Wastegate Rattle Question......

JDrillingJ · 09-27-2012, 04:23 PM

Comrades,

I recently installed BMS meow-less downpipes and I love 'em. At this point I am fully meow-less and running the stock mufflers (with golf tee mod).

Since install, I have noticed a rattle/metallic sound at a certain rpm and throttle pressure only. It happens around 1800 rpm and continues till 2300 rpm but only while under very slight boost.

When I'm super easy on the throttle, no sound. When I'm on the floor, nada. My exhaust guy and I have been over the car top to bottom trying to find the culprit...no luck. I know they are not touching and causing a rattle. Sound "sounds like" it is coming from behind the car....not underneath it....almost as if the sound is coming "out of the pipe" versus "from the pipe".

Thus, my questions:

Is this wastegate rattle or something in the stock muffler(s)?

Anyone else experience this or help me identify?

What can I do to cure it?

Thanks in advance,

JDJ

JYohay · 09-27-2012, 05:16 PM

i had the same thing.
sounded like it was coming out the back but open your hood or lay on the ground next the the turbo side and listen......i can hear it most when in a parking garage.

JDrillingJ · 09-27-2012, 05:18 PM

Quote:

Originally Posted by JYohay

i had the same thing.
sounded like it was coming out the back but open your hood or lay on the ground next the the turbo side and listen......i can hear it most when in a parking garage.

Did yours make the sound while driving (as I described)?

Thanks,

JDJ

JYohay · 09-27-2012, 05:23 PM

yes...sounds like a metal jumbling around....i also hear a click when the rpms drop below around 2-3K RPM

JDrillingJ · 09-27-2012, 05:38 PM

Quote:

Originally Posted by JYohay

yes...sounds like a metal jumbling around....i also hear a click when the rpms drop below around 2-3K RPM

Is there a way to get it to shut-up (without putting the cats back on) or do I need to find a way to live with it?

Cheers,

JDJ

JYohay · 09-27-2012, 05:43 PM

i def noticed it more the day after i put DPs on.
now that youve heard it you will still notice it even if you put them on.
the warranty on them just got pushed to alot higher milage.
if you cant find a dealer who will look the other way on mods, then just wait for the weather to get real bad and get them removed and take it in, its covered.

Redrkt503 · 09-28-2012, 10:27 AM

What exactly is the warranty pushed to now?

jcarv20s · 09-28-2012, 10:41 AM

82,000 miles I believe

Bakeme521 · 09-28-2012, 10:46 AM

Doesn't matter if you have a warranty and you can get the turbos replaced, it will still do it. I had mine replaced about 23k and it was doing it about a month later. Only thing that has really fixed it putting a procede on the car and fine tuning the wastegate position.

sam0329 · 09-28-2012, 11:02 AM

I own a 135i and last weekend just installed my AR Catless DP + Maddad full catback with resonators. I have exactly same noise that everybody experiencing here. Its really annoying when driving on highway here is Canada because its 100km and it land perfectly on the 1800 to 2000rpm range. I have an auto so that make things even worst. Right now I am running Cobb OTS stage 2 + FMIC and hopefully things will get better when I get a custom tune

09-27-2012, 04:23 PM	#1
JDrillingJ Private 5 Rep 76 Posts Drives: 2008 335i Join Date: Oct 2010 Location: Hot Springs, Arkansas iTrader: (0)	Wastegate Rattle Question...... Comrades, I recently installed BMS meow-less downpipes and I love 'em. At this point I am fully meow-less and running the stock mufflers (with golf tee mod). Since install, I have noticed a rattle/metallic sound at a certain rpm and throttle pressure only. It happens around 1800 rpm and continues till 2300 rpm but only while under very slight boost. When I'm super easy on the throttle, no sound. When I'm on the floor, nada. My exhaust guy and I have been over the car top to bottom trying to find the culprit...no luck. I know they are not touching and causing a rattle. Sound "sounds like" it is coming from behind the car....not underneath it....almost as if the sound is coming "out of the pipe" versus "from the pipe". Thus, my questions: Is this wastegate rattle or something in the stock muffler(s)? Anyone else experience this or help me identify? What can I do to cure it? Thanks in advance, JDJ __________________ 2008 BMW 335i Coupe - 6AT w/ Paddles - Black on Black - Dark Burl Walnut - 19"s - Aero -ColdWeather - Premium - Sport - Navigation - iPod - JB4 - BMS DCI - Michelin PSS - Dual Exhaust Mod
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09-27-2012, 05:16 PM	#2
JYohay Banned 48 Rep 2,009 Posts Drives: 2011 X5 Join Date: Mar 2012 Location: NY iTrader: (3)	i had the same thing. sounded like it was coming out the back but open your hood or lay on the ground next the the turbo side and listen......i can hear it most when in a parking garage.
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09-27-2012, 05:23 PM	#4
JYohay Banned 48 Rep 2,009 Posts Drives: 2011 X5 Join Date: Mar 2012 Location: NY iTrader: (3)	yes...sounds like a metal jumbling around....i also hear a click when the rpms drop below around 2-3K RPM
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09-27-2012, 05:43 PM	#6
JYohay Banned 48 Rep 2,009 Posts Drives: 2011 X5 Join Date: Mar 2012 Location: NY iTrader: (3)	i def noticed it more the day after i put DPs on. now that youve heard it you will still notice it even if you put them on. the warranty on them just got pushed to alot higher milage. if you cant find a dealer who will look the other way on mods, then just wait for the weather to get real bad and get them removed and take it in, its covered.
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09-28-2012, 10:27 AM	#7
Redrkt503 Lieutenant 31 Rep 439 Posts Drives: E92 335is Join Date: Jan 2012 Location: Ft. Lauderdale, FL iTrader: (0)	What exactly is the warranty pushed to now? __________________ 2011 335is "Redrkt" 6 MT DocRace 6266 Single Turbo - Fuel it stage 3 LPFP - Fuel it PI - spec stage 3+ clutch - mfactory SM flywheel - 100% E85 - VRSF 7.5" intercooler - VRSF charge pipe w/ HKS BOV - JB4 - MHD back end flash 768 whp 695 ft lbs - E85 - 32PSI
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09-28-2012, 10:41 AM	#8
jcarv20s Second Lieutenant 19 Rep 210 Posts Drives: 2014 435i Join Date: Apr 2012 Location: Danbury, CT iTrader: (0)	82,000 miles I believe
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09-28-2012, 10:46 AM	#9
Bakeme521 Some say... 251 Rep 4,296 Posts Drives: Fresh Join Date: Mar 2010 Location: Baton Rouge n NOLA iTrader: (12) Garage List 2007 BMW 335i [8.24]	Doesn't matter if you have a warranty and you can get the turbos replaced, it will still do it. I had mine replaced about 23k and it was doing it about a month later. Only thing that has really fixed it putting a procede on the car and fine tuning the wastegate position. __________________ I have exhaust and an intake...
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09-28-2012, 11:02 AM	#10
sam0329 Second Lieutenant 6 Rep 205 Posts Drives: 2011 BMW E92 M3 Join Date: Jun 2011 Location: Edmonton AB iTrader: (3)	I own a 135i and last weekend just installed my AR Catless DP + Maddad full catback with resonators. I have exactly same noise that everybody experiencing here. Its really annoying when driving on highway here is Canada because its 100km and it land perfectly on the 1800 to 2000rpm range. I have an auto so that make things even worst. Right now I am running Cobb OTS stage 2 + FMIC and hopefully things will get better when I get a custom tune
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