cobb turbo wastegate rattle

Tyler0630 · 06-18-2011, 10:12 PM

Please watch the last 30 seconds of the video. Has anyone noticed wastegate rattle using Cobb. I do not get this on factory settings.

2007 335 58 k miles

Thanks.

mithiral67 · 06-18-2011, 10:44 PM

Wastegate rattles are normal on these cars. I honestly cant hear any on yours though. Mine does for the first min or two of driving, and I can only hear it when in a garage off a wall. Then after its warmed up, its gone.

s2k_335i · 06-19-2011, 12:06 AM

+1, wastegates seem to be a hit and miss on these cars. I had my adjusted and replaced by the dealer. I didn't think Cobb has an adjustment for Wastegates but I could be wrong. Try to adjust the wastgates by yourself if you can work on car.

mithiral67 · 06-19-2011, 12:08 AM

Cobb doesn't not. Maybe with atr

Tyler0630 · 06-19-2011, 12:16 AM

hmmm, I used to only hear the rattle when I start my engine for the first minute or so when I rev. Now I hear it the whole time. I will go back to stock map take a video to compare so you see what I mean because I dont have the rattle in stock settings.

Just wondering if anyone else with cobb has noticed this or if I am the first.

Krazy3281 · 06-19-2011, 01:59 AM

From what I rmr reading, and someone may need to confirm this.

That the BMW oem software keeps the wastegate opened to prevent rattling, and the Cobb keeps it closed, so it can create back pressure, but you'll hear the rattling as a downside.

808E90 · 06-19-2011, 02:49 AM

That video sucks Tyler ...

bkrM3 · 06-19-2011, 08:37 AM

Quote:

Originally Posted by Krazy3281

From what I rmr reading, and someone may need to confirm this.

That the BMW oem software keeps the wastegate opened to prevent rattling, and the Cobb keeps it closed, so it can create back pressure, but you'll hear the rattling as a downside.

+1

Bimmeroid · 06-19-2011, 11:30 AM

My 2007 has the same issue, well not sure if it really is an issue. Without Cobb installed I get minimum to no rattle, but when installed I have a very prominent rattle from the stock exhaust.

silkshocker · 06-19-2011, 01:55 PM

sounds kinda cool actually

caradd · 06-19-2011, 02:07 PM

As metionted before, BMW halfass fix for the rattle was a software update which opens the gates 45 seconds or so after warm up.

The Cobb overwrites the software to how it should be closed wastegates, unfortunately due to the poor design they get loose and rattle.

By keeping the gates open it causes lag, that is why many have complained about the power after getting the software update.

Tyler0630 · 06-20-2011, 05:42 PM

Quote:

Originally Posted by Krazy3281

From what I rmr reading, and someone may need to confirm this.

That the BMW oem software keeps the wastegate opened to prevent rattling, and the Cobb keeps it closed, so it can create back pressure, but you'll hear the rattling as a downside.

thanks for the info

Quote:

Originally Posted by 808E90

That video sucks Tyler ...

lol

Quote:

Originally Posted by silkshocker

sounds kinda cool actually

hahaha i wish, in person it sounds like i'm driving a buick with beer cans strung behind my car, with "just married" on my rear windshield.

dyezak · 06-20-2011, 05:59 PM

Grab two wrenches and tighten up the wastegate. Takes 10min and gets rid of the rattle.

///M3THOD · 06-20-2011, 09:17 PM

Quote:

Originally Posted by dyezak

Grab two wrenches and tighten up the wastegate. Takes 10min and gets rid of the rattle.

This does not work all the time. I have to make myself a tool to grip the actuator arm itself because the mm is so small I couldn't find anyone who sold a wrench.

dyezak · 06-20-2011, 09:57 PM

Quote:

Originally Posted by ///M3THOD

This does not work all the time. I have to make myself a tool to grip the actuator arm itself because the mm is so small I couldn't find anyone who sold a wrench.

Sears...4mm craftsman $3

caradd · 06-20-2011, 10:24 PM

Quote:

Originally Posted by ///M3THOD

This does not work all the time. I have to make myself a tool to grip the actuator arm itself because the mm is so small I couldn't find anyone who sold a wrench.

This only works for the rear not the front wastegate.

Jeff@TopGearSolutions · 06-21-2011, 12:54 AM

Wastegates are at different positions between stock and tuned thus the difference in noises between the 2.

Right now you cant adjust your wastegate position with Cobb. Something like the PROcede can though.

You would need for it to worsen on a stock map before the dealer does anything about it unfortunately or try adjusting it yourself using the DIY guide by Mr.5 at your own risk.

vase330 · 06-21-2011, 01:09 AM

58K 07 335 obviously out of warranty. Now you can accept the lag or try adjusting or just learn to ignore the noise. It doesn't sound that bad OP. You should hear some of the ones I have heard. Mine was so bad everyone even old ladies would notice and tell me something was wrong with my car. I laughed it off told them it was normal, but turned out my Turbos were bad too not just the waste-gates.

