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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 > Wastegate Rattle after downpipes? Fix?



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      09-11-2009, 01:01 PM   #1
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Wastegate Rattle after downpipes? Fix?

I have had my aftermarket downpipes on for about a month now. As soon as I installed them and turned on the car, there was a loud metal rattle.

Sounds like the infamous wastegate rattle. The thing is my car never made this sound with the stock downpipes. I can only assume that the stock downpipes do a good job of muffling out the sound somehow.

I obviously want it fixed, but I doubt the dealer will perform warranty work on my turbos with aftermarket downpipes. So I guess I will need to put my stock downpipes back on, but I am worried that the wastegate rattle sound will again be muffled and unheard with the stock downpipes

Has anyone else been in this situation or have any insight?
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      09-11-2009, 02:08 PM   #2
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I had somethign like this when I got rid of my secondary cats, but it just turned out to be that the pipes attaching to the headers were loose. I tightened the bolts up and I have not had an issue with it anymore
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      09-11-2009, 02:11 PM   #3
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Check the install first. Dps have been known to enhance wastegate rattle. Do you have a tune?
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      09-12-2009, 01:52 PM   #4
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Quote:
Originally Posted by rooster3.0 View Post
Check the install first. Dps have been known to enhance wastegate rattle. Do you have a tune?
I am almost certain it is the downpipes, because when I first turn on the car the sound is very distinct and loud. But then slightly quiets down. I figure if it was something with the install the sound would be constant.

And nope, no tune.
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      09-12-2009, 02:00 PM   #5
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it's not a wastegate rattle... most likely the Dp's are either...

A- touching each other and need to be adjusted

B- bolts on dp's are not tight enough

C- DP's are touching heat shield on passenger side (very common)

Hope that helps u out
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