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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 > New Turbos, wastegate rattle still present



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      02-16-2013, 04:40 PM   #1
quasitime
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New Turbos, wastegate rattle still present

So I had what someone described "the worst case of wastegate rattle he's ever heard". It lasted for something like 45 seconds after startup, and you could hear the typical rattlesnake on light acceleration and when you let off the throttle.

Long story short, the dealership performed their tests and agreed, and swapped out turbos per their own recommendation.

I pickup the car today and idle is much smoother, but the rattle off throttle is still there. I have to let the car cool down to test startup rattle.... but fearing the worst.

Anyone else have experience with this?
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      02-16-2013, 05:28 PM   #2
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did u pay out of pocket for this?? I literally just came back from the dealer and they said it sounds like my actuators are rattling...they said i can replace turbos for $6K. I also have an 07
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      02-16-2013, 05:38 PM   #3
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For $6k, you can put RB Turbos in there and still have some cash in your pocket!
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      02-16-2013, 06:02 PM   #4
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I had the wastegate actuators and turbos replaced 3 months ago. Already rattling again. At least then snails are fresh n
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      02-16-2013, 06:07 PM   #5
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It's obviously not the wastegates located in the turbos since you just had them replaced. Most likely your wastegate actuators are toast. But the real question is why didn't the dealer hear the same rattle you're hearing...

Quote:
Originally Posted by quasitime View Post
So I had what someone described "the worst case
of wastegate rattle he's ever heard". It lasted for something like 45 seconds after startup, and you could hear the typical rattlesnake on light acceleration and when you let off the throttle.

Long story short, the dealership performed their tests and agreed, and swapped out turbos per their own recommendation.

I pickup the car today and idle is much smoother, but the rattle off throttle is still there. I have to let the car cool down to test startup rattle.... but fearing the worst.

Anyone else have experience with this?
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      02-16-2013, 06:44 PM   #6
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Yea there is no way it could be the wastegates especially after getting them replaced from the dealer. Go back up there and say you still have a similar noise present. There should be no rattling whatsoever and if your under the 82,000 mile warranty or whatever it is then they should fix the noise at hand from what I understand....
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      02-16-2013, 07:08 PM   #7
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Quote:
Originally Posted by akuliest View Post
did u pay out of pocket for this?? I literally just came back from the dealer and they said it sounds like my actuators are rattling...they said i can replace turbos for $6K. I also have an 07
No these were replaced under the turbo warranty. They have a known issue on wastegate rattle so you shouldn't have to shell out $6k if you're under 8yr/82k if I remember correctly.

Here are snippets from the tech notes:

REMOVED TURBOS, INSPECTION OF BANK 1 TURBO REVEALED NO BINDING @ WASTEGATE. BANK 1 TURBO FAILED DRILL BIT TEST. PERFORMED DRILL BIT TEST ON BANK 2 TURBO, PASSED. WASTEGATE IDENTIFIED TO BE BINDING DURING HAND OPERATION. TC/DIAG CODE NO LONGER REGUIRED FOR N54 TURBOS. REPLACED BOTH TURBO ASSEMBLYS, TOPPED OFF ALL FLUIDS, TEST DRIVE OK, NOISE ELIMINATED

Wonder what the drill bit test is? At least they replaced both turbos. I'm hesitant to take it back right now because I've been without the car for awhile. Plus, aren't the actuators replaced along with the turbo assemblies?

Last edited by quasitime; 02-16-2013 at 07:08 PM. Reason: numbers are wrong
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      02-16-2013, 07:13 PM   #8
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The drill bit test is just a measurement of the wastegate arm in reference to the wastegate actuator rod with vacuum applied.

You sure the muffler flap is not rattling? lol

Quote:
Originally Posted by quasitime View Post
No these were replaced under the turbo warranty. They have a known issue on wastegate rattle so you shouldn't have to shell out $6k if you're under 8yr/82k if I remember correctly.

