TSBs

Smoke Present in Exhaust of BMW Turbo

Nov. 29, 2021

This bulletin applies to BMW vehicles equipped with a turbocharged N20 or N26 engine.

This bulletin applies to BMW vehicles equipped with a turbocharged N20 or N26 engine (example: 2016 528i xDrive) where smoke from the exhaust is noticed when starting a cold engine. The smoke may be present for 10 to 20 seconds.

When the vehicle is parked overnight, the engine oil pressure will equalize and may leak past the turbocharger exhaust side turbine seal.

Replace the engine oil feed line to the turbo using P/N 11 42 8 648 368. The new oil supply line will incorporate a check valve on the engine side of the engine oil feed line that will eliminate the engine oil pressure equalization via the turbo exhaust side turbine seal.

About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

About the Author

Mike Mavrigian | Motor Age Editor

Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.