Bogus left tailpipe?

BMWZ4 · 11-16-2011, 08:59 AM

The other morning was a bit cooler and noticed, while the car was running in my driveway, that the left tailpipe had no exhaust (smoke) coming out. I put my hand up on the left tailpipe and surprisingly, nothing was coming out, unlike the right tailpipe.

I read an article just yesterday in "Bimmer" and funny enough, there was a question posted by an "E Series" owner who noted the same thing. The response was and I'm paraphrasing here; the left tailpipe only kicks in at 2,000rpm.....

Weird. I never knew that. Learn something knew everyday as they say.

colson79 · 11-16-2011, 09:36 AM

It's been talked about on this forum before. Basically the 35i has an valve on the exhaust system that allows the system to open up under full throttle for better performance.

check out the Post from Lotus7 in this tread if you want a better explanation: http://x3.xbimmers.com/forums/showthread.php?t=611332

Beyu · 11-16-2011, 09:54 AM

You should check out this thread, especially post #7, it's got pictures!

http://x3.xbimmers.com/forums/showthread.php?t=588345

11-16-2011, 08:59 AM	#1
BMWZ4 Major General 1910 Rep 5,102 Posts Drives: '23 X1/'23 Allroad Progressiv Join Date: Apr 2010 Location: Toronto iTrader: (1)	Bogus left tailpipe? The other morning was a bit cooler and noticed, while the car was running in my driveway, that the left tailpipe had no exhaust (smoke) coming out. I put my hand up on the left tailpipe and surprisingly, nothing was coming out, unlike the right tailpipe. I read an article just yesterday in "Bimmer" and funny enough, there was a question posted by an "E Series" owner who noted the same thing. The response was and I'm paraphrasing here; the left tailpipe only kicks in at 2,000rpm..... Weird. I never knew that. Learn something knew everyday as they say. __________________ '11 Z4 30i (retired);'11 X3 28i (retired); '15 M235i Stage 1 Dinan (recalled & crushed); '16 M235i Stage 3 Dinan (retired); '15 X3 28i (retired); '14 328i (retired), 2019 X3M40i (retired); Loaded '18 X1 (retired); Loaded '20 X3MC DG, Black/Tan Merino (retired); Loaded '23 X1 Cape York green and Red/Black interior; '23 Audi A4 Allroad Progressiv
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11-16-2011, 09:36 AM	#2
colson79 Second Lieutenant 7 Rep 221 Posts Drives: 2012 X3 35i DSB Join Date: Jul 2011 Location: Wisconsin iTrader: (0)	It's been talked about on this forum before. Basically the 35i has an valve on the exhaust system that allows the system to open up under full throttle for better performance. check out the Post from Lotus7 in this tread if you want a better explanation: http://x3.xbimmers.com/forums/showthread.php?t=611332 __________________ 2012 X3 35i \| Deep Sea Blue \| Oyster \| Packages \| Sports \| Cold Weather \| Cold Weather 2 \| Premium \| Technology \| Premium Sound
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11-16-2011, 09:54 AM	#3
Beyu Lieutenant 13 Rep 579 Posts Drives: 135i Join Date: Feb 2011 Location: WA iTrader: (0)	You should check out this thread, especially post #7, it's got pictures! http://x3.xbimmers.com/forums/showthread.php?t=588345
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