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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 01-14-2013, 03:09 PM
loso81 loso81 is offline
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Mein Auto: 335i
Rattle noise

ive noticed that sometimes if i rev my car while in park i hear a "rattle" noise, could that noise possibly be coming from something dealing with the exhaust?????
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  #2  
Old 01-14-2013, 11:01 PM
sptt144 sptt144 is offline
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Mein Auto: 2009 335i
Those are your wastegate actuators if you have a 335. The actuators (open and closing rods) are loose in the gates and will rattle (search YouTube). Just had mine replaced at dealer last week. They have newer upgraded parts. Now I don't hear it anymore.

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Old 01-15-2013, 08:06 AM
DT335 DT335 is offline
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Mein Auto: '08 Monaco Blue E90 335i
loso,

I had to replace my vacuum lines to eliminate that waste gate rattle. I never had to replace the actuators. You might want to check with a mechanic, first.
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'08 E90 335i | Monaco Blue | iDrive | PP

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Old 01-15-2013, 09:40 AM
Greatdane84 Greatdane84 is offline
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Mein Auto: 09' 335i Sedan
Loso,

I just got an 09' 335i, and occasionally I was hearing the left exhaust on startup. The actuator which controls the butterfly valve was causing this and I simply disconnected the actuator from the trunk area so my valve is always open. Yet to hear the noise again.

You can search for "golf tee mod" and find a lot of results about this.
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Old 01-15-2013, 11:51 AM
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CALWATERBOY CALWATERBOY is offline
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Mein Auto: 2009 E93 N54
Quote:
Originally Posted by loso81 View Post
ive noticed that sometimes if i rev my car while in park i hear a "rattle" noise, could that noise possibly be coming from something dealing with the exhaust?????

Without a doubt.

Most things are possible.

Search suggestion: Exhaust Rattle


.

Last edited by CALWATERBOY; 01-15-2013 at 11:53 AM.
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