Engine ­ Turbocharger Failure: Oil Supply Line Blockage SI B11 07 11 Engine

Technical Service Bulletin # 110711
Engine ­ Turbocharger Failure: Oil Supply Line Blockage
SI B11 07 11
Engine
July 2011
Technical Service
Date: 1107012010 BMW 750Li (F02) V8­4.4L Turbo (N63)

Page 156
SUBJECT
Turbocharger Failure: Oil Supply Line Blockage
MODEL
All
SITUATION
The customer complains of loss of performance and turbocharger noise.
CAUSE
The turbocharger oil supply may be restricted, causing oil starvation and resulting in the seizing of the turbocharger assembly.
PROCEDURE
Upon replacement of the turbocharger assembly, always remove and inspect the oil supply lines for blockage or restriction. Ensure that
the lines are not collapsed or kinked. Replace the lines if a blockage or restriction is detected. Inspection of the oil supply lines will avoid
repeated failure of the turbocharger assembly.
WARRANTY INFORMATION
This service information bulletin is intended to provide technical diagnostic and/or repair information only.
If a warranty claim results from the above repairs, it should be submitted following the regular warranty claim procedures..
Disclaimer