08 n54 on pure stage 2 dd. Extreme wastegate rattle since install

Daman1702 · 07-20-2021, 03:45 AM

Hey i have a bmw 335i 2008 with pure stage 2 DD turbos. since 500 miles from leaving a verified shop in nyc. it started to have a extremely loud waste gate rattle. ive done every boost line and both solenoids and it continues to rattle worse then my old turbos ever did. Its usually when im rolling down a flat ground or down hill at about 1.5-2.5k rpms coasting or on a deceleration. it will sound like a quarter in a soda can. ive done adjustments from my tuner wedge performance multiple times to no success and done every percent of waste gate rattle fix in mhd tool and still always rattles. also it rattles when i rev in neutral only at 1.5krpm when the rpms drop after letting off the gas. i usually dont hear any rattle when accelerating its only when coasting or on deceleration.
what can i do to fix this issue without having to do a turbo swap?

also havent done any actuator arm adjustmenets yut but it never happens when the door is completely shut.

Saif2018 · 07-20-2021, 07:06 AM

Quote:

Originally Posted by Daman1702

Hey i have a bmw 335i 2008 with pure stage 2 DD turbos. since 500 miles from leaving a verified shop in nyc. it started to have a extremely loud waste gate rattle. ive done every boost line and both solenoids and it continues to rattle worse then my old turbos ever did. Its usually when im rolling down a flat ground or down hill at about 1.5-2.5k rpms coasting or on a deceleration. it will sound like a quarter in a soda can. ive done adjustments from my tuner wedge performance multiple times to no success and done every percent of waste gate rattle fix in mhd tool and still always rattles. also it rattles when i rev in neutral only at 1.5krpm when the rpms drop after letting off the gas. i usually dont hear any rattle when accelerating its only when coasting or on deceleration.
what can i do to fix this issue without having to do a turbo swap?

also havent done any actuator arm adjustmenets yut but it never happens when the door is completely shut.

Turn off Wastegate rattle fix.

Try adjusting the wastegate actuator arms. If that doesn't fix it, then it's probably a Turbo out job.

Jaronbwall · 07-20-2021, 07:56 AM

Quote:

Originally Posted by Saif2018

Turn off Wastegate rattle fix.

Try adjusting the wastegate actuator arms. If that doesn't fix it, then it's probably a Turbo out job.

This, 100%.
That's all you got my friend. I've owned my current car for 6 years and everything I've read about these cars and the turbos leads to this "fix". I had bad wastegate rattle on my previous 335i but the turbos were under warranty at the time. Talk about hitting the jackpot. BMW replaced everything. My experience with the dealership was amazing. I've since found a independent mechanic that does equal or better work for better prices. Good luck man.

Dave92N54 · 07-21-2021, 04:24 PM

If I had to guess, shop did not verify wastegate position before install. You're supposed to ensure they're seated at 6in/hg and fully closed at 7, if not then you need to adjust the arm. Skipping this step can lead to a lose wastegate arm which can in turn wear out the actuator diaphragm faster than you'd expect.

Have you checked to make sure the downpipes are not hitting the subframe or the heat shield is properly in place?

haaken675 · 07-22-2021, 06:04 AM

Quote:

Originally Posted by Dave92N54

Have you checked to make sure the downpipes are not hitting the subframe or the heat shield is properly in place?

This is absolutely something to look for. Something touching can definitely sounds like wastegate rattle.

whyzee125 · 07-22-2021, 11:08 AM

I’d guess either it’s the downpipes hitting the subframe or they didn’t correctly adjust your wastgates.

slowest90@kc · 12-21-2021, 10:44 AM

[QUOTE=Daman1702;27822913]Hey i have a bmw 335i 2008 with pure stage 2 DD turbos. since 500 miles from leaving a verified shop in nyc. it started to have a extremely loud waste gate rattle. ive done every boost line and both solenoids and it continues to rattle worse then my old turbos ever did. Its usually when im rolling down a flat ground or down hill at about 1.5-2.5k rpms coasting or on a deceleration. it will sound like a quarter in a soda can. ive done adjustments from my tuner wedge performance multiple times to no success and done every percent of waste gate rattle fix in mhd tool and still always rattles. also it rattles when i rev in neutral only at 1.5krpm when the rpms drop after letting off the gas. i usually dont hear any rattle when accelerating its only when coasting or on deceleration.
what can i do to fix this issue without having to do a turbo swap?

also havent done any actuator arm adjustmenets yut but it never happens when the door is completely shut.

