335is Exhaust Rattle on Start Up

Barefoot-335is · 01-01-2017, 04:28 PM

The Known 335is Exhaust Rattle on start up is really getting on my nerves.
I love the way the car sounds once it is warmed up but the rattle on start up just sucks.

I was wondering if I could buy a Passenger side 335is Muffler and just flip it over and then somehow bypass the Drivers Side stuff that causes the rattle in the first place???

I don't have access to a lift to try to figure out myself so I thought I would ask here.

boostE92d · 01-01-2017, 05:07 PM

I turn on cold start noise reduction on MHD to make it stop rattling on mine. You could also pull the vacuum line off the valve actuator on the muffler and plug it (search: golf tee mod). Either one will be signifigantly cheaper than getting another muffler.

nanceman · 01-01-2017, 07:38 PM

Disconnect the exhaust valve solenoid sender in the left side of the trunk behind the removable panel. Will leave it in open mode all the time.

jwebb335xi · 01-01-2017, 10:26 PM

Quote:

Originally Posted by nanceman

Disconnect the exhaust valve solenoid sender in the left side of the trunk behind the removable panel. Will leave it in open mode all the time.

Very, very easy; probably take a total of 90 seconds....

Mr. Tasty · 01-02-2017, 08:44 AM

Quote:

Originally Posted by jwebb335xi

Very, very easy; probably take a total of 90 seconds....

and by 90 seconds, he means 5 seconds.

jwebb335xi · 01-02-2017, 09:02 AM

Quote:

Originally Posted by Mr. Tasty

Quote:

Originally Posted by jwebb335xi

Very, very easy; probably take a total of 90 seconds....

and by 90 seconds, he means 5 seconds.

Barefoot-335is · 01-02-2017, 01:16 PM

I just did this, I thought this would make it too loud.
That is why I hadn't done it earlier but I like it now, Thanks!!!!

rhm135 · 01-02-2017, 01:30 PM

I just welded the valve in the open position on my car. Problem solved.

Dill12 · 03-20-2017, 11:24 AM

Quote:

Originally Posted by jwebb335xi

Very, very easy; probably take a total of 90 seconds....

Can someone advise what this looks like? Want to make sure I'm disconnecting the correct wires.

Mr. Tasty · 03-20-2017, 11:32 AM

Quote:

Originally Posted by Dill12

Can someone advise what this looks like? Want to make sure I'm disconnecting the correct wires.

it's the only electrical clip harness in the driver's side rear tailight removable panel.

Dill12 · 03-20-2017, 11:41 AM

Quote:

Originally Posted by Mr. Tasty

it's the only electrical clip harness in the driver's side rear tailight removable panel.

Perfect, thanks dude.

01-01-2017, 04:28 PM	#1
Barefoot-335is First Lieutenant 63 Rep 307 Posts Drives: 2012 335is Coupe Join Date: Aug 2010 Location: Barefoot Beach iTrader: (0)	335is Exhaust Rattle on Start Up The Known 335is Exhaust Rattle on start up is really getting on my nerves. I love the way the car sounds once it is warmed up but the rattle on start up just sucks. I was wondering if I could buy a Passenger side 335is Muffler and just flip it over and then somehow bypass the Drivers Side stuff that causes the rattle in the first place??? I don't have access to a lift to try to figure out myself so I thought I would ask here.
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01-01-2017, 05:07 PM	#2
boostE92d Private First Class 61 Rep 174 Posts Drives: 12' 335is Join Date: Jul 2012 Location: Houston,TX iTrader: (0)	I turn on cold start noise reduction on MHD to make it stop rattling on mine. You could also pull the vacuum line off the valve actuator on the muffler and plug it (search: golf tee mod). Either one will be signifigantly cheaper than getting another muffler.
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01-01-2017, 07:38 PM	#3
nanceman First Lieutenant 91 Rep 346 Posts Drives: 11 335is 6MT, 15 GTI 6MT Join Date: Jun 2013 Location: Metro Detroit iTrader: (0)	Disconnect the exhaust valve solenoid sender in the left side of the trunk behind the removable panel. Will leave it in open mode all the time. __________________
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01-02-2017, 01:16 PM	#7
Barefoot-335is First Lieutenant 63 Rep 307 Posts Drives: 2012 335is Coupe Join Date: Aug 2010 Location: Barefoot Beach iTrader: (0)	I just did this, I thought this would make it too loud. That is why I hadn't done it earlier but I like it now, Thanks!!!!
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01-02-2017, 01:30 PM	#8
rhm135 Private First Class 16 Rep 168 Posts Drives: 2012 335is DCT Join Date: Nov 2013 Location: BMW of South Atlanta iTrader: (0)	I just welded the valve in the open position on my car. Problem solved. __________________ 2012 335is DCT - JB4 - MHD - Fuel-it! - DocRace
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