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?????

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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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.

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.

Originally Posted by loso81

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


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