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| 05-06-2013, 12:53 PM | #1 |
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Captain
 
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[VIDEO] Wastegate or exhaust flap metallic noise?
My 135 makes the same sound as this 335 on cold starts. It's a loud metallic chatter a second or so after the engine starts. It has always done it since I bought it (used). The YouTube poster says it was the wastegate but I always thought it was the exhaust flap. I don't seem to hear any rattles when I rev the engine. What do you guys think?
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| 05-06-2013, 01:09 PM | #2 |
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They like my Swag...
433
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Drives: 15 GSM 435i GC
Join Date: Aug 2008
Location: South Dakota
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Mine always does it as well (along with every other one I've heard). Music to my ears!
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 2015 435i Gran Coupe - Current 2008 AW 135i - Sold |
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| 05-06-2013, 01:24 PM | #3 |
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Alice in Wonderland
6
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Drives: 2012 135i e88
Join Date: Apr 2013
Location: Glendale,CA
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That's normal to me also (from what I can remember) If it starts doing that while driving then it would be an issue.
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| 05-06-2013, 01:48 PM | #4 |
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Colonel
 
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try disconnecting turbo vacuum hoses from vacuum banks see if you have same sound if yes that means your wastegates are fine... Somewhere Dackel has posted DYI for that.
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