BMW 1-Series Forum (F20) 135i - 1Addicts.com - View Single Post

phil3103 · 01-16-2013, 05:47 PM

Hi

In the cold weather I noticed this morning that my M135 appears to channel everything through the right hand exhaust for about a minute or so when starting up in the morning. It then reverts to both tubes. You can see it clearly in the cold mornings as the fumes come out.

So there must be some sort of valve? Also makes the noise very different at start up. Which is lovely.

Anyone else noticed this?

01-16-2013, 05:47 PM	#1
phil3103 Private First Class Drives: E90 Join Date: May 2011 Location: Sussex Posts: 183 iTrader: (0)	M135 exhaust question / observation Hi In the cold weather I noticed this morning that my M135 appears to channel everything through the right hand exhaust for about a minute or so when starting up in the morning. It then reverts to both tubes. You can see it clearly in the cold mornings as the fumes come out. So there must be some sort of valve? Also makes the noise very different at start up. Which is lovely. Anyone else noticed this?
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