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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 > N54 Engine Knocking noise (Video)



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      10-19-2015, 12:30 AM   #45
apme123
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Drives: 2002 Honda S2000
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Quote:
Originally Posted by P7X View Post
The motor was rebuilt in May and I thought the car was running as strong as ever after the break in period.... She runs well except the small fact of eating through a liter of oil every 1000 kms... BMW has been very good about it and the car goes in soon for its 4th time to see what the oil is doing, check the oil, check the oil cooler, check for leaks (no leaks found so far). They're not sure what the issue is at the moment but they continue to back their work.

We'll see.
Sounds like the motor was contaminated by metal. When the bearing gets eaten the little tiny metal particles go everywhere, sometimes they get as small as a grain of fine sand. The metal particles can and do make other components wear out super fast, plus they will clog tiny oil passages in the pistons too.

Hope all of it goes well.
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