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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

View Poll Results: What condition are your turbos in?
How many miles are on your engine? 2 100.00%
Has your turbine wastegate developed a rattle? 1 50.00%
Have you fixed the turbine wastegate rattle? 1 50.00%
Multiple Choice Poll. Voters: 2. You may not vote on this poll

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  #1  
Old 03-11-2014, 03:39 PM
Eurobahn Motorsports Eurobahn Motorsports is offline
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N54 Turbo - Does your Wastegate rattle?

We have recently serviced an N54 unit due to both turbine wastegates having developing a rattle. Although the internal components appeared to be in fair shape, both turbos had an audible rattling noise upon activation of the vacuum actuated wastegates.
With this becoming a common issue with the N54 engine, we thought it would be a good idea to see what sort of solutions the Bimmerfest community has come up with.

Although we replaced both defective turbos with new factory units, we were curious if someone may have gone a different root.
Drilling into the turbine housing to install a regular boost pressure controlled wastegate would certainly be an option.
Fitting aftermarket turbos without the internal wastegate can also be considered.

Besides these options, has anyone considered or embarked on a different solution to this issue?

Post your pictures, illustrations and comments and let us see how everyone has come to deal with this problem!
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Last edited by Eurobahn Motorsports; 03-11-2014 at 03:46 PM. Reason: small error correction
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  #2  
Old 03-11-2014, 04:32 PM
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thekurgan thekurgan is offline
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Mein Auto: S65B40 Powered
So what does cause the rattle? Is it a moving part against a moving part? Is it the actuator? Is it shoddy materials?
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Old 03-12-2014, 06:50 PM
Airbus320 Airbus320 is offline
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Location: Florida
 
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There are several post to do with this issue on here . Some mention just disconnecting the valve / unplugging it. Apparently does no harm nor does it trip any sensors . I have the same problem and would love to find out how to correct it .
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actuate, boost, drill, n54, pressure, rattle, turbo, vacuum, wastegate


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