Tyler0630 · 06-21-2011, 04:14 AM

Quote:

Originally Posted by Jeff@topgearsolutions

Wastegates are at different positions between stock and tuned thus the difference in noises between the 2.

Right now you cant adjust your wastegate position with Cobb. Something like the PROcede can though.

You would need for it to worsen on a stock map before the dealer does anything about it unfortunately or try adjusting it yourself using the DIY guide by Mr.5 at your own risk.

Thank you I will try this.

Quote:

Originally Posted by vase330

58K 07 335 obviously out of warranty. Now you can accept the lag or try adjusting or just learn to ignore the noise. It doesn't sound that bad OP. You should hear some of the ones I have heard. Mine was so bad everyone even old ladies would notice and tell me something was wrong with my car. I laughed it off told them it was normal, but turned out my Turbos were bad too not just the waste-gates.

I have 100k / Jan '14, I bought an extended warranty that is only $200 for any repair done at the dealer, however since it is not persistent on stock ecu settings I dont want to have them void my warranty when they see it with a tune.

Tyler0630 · 06-22-2011, 05:54 AM

also this may seem like a very dumb question and Im pretty sure I already know the answer... Will installing any aftermarket parts such as DPs/Exhaust or BOV stuff like that get rid of the noise.

this is a better video showing the noise coming from the engine and not the exhaust...

thwgw24 · 06-22-2011, 07:53 AM

Quote:

Originally Posted by Tyler0630

also this may seem like a very dumb question and Im pretty sure I already know the answer... Will installing any aftermarket parts such as DPs/Exhaust or BOV stuff like that get rid of the noise.

this is a better video showing the noise coming from the engine and not the exhaust...

With full bolt on, you will still hear the rattle because it comes on while decelerating. Exhaust tone will not cover the rattle.

Tyler0630 · 08-23-2011, 03:13 AM

im pretty excited to say that i just installed the newest maps and the ACN91 acts very similar to stock wastegate settings.

anyways I'm very please to say that when my engine is warm i don't hear the constant rattle during revs and deceleration.

anyone know where i can find more info on what the ACN91 map actually does?

I checked cobbs website and forums but couldn't come up with anything related to BMW.

