crudded up, but I've never seen the inside of one of these, so it may be perfectly normal. Replacing it is good preventative maintenance, IMHO.

Cheers!

[Gregor21]

Originally Posted by Clammy

That looks really crudded up, but I've never seen the inside of one of these, so it may be perfectly normal. Replacing it is good preventative maintenance, IMHO.

Cheers!

Need to say that me neither but after some researchers i guess its clogged up alot.
So now i will put everything together and see if the disa was problem for whinning noise!
Will keep you guys posted!

[Gregor21]

Howdy guys so first thing first i solved the “whining” problem.. it was disa!
Of course because i had the manifold of i changed CCV + all the hoses( it was pain in the @ss) after i started slowly to assemble everything back together.. took me some time because i was doing it alone but after few hours i got car back together
And when I wanted to start up the car.. heh nothing happened, all the control lights came on i hear starter and fuel pump doing its thing but no crank.
I checked the fuses, relay, battery everything possible!
And i already didnt know what to do and i try the one last possible thing(check if some cable was accidentally disconnected)
I took away motor air filter housing and pipe all the way to throttle and luckily i saw one male pin laying on the bottom of an engine! Plug that back inside and car started
And after test drive i need to say car is much more responsive and driving well without and whining sounds!
So we can say problem solved!
Thank you guys for all the help! I appreciate it

[KADAVER]

Hi, @Gregor21 , can you confirm that finally the root cause was the DISA? Please let me know, because I checked them, but I still havin the same noise!

Thanks!