Tinny Rattle in Exhaust Under Load

deep green · 12-18-2011, 12:43 AM

Looking for some help..
Does anyone know of a "tinny" sounding rattle/vibration in the exhaust system of E93's when you load the car up a little? Seems to be worse when cold and appears to get a little better as the car warms up. Particularly noticeable when the chip is set for stronger boost map2. (Sounds like some sort of metal gate flapping around somewhere?) Kinda spoils the sound of catless pipes and chip combo.

Any clues as to how to fix it would be greatly appreciated, thanks.

Kiwi Peter · 12-18-2011, 01:02 AM

The wast gate system may have an issue, what are you running JB or Procede

deep green · 12-18-2011, 01:04 AM

procede v5

335i-boy · 12-18-2011, 06:35 AM

It may be wastegate related. Using the Procede software, try adjusting the wastegate position in the user map adjustables. Change it to 50%. If that doesn't improve things, change it to 30%.

This will tighten the wastegate reducing "slack" in the linkage. If you do not notice any improvement, its probably not wastegate related and may be associated with another component in the exhaust. I would also check that your catless dp's are not hitting each other anywhere, especially between the flanges where they bolt up to the rest of the exhaust.

deep green · 12-19-2011, 12:40 AM

Quote:

Originally Posted by 335i-boy

It may be wastegate related. Using the Procede software, try adjusting the wastegate position in the user map adjustables. Change it to 50%. If that doesn't improve things, change it to 30%.

This will tighten the wastegate reducing "slack" in the linkage. If you do not notice any improvement, its probably not wastegate related and may be associated with another component in the exhaust. I would also check that your catless dp's are not hitting each other anywhere, especially between the flanges where they bolt up to the rest of the exhaust.

Great suggestions, thanks. Checked position of DPs - all clear no probs there. Will try your ideas re reduced wastegate positions and post outcomes. Cheers.

RaihaX · 12-19-2011, 01:05 AM

down side (or upside) of changing it is that your exhaust gets louder, i got the wastegate rattle too but putting it to 50% (which is the magic number for me) made my exhaust too loud for DD

MFKN3 · 12-19-2011, 09:45 PM

Definately sounds like wastegates dude

What about when going up a ramp, do they rattle more then? There's a few vids on youtube which might help you confirm the sound...

12-18-2011, 12:43 AM	#1
deep green Private 3 Rep 64 Posts Drives: E93 335i Vert Join Date: Jan 2008 Location: Melbourne Australia iTrader: (0) Garage List 2007 335i Convertible [0.00] 2007 335Ci [0.00]	Tinny Rattle in Exhaust Under Load Looking for some help.. Does anyone know of a "tinny" sounding rattle/vibration in the exhaust system of E93's when you load the car up a little? Seems to be worse when cold and appears to get a little better as the car warms up. Particularly noticeable when the chip is set for stronger boost map2. (Sounds like some sort of metal gate flapping around somewhere?) Kinda spoils the sound of catless pipes and chip combo. Any clues as to how to fix it would be greatly appreciated, thanks. __________________ luvnit
	Appreciate 0 Tweet Quote

12-18-2011, 01:02 AM	#2
Kiwi Peter 162 Rep 1,460 Posts Drives: E92 M3 2012 Edition 500 Join Date: May 2011 Location: Cambridge, New Zealand iTrader: (0)	Exhaust Noise The wast gate system may have an issue, what are you running JB or Procede
	Appreciate 0 Quote

12-18-2011, 01:04 AM	#3
deep green Private 3 Rep 64 Posts Drives: E93 335i Vert Join Date: Jan 2008 Location: Melbourne Australia iTrader: (0) Garage List 2007 335i Convertible [0.00] 2007 335Ci [0.00]	procede v5 __________________ luvnit
	Appreciate 0 Quote

12-18-2011, 06:35 AM	#4
335i-boy Lieutenant 15 Rep 457 Posts Drives: E92 335i M-Sport Join Date: Jun 2010 Location: Australia iTrader: (0)	It may be wastegate related. Using the Procede software, try adjusting the wastegate position in the user map adjustables. Change it to 50%. If that doesn't improve things, change it to 30%. This will tighten the wastegate reducing "slack" in the linkage. If you do not notice any improvement, its probably not wastegate related and may be associated with another component in the exhaust. I would also check that your catless dp's are not hitting each other anywhere, especially between the flanges where they bolt up to the rest of the exhaust. __________________ 2008 E92 335i M-Sport \| Sapphire Black \| Sunroof \| Creme Beige \| Poplar Grey \| Logic 7 \| 6AT \| 19" AG M359's \| Michelin PS4S \| LUX V3 \| MHD V5 E40 \| Steve AZ Walbro inline \| Vishnu DCI \| BMS CP \| AR Design Catless DP's \| Forge DV's \| Helix IC \| (Stock Cat. back) \|
	Appreciate 0 Quote

12-19-2011, 01:05 AM	#6
RaihaX Major General 156 Rep 4,995 Posts Drives: 08' 135i Join Date: Aug 2008 Location: Australia, Perth iTrader: (2)	down side (or upside) of changing it is that your exhaust gets louder, i got the wastegate rattle too but putting it to 50% (which is the magic number for me) made my exhaust too loud for DD
	Appreciate 0 Quote

12-19-2011, 09:45 PM	#7
MFKN3 Colonel 127 Rep 2,224 Posts Drives: supercharged 4.4L stroker E92 Join Date: Nov 2008 Location: Australia iTrader: (2)	Definately sounds like wastegates dude What about when going up a ramp, do they rattle more then? There's a few vids on youtube which might help you confirm the sound...
	Appreciate 0 Quote