Engine - Turbocharger Failure Prevention
SI M11 03 08Engine
March 2011
Technical Service
This Service Information bulletin supersedes SI M11 03 08 dated January 2010.
[NEW] designates changes to this revision
SUBJECT
Turbocharger Failure - Oil Supply Line Blockage
MODEL
R55 (Cooper Clubman S) with N14 engine
R56 (Cooper S) with N14 engine
R57 (Cooper S Convertible) with N14 engine
Vehicles produced up to December 15th, 2009
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. In addition, a protective cover (Part # 11 65 7 603 484) should be installed on the supply line, as seen in the illustration below. [NEW] If a restriction is detected in the oil supply line, the engine oil and oil filter should be replaced as part of the repair.
Protective cover (1)
[NEW] WARRANTY
This bulletin is intended to provide technical diagnostic and repair procedure information.
Claims that result from the repair of a verified defect are to be processed following established warranty policies and procedures.