06-18-2011, 10:12 PM	#1
Tyler0630 Private First Class 13 Rep 131 Posts Drives: e36, e46, e92, e90 m3, f82 m4 Join Date: Feb 2010 Location: Hawaii iTrader: (0)	cobb turbo wastegate rattle Please watch the last 30 seconds of the video. Has anyone noticed wastegate rattle using Cobb. I do not get this on factory settings. 2007 335 58 k miles Thanks. Last edited by Tyler0630; 06-22-2011 at 05:56 AM.. Reason: double post
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06-18-2011, 10:44 PM	#2
mithiral67 That guy 120 Rep 5,740 Posts Drives: 2015 Cayman GTS Join Date: Jun 2008 Location: Chicago Burbs iTrader: (4) Garage List 2015 Porsche Cayman ... [0.00]	Wastegate rattles are normal on these cars. I honestly cant hear any on yours though. Mine does for the first min or two of driving, and I can only hear it when in a garage off a wall. Then after its warmed up, its gone.
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06-19-2011, 12:06 AM	#3
s2k_335i This is it!! 18 Rep 672 Posts Drives: FBO 335i without meth Join Date: Jul 2010 Location: Land of Freedom iTrader: (1)	+1, wastegates seem to be a hit and miss on these cars. I had my adjusted and replaced by the dealer. I didn't think Cobb has an adjustment for Wastegates but I could be wrong. Try to adjust the wastgates by yourself if you can work on car. __________________ DFW, TX. Current: 08' Cayenne GTS, 14' Boxster S, 12' CBR 1000', 04' Bayliner 2556 Sold: 2010 A4, 2008 335i, 2007 335i, 2006 M3, 2006 S2000, 1990 NSX, 1991 300zx, 1992 Supra, 1996 Prelude, 1981 CRX, 1980 Mustang.
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06-19-2011, 12:08 AM	#4
mithiral67 That guy 120 Rep 5,740 Posts Drives: 2015 Cayman GTS Join Date: Jun 2008 Location: Chicago Burbs iTrader: (4) Garage List 2015 Porsche Cayman ... [0.00]	Cobb doesn't not. Maybe with atr
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06-19-2011, 12:16 AM	#5
Tyler0630 Private First Class 13 Rep 131 Posts Drives: e36, e46, e92, e90 m3, f82 m4 Join Date: Feb 2010 Location: Hawaii iTrader: (0)	hmmm, I used to only hear the rattle when I start my engine for the first minute or so when I rev. Now I hear it the whole time. I will go back to stock map take a video to compare so you see what I mean because I dont have the rattle in stock settings. Just wondering if anyone else with cobb has noticed this or if I am the first.
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06-19-2011, 01:59 AM	#6
Krazy3281 Private First Class 8 Rep 138 Posts Drives: E92 Montego/Saddle Join Date: Nov 2010 Location: Chicago iTrader: (1)	From what I rmr reading, and someone may need to confirm this. That the BMW oem software keeps the wastegate opened to prevent rattling, and the Cobb keeps it closed, so it can create back pressure, but you'll hear the rattling as a downside. __________________ 2008 E92 Montego/Saddle 6MT; Delivered: 6.30.08 Last edited by Krazy3281; 06-19-2011 at 01:59 AM.. Reason: sp
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06-19-2011, 02:49 AM	#7
808E90 808E90 255 Rep 4,045 Posts Drives: E90 ///M Join Date: Aug 2008 Location: Aloha State iTrader: (21)	That video sucks Tyler ... __________________ LTMW FTL . Karbonwerks LCI Trunk . Vorsteiner Poly Front Lip . NA Motorsports LUX H8 . RECARO Pole Position Seats . BMW Performance Pedals . BMW Performance Performance Grills . BMW Painted Fender Grills . BBS 19x9.5 19x11 LMs . Michelin PS2 265/295 . H&R Sport Springs . Wheel Mate 45/55MM Stud Kit . BBS Red Lug Nuts . ESS VT1 Supercharger . Akrapovic GT4 Exhaust
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06-19-2011, 11:30 AM	#9
Bimmeroid Private 6 Rep 89 Posts Drives: 2016 F83 Join Date: Oct 2010 Location: NoVa, USA iTrader: (0)	My 2007 has the same issue, well not sure if it really is an issue. Without Cobb installed I get minimum to no rattle, but when installed I have a very prominent rattle from the stock exhaust. __________________ 2016 F83//DCT//Mineral White Metallic on Sakhir Orange
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06-19-2011, 01:55 PM	#10
silkshocker Private First Class 9 Rep 113 Posts Drives: 2007 335i Join Date: May 2011 Location: ATL iTrader: (1)	sounds kinda cool actually
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06-19-2011, 02:07 PM	#11
caradd () () 10 Rep 436 Posts Drives: 2007 e92 335i 6mt Join Date: Jun 2009 Location: Here iTrader: (3)	As metionted before, BMW halfass fix for the rattle was a software update which opens the gates 45 seconds or so after warm up. The Cobb overwrites the software to how it should be closed wastegates, unfortunately due to the poor design they get loose and rattle. By keeping the gates open it causes lag, that is why many have complained about the power after getting the software update. __________________
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06-20-2011, 05:59 PM	#13
dyezak General of the Armies 162 Rep 661 Posts Drives: X5M Join Date: May 2011 Location: Plano, TX iTrader: (2)	Grab two wrenches and tighten up the wastegate. Takes 10min and gets rid of the rattle.
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06-21-2011, 12:54 AM	#17
Jeff@TopGearSolutions 3472 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	Wastegates are at different positions between stock and tuned thus the difference in noises between the 2. Right now you cant adjust your wastegate position with Cobb. Something like the PROcede can though. You would need for it to worsen on a stock map before the dealer does anything about it unfortunately or try adjusting it yourself using the DIY guide by Mr.5 at your own risk.
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06-21-2011, 01:09 AM	#18
vase330 Colonel 103 Rep 2,760 Posts Drives: 19 E63S; 15.5 RangeRover ATB Join Date: Jan 2007 Location: Arlington, Va iTrader: (1)	58K 07 335 obviously out of warranty. Now you can accept the lag or try adjusting or just learn to ignore the noise. It doesn't sound that bad OP. You should hear some of the ones I have heard. Mine was so bad everyone even old ladies would notice and tell me something was wrong with my car. I laughed it off told them it was normal, but turned out my Turbos were bad too not just the waste-gates. __________________ E92 335 \| Space Gray \| Saddle Brown Dakota \| Dark Burl Trim \| ZPP \| ZSP \| AT \| Idrive \| 6FL \| FBO \| Dinan CAI \| Quaife LSD \| STG3 PROCede.
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06-22-2011, 05:54 AM	#20
Tyler0630 Private First Class 13 Rep 131 Posts Drives: e36, e46, e92, e90 m3, f82 m4 Join Date: Feb 2010 Location: Hawaii iTrader: (0)	also this may seem like a very dumb question and Im pretty sure I already know the answer... Will installing any aftermarket parts such as DPs/Exhaust or BOV stuff like that get rid of the noise. this is a better video showing the noise coming from the engine and not the exhaust...
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08-23-2011, 03:13 AM	#22
Tyler0630 Private First Class 13 Rep 131 Posts Drives: e36, e46, e92, e90 m3, f82 m4 Join Date: Feb 2010 Location: Hawaii iTrader: (0)	im pretty excited to say that i just installed the newest maps and the ACN91 acts very similar to stock wastegate settings. anyways I'm very please to say that when my engine is warm i don't hear the constant rattle during revs and deceleration. anyone know where i can find more info on what the ACN91 map actually does? I checked cobbs website and forums but couldn't come up with anything related to BMW.
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