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      01-27-2020, 12:10 PM   #17
msalisbu
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Drives: 2023 m340i
Join Date: Aug 2019
Location: Chicago

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Quote:
Originally Posted by Asterix View Post
To my knowledge the valve is closed for a couple of minutes to warm up quicker - so if keeping the valve open has an impact on the sound it should be with cold engine only ? Did I miss something?
Correct. At certain temps after a cold start, the valve will remain closed in sport mode until the engine reaches a desired temp. You can very clearly hear it pop open/closed after a minute or two.
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