Here are snippets from the tech notes:

REMOVED TURBOS, INSPECTION OF BANK 1 TURBO REVEALED NO BINDING @ WASTEGATE. BANK 1 TURBO FAILED DRILL BIT TEST. PERFORMED DRILL BIT TEST ON BANK 2 TURBO, PASSED. WASTEGATE IDENTIFIED TO BE BINDING DURING HAND OPERATION. TC/DIAG CODE NO LONGER REGUIRED FOR N54 TURBOS. REPLACED BOTH TURBO ASSEMBLYS, TOPPED OFF ALL FLUIDS, TEST DRIVE OK, NOISE ELIMINATED

Wonder what the drill bit test is? At least they replaced both turbos. I'm hesitant to take it back right now because I've been without the car for awhile. Plus, aren't the actuators replaced along with the turbo assemblies?
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      02-16-2013, 07:21 PM   #9
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Quote:
Originally Posted by Juiced46 View Post
The drill bit test is just a measurement of the wastegate arm in reference to the wastegate actuator rod with vacuum applied.

You sure the muffler flap is not rattling? lol
Umm. You never know! I'll look into it.
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      02-17-2013, 01:39 AM   #10
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Update: It's not the exhaust flapper.

It's wastegate rattle, but at the very least it's much diminished and hopefully I can mess with default wastegate position settings to work with it.
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      02-17-2013, 02:47 AM   #11
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Quote:
Originally Posted by quasitime View Post
Update: It's not the exhaust flapper.

It's wastegate rattle, but at the very least it's much diminished and hopefully I can mess with default wastegate position settings to work with it.
wait, so your brand new turbos have wastegate rattle without a tune? or did you just slap the tune back on without testing stock operation first?
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      02-17-2013, 03:25 AM   #12
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I never took the tune off. I put it in valet mode for the dealership and testing afterwards.

Yeah it's definitely rattle, just nowhere near what it was like before.
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      02-17-2013, 03:02 PM   #13
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Quote:
Originally Posted by quasitime
I never took the tune off. I put it in valet mode for the dealership and testing afterwards.

Yeah it's definitely rattle, just nowhere near what it was like before.
+2

LoL, love that ^... Everyone is so paranoid about tunes & you roll yours in like whatever.
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      02-17-2013, 05:08 PM   #14
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Quote:
Originally Posted by quasitime View Post
I never took the tune off. I put it in valet mode for the dealership and testing afterwards.

Yeah it's definitely rattle, just nowhere near what it was like before.

so it never occurred to you to check if the car still rattles stock?

did you at least reset to the default adaptation values on the tune?
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      02-18-2013, 02:42 AM   #15
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Quote:
Originally Posted by Greatdane84 View Post
+2

LoL, love that ^... Everyone is so paranoid about tunes & you roll yours in like whatever.
I just don't give much of a shit anymore. I've done my time de-modding and I'm tired of it. Besides, most of my warranty is expired anyways.

Last edited by quasitime; 02-18-2013 at 02:43 AM. Reason: warranty
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      02-18-2013, 11:40 AM   #16
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I had my turbos replaced a few months ago. The rattle is always going to be there on factory turbos, they are genuinely noisy. If the car is making boost, then its fine. Mine have been performing well since and I always get the cold start rattle.
Nothing to worry about.
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      05-27-2013, 07:21 PM   #17
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so even the new version of our turbos if you get them 2013 still have rattle?
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      05-29-2013, 05:29 PM   #18
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It's your actuators. I would go demonstrate to a technician the rattle you're still hearing. Just had my actuators replaced, off-throttle rattle is all gone for now.
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      05-29-2013, 09:11 PM   #19
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Quote:
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It's your actuators. I would go demonstrate to a technician the rattle you're still hearing. Just had my actuators replaced, off-throttle rattle is all gone for now.
Old thread --- but..... new turbos come pre-adjusted with new actuators.
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      05-30-2013, 05:44 AM   #20
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What does your comment mean by TC/ DIAG not needed for turbo replacement? This is the only reason that they won't even look at mine. I haven't thrown a code. How do I for force the car to throw a code?

T
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      05-30-2013, 09:17 AM   #21
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Quote:
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What does your comment mean by TC/ DIAG not needed for turbo replacement? This is the only reason that they won't even look at mine. I haven't thrown a code. How do I for force the car to throw a code?

T
The N54 turbos are no longer on the "restricted" parts list, meaning no authorization from the Technical support department (PUMA TC) is needed. BMW still watches these expensive warranty repairs closely, though.

But typically, the wastegate extended warranty is to cover "failure" of the wastegate on the turbo. To me, that means it doesn't work as it should (binding, etc.) and causes a 30FF boost fault code. If it's just noise due to some wear in the system, that could be a fight.
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      05-30-2013, 03:25 PM   #22
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Quote:
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Old thread --- but..... new turbos come pre-adjusted with new actuators.
C'mon man... post before mine is only 3 days ago
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