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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > Video: Engine plastic"ty rattle, 09 E90, Work whip need help.



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      07-06-2018, 11:17 PM   #1
Demz760
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Video: Engine plastic"ty rattle, 09 E90, Work whip need help.

7/12/18 "SOLVED: Was the Alternator making the noise, car is fixed now. "

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I cant figure out where this noise is coming from, check out the video and see if maybe you had the same issue or recognize what it is.

I need to get it fixed asap. I appreciate any help, Thank you.
I'm interested in DIY, strapped for cash at the moment. Where should I start?

2009 BMW 328i Sedan
102,XXX miles

Is this A/C related?
Seems to be coming from under the engine cover.
SES light is On.
Auto zone ob2 didnt pull any codes.

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Last edited by Demz760; 07-12-2018 at 11:44 PM.
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      07-07-2018, 06:20 AM   #2
Saico
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If you have DISA valve (not sure) - check if its not broken.
Best way to know is to use Carly or INPA and pull engine code.
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      07-07-2018, 10:33 AM   #3
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Plastic engine cover? tighten the 4 allen screws?
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      07-08-2018, 01:36 AM   #4
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Quote:
Originally Posted by Saico View Post
If you have DISA valve (not sure) - check if its not broken.
Best way to know is to use Carly or INPA and pull engine code.
I don't think I have the 3 stage manifold, but I do see two boxs on the manifold that could be DISA.

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Originally Posted by 3.1L Z View Post
Plastic engine cover? tighten the 4 allen screws?
Checked that, they were tight.

I have to wait until Friday for payday, to get it to an indie shop, think its safe to drive for the week?
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Last edited by Demz760; 07-11-2018 at 03:43 AM.
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      07-08-2018, 11:24 AM   #5
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Try and install new oil filter.
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      07-09-2018, 01:38 PM   #6
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I had a similar problem with My AC Pulley.

The bearing was shot.

https://imgur.com/a/llb9osN

What lead me to that was i took the drive belt off so I could see if the noise was driven by the belt.

Then I got a shorter belt to bypass the ac compressor to see if it was the alternator or not.

I got the pulley off ebay and I got a denso removal tool. Total repair was 100 but took me a week of messing with it.


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      07-11-2018, 03:41 AM   #7
Demz760
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I checked the oil filter, as Iíve seen in other post/videos. A similar sound, but itís all good, filter it almost OEM. Lol thank for the post though!!!


Quote:
Originally Posted by Pilarskica View Post
I had a similar problem with My AC Pulley.

The bearing was shot.

https://imgur.com/a/llb9osN

What lead me to that was i took the drive belt off so I could see if the noise was driven by the belt.

Then I got a shorter belt to bypass the ac compressor to see if it was the alternator or not.

I got the pulley off ebay and I got a denso removal tool. Total repair was 100 but took me a week of messing with it.


Thank you so much! Iíve seemed to narrow it down to the AC pulley, Iím pretty sure because Iíve used my AC more this summer then Iíve used in the past 5 years of owning the car. Global warming is real in the desert....

Anyway I donít have the time to diy due too (abnormal) extensive work hours this month. So I bit my tongue and got a rental car, my precious bmw sits at at bmw indie shop at the moment.

Iíll update with the final diagnosis so maybe someone else will find this post extremely useful (life saving) in the future.

Thanks again BOSS!

Last edited by Demz760; 07-11-2018 at 03:50 AM.
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      07-12-2018, 11:46 PM   #8
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Welp I was totally wrong... but close...
Was the Alternator making the noise, replaced as well as the belt, car is fixed now.
I forgot how low my car is and how heavy the steering is!
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      07-12-2018, 11:56 PM   #9
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Love the steering in these cars, man...
Every time I move my ladies car: "yuck"... hahaha
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