Turbo keeps failing, 335 N54, bought 2 turbos already.

bimmerwith335 · 03-08-2024, 04:44 PM

One day I changed boost solenoid and went out to test a car, car was sluggish, turbo was whistling and as an outcome, turbo failed(shaft snapped in half and ate compressor wheel). after some time I bought new turbo assembly, rebuilt turbos and it failed within couple of minutes. symptoms were: car was not boosting, so slow, turbo whistling sound again, and it was rear turbo again. anyone has any Idea? I am afraid to fail 3rd turbo.

Bimmer_Bro · 03-10-2024, 10:18 PM

Quote:

Originally Posted by bimmerwith335

One day I changed boost solenoid and went out to test a car, car was sluggish, turbo was whistling and as an outcome, turbo failed(shaft snapped in half and ate compressor wheel). after some time I bought new turbo assembly, rebuilt turbos and it failed within couple of minutes. symptoms were: car was not boosting, so slow, turbo whistling sound again, and it was rear turbo again. anyone has any Idea? I am afraid to fail 3rd turbo.

I would check the oil line to the turbo. If it’s clogged or pinched….no oil to the turbo will pretty much kill it instantly.

oVeRdOsE. · 03-11-2024, 02:20 PM

Quote:

Originally Posted by Bimmer_Bro

I would check the oil line to the turbo. If it’s clogged or pinched….no oil to the turbo will pretty much kill it instantly.

agree, snapped turbo shaft often due to oil starvation.

lookalikehuuh · 03-12-2024, 01:09 AM

+3, sounds like your turbo lines might be clogged/pinched.

Have you replaced the lines with each turbo? Also where are you sourcing the replacement turbos?

whyzee125 · 03-12-2024, 11:38 AM

Way more info is needed but the above suggestions are good ones. I'd look there to start.

03-08-2024, 04:44 PM	#1
bimmerwith335 New Member 8 Rep 8 Posts Drives: BMW 335IS Join Date: Mar 2024 Location: United States iTrader: (0)	Turbo keeps failing, 335 N54, bought 2 turbos already. One day I changed boost solenoid and went out to test a car, car was sluggish, turbo was whistling and as an outcome, turbo failed(shaft snapped in half and ate compressor wheel). after some time I bought new turbo assembly, rebuilt turbos and it failed within couple of minutes. symptoms were: car was not boosting, so slow, turbo whistling sound again, and it was rear turbo again. anyone has any Idea? I am afraid to fail 3rd turbo.
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03-12-2024, 01:09 AM	#4
lookalikehuuh Lieutenant Colonel 1030 Rep 1,542 Posts Drives: 2006 330i, 2007 335i Join Date: Sep 2014 Location: San Diego, CA iTrader: (0)	+3, sounds like your turbo lines might be clogged/pinched. Have you replaced the lines with each turbo? Also where are you sourcing the replacement turbos?
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03-12-2024, 11:38 AM	#5
whyzee125 Brigadier General 2006 Rep 4,031 Posts Drives: Dinan stage 2 335i Join Date: Jul 2014 Location: Chattanooga Tn iTrader: (0)	Way more info is needed but the above suggestions are good ones. I'd look there to start.
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