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BMW E46 330Ci - Rattle (Not VANOS)

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Published on Sep 15, 2010

My 330Ci convertible has a very strange rattle coming from it. I'm pretty sure it's not the VANOS, it seems to be coming from the gap in-between the engine block and the left of the engine bay (near the exhaust heat shields. You can hear the knock clearly through the drivers side wheel. And today I noticed a new knocking sound when in the car. It sounds like a mini helicopter is hovering in my engine bay.

The car is running on shell helix fully synthetic oil put in by the crap garage who sold it to me. This may or may not be the reason for the rattle but any ideas in the comments are gratefully received.

UPDATE!

This turned out to be.....
NOTHING.
It's just the noise these cars make. It ran beautifully for another year before I sold it for my BMW M3.
My advice - If you think your 330Ci is noisy, wait until you hear an M3. Stop worrying about noises and just enjoy the car. I spent so much time worrying about the noises and didn't ever enjoy the car. I am in contact with the guy who bought it from me and it's still running with no problems... The M54B30 engine is noisy - just enjoy it and stop worrying. If anything it was the exhaust heat shield. Common noise on these cars.

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