11 62 140 Removing and installing, sealing or replacing both exhaust manifolds with catalytic converter (M54)

WARNING: This page is about a different car, the 2003 BMW X5, 2002 BMW X5, and 2001 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Remove intermediate muffler, refer to 18 12 061 REPLACING INTERMEDIATE MUFFLER (M62, M54) .

Remove reinforcement plate, refer to FRONT AXLE SUPPORT .

CAUTION: The article "removing and installing reinforcement plate" contains important installation instructions. Protect stabilizer against paint damage.

Remove retaining bracket and rubber mount from stabilizer.

Detach left and right stabilizer from stabilizer.

Installation:

Replace nuts. Tightening torque, refer to TORQUE SPECIFICATIONS .

NOTE: The oxygen sensors are in danger of being damaged when the exhaust manifolds are removed and installed.

Remove oxygen control sensors, refer to 11 78 510 REPLACING OXYGEN CONTROL SENSOR (M52TU / M54 / M56) .

Remove cover for fuel injectors.

Fig 1: Removing Cover For Fuel Injectors

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Do not mix up oxygen monitor sensors for cylinders 1 to 3 and 4 to 6 at plug connection to wiring harness.

Mark plug connections.

Unclip the cable from the retainer. Disconnect plug connection. Unclip cable on rear side of engine from cable guide.

Remove oxygen monitor sensors, refer to 11 78 613 REPLACING BOTH OXYGEN MONITOR SENSORS (M52TU / M54 / M56) .

NOTE: Rear exhaust manifold with catalytic converter can only be removed after front exhaust manifold with catalytic converter has first been removed.

Remove front exhaust manifold with catalytic converter.

Remove rear exhaust manifold with catalytic converter.

Installation:

Clean sealing faces, replace gaskets.

Coat thread with copper paste -CRC-.

Replace nuts.

Tightening torque, refer to 11 62 1AZ in ENGINE - TIGHTENING TORQUES .