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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Boost leak?



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      06-10-2019, 12:12 AM   #1
An20Olives
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Drives: 09 335i, 11 335xi, 17 X3 M40i, 15 M4, 25 M3CX
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2015 BMW M4  [10.00]
2017 X3 M40i  [8.50]
Post Boost leak?

Hey all so recently after blowing off my VRSF chargepipe my car has developed a loud whistle under WOT on the driver's side. I've made sure to tighten everything down to resistance and behind the bead of the couplers, I used the o-ring that came with the pipe, and I have tightened the meth bungs which made an improvement.

I got underneath today to check the FMIC couplers which are stock and couldn't find anything loose or broken on either side. I'm going to poke around tomorrow again to double check and try to get a leak test done.

Car is meeting boost targets and is continuing to boost and pull strong, running MHD Stage 1+ car is relatively stock. Any thoughts? Normal noise or boost leak hunt
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