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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > UK Technical Forum > N47 Excessive back pressure



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      10-21-2024, 04:19 PM   #1
Srobbo122
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N47 Excessive back pressure

Hi everyone,

I've got a 2011 318D automatic. I replaced my turbo as it was making noise. Under further investigation, I used soapy water and found an exhaust leak at the turbo's actuator arm. I have come to believe this is caused by excessive back pressure as there should be no pressure at this point.

I looked at the exhaust gas pressure it was at 30mbar at idle, did an on-car dpf clean and got this down to 6 mbar. But again still has the exhaust leak. Next cleaned the EGR valve and cooler no change. Finally changed the turbo for a second hand one, no change.

The car drives fine and has no fault codes. Has any one got any ideas?

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      10-30-2024, 08:13 AM   #2
Styvy
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Hey mate,

Do you have dpf? or gutted dpf? The place is something refered to as safety pin.
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