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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > please, need some knowledgeable help!



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      11-26-2012, 03:09 PM   #1
dreweezy
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please, need some knowledgeable help!

i have a 2007 335i, can you guys help me figure out the rattle? i read on the forum that some had rattle due to the wastegate, but some say that its the actuator of the left exhaust valve. my car is at 84000 miles. im trying to figure out if the noises that im hearing is due to bad turbos, wastegates, or the left exhaust valve. i have not done the golf tee mod or the disconnect actuator plug mod, yet


timeline, revs are around 3500-4500 rpm

0:15, cold start, first rattle. left exhaust closed
1:21, warm up done, idling with both exhausts open
1:45, is that exhaust popping noise normal when decelerating?
2:21, is that how a stock engine is supposed to sound when idling?
2:44, is that normal for the engine/turbo to whine when decelerating?
3:15, is that normal for the engine/turbo to whine like that even when accelerating?
3:26, is that normal for the engine/turbo to sound like that when turning of car?

thanks!


Last edited by dreweezy; 11-26-2012 at 03:21 PM.
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      11-26-2012, 03:32 PM   #2
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From what I can hear, the left exhaust valve is rattling, which happens on all of our cars. To get rid of that just unplug the actuator.

Everything sounds normal but I think I hear some slight wastegate rattle. Other than that I didn't hear anything strange.
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      11-27-2012, 04:18 AM   #3
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are there any negative effects to the golf tee/unplugging the actuator mod?
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      11-27-2012, 06:14 AM   #4
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Sounds normal and that rattle came from the exhaust flap.


Also, you did this in your garage with the garage door closed? o_O
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      11-27-2012, 03:19 PM   #5
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yeah man! i love the smell of carbon monoxide! hahah jk, the side garage door was open
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