Did you ever fix the rattle? I’m having the same issue. Pure stage 2 600s installed about a year ago, as long as I can remember I’ve had a slight rattle on light acceleration. Now it’s progressively gets worse not only on light acceleration but very bad on deceleration, every time I let off the gas! The rear turbo wastegate actuator is definitely the issue. Very lose, I can shake it and hear the same rattle as I do when driving. Also can easily open close the wastegate into the diaphragm. Which is oddly rusted. Also have an oil leak which looks like it’s coming from the middle of the turbo (viewed under the car)

07-20-2021, 03:45 AM	#1
Daman1702 New Member 0 Rep 19 Posts Drives: 335i 2008 e93 Join Date: Aug 2020 Location: New york iTrader: (0)	08 n54 on pure stage 2 dd. Extreme wastegate rattle since install Hey i have a bmw 335i 2008 with pure stage 2 DD turbos. since 500 miles from leaving a verified shop in nyc. it started to have a extremely loud waste gate rattle. ive done every boost line and both solenoids and it continues to rattle worse then my old turbos ever did. Its usually when im rolling down a flat ground or down hill at about 1.5-2.5k rpms coasting or on a deceleration. it will sound like a quarter in a soda can. ive done adjustments from my tuner wedge performance multiple times to no success and done every percent of waste gate rattle fix in mhd tool and still always rattles. also it rattles when i rev in neutral only at 1.5krpm when the rpms drop after letting off the gas. i usually dont hear any rattle when accelerating its only when coasting or on deceleration. what can i do to fix this issue without having to do a turbo swap? also havent done any actuator arm adjustmenets yut but it never happens when the door is completely shut.
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07-21-2021, 04:24 PM	#4
Dave92N54 Major 534 Rep 1,173 Posts Drives: 09 E92 335i 6MT Join Date: Nov 2020 Location: Westminster, Maryland iTrader: (0) Garage List 2009 BMW 335i [10.00]	If I had to guess, shop did not verify wastegate position before install. You're supposed to ensure they're seated at 6in/hg and fully closed at 7, if not then you need to adjust the arm. Skipping this step can lead to a lose wastegate arm which can in turn wear out the actuator diaphragm faster than you'd expect. Have you checked to make sure the downpipes are not hitting the subframe or the heat shield is properly in place? __________________ 09 E92 335i 6MT / Alpine White / Coral Red / VRSF 7.5" / VRSF DCI / VRSF Catless Downpipes / VTT Charge Pipe / Turbosmart RacePort Gen V / RB OEM Billet Turbos / CD919 Custom Tune / Bilstein PSS9s
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07-22-2021, 11:08 AM	#6
whyzee125 Brigadier General 1992 Rep 4,015 Posts Drives: Dinan stage 2 335i Join Date: Jul 2014 Location: Chattanooga Tn iTrader: (0)	I’d guess either it’s the downpipes hitting the subframe or they didn’t correctly adjust your wastgates.
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12-21-2021, 10:44 AM	#7
slowest90@kc Registered 2 Rep 4 Posts Drives: 2008 BMW 335i Join Date: Oct 2021 Location: Kansas City iTrader: (0)	[QUOTE=Daman1702;27822913]Hey i have a bmw 335i 2008 with pure stage 2 DD turbos. since 500 miles from leaving a verified shop in nyc. it started to have a extremely loud waste gate rattle. ive done every boost line and both solenoids and it continues to rattle worse then my old turbos ever did. Its usually when im rolling down a flat ground or down hill at about 1.5-2.5k rpms coasting or on a deceleration. it will sound like a quarter in a soda can. ive done adjustments from my tuner wedge performance multiple times to no success and done every percent of waste gate rattle fix in mhd tool and still always rattles. also it rattles when i rev in neutral only at 1.5krpm when the rpms drop after letting off the gas. i usually dont hear any rattle when accelerating its only when coasting or on deceleration. what can i do to fix this issue without having to do a turbo swap? also havent done any actuator arm adjustmenets yut but it never happens when the door is completely shut. Did you ever fix the rattle? I’m having the same issue. Pure stage 2 600s installed about a year ago, as long as I can remember I’ve had a slight rattle on light acceleration. Now it’s progressively gets worse not only on light acceleration but very bad on deceleration, every time I let off the gas! The rear turbo wastegate actuator is definitely the issue. Very lose, I can shake it and hear the same rattle as I do when driving. Also can easily open close the wastegate into the diaphragm. Which is oddly rusted. Also have an oil leak which looks like it’s coming from the middle of the turbo (viewed under the car)
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