Removing and Installing/Replacing Both Exhaust Manifolds with Catalytic Converter (M54/X3)

11 62 140 - Removing and installing/replacing both exhaust manifolds with catalytic converter (M54/X3)





Necessary preliminary tasks:
- Remove microfilter compartment 51 71 080 Removing and Installing/Replacing Heater Bulkhead.
- Secure engine in installation position Securing Engine In Installation Position (M54).
- Remove exhaust system Service and Repair.
- Remove oxygen sensors.
- Lower front axle Lowering/Raising Front Axle Carrier.

Note:
It is not necessary to perform a wheel alignment on the front axle when the front axle is lowered.





Cylinders 1 - 3:
Remove oxygen sensor Replacing Oxygen Control Sensor (Cylinders 1-3)(3).
Release nut along line (4).
Feed out exhaust manifold (5) downwards.
Tightening torque: 11 62 1AZ [1][2]11 62 Exhaust Manifold.
Cylinders 4 - 6:
Remove oxygen sensor Replacing Oxygen Control Sensor (Cylinders 4-6)(2).
Release nut along line (6).
Feed out exhaust manifold (1) downwards.
Tightening torque: 11 62 1AZ [1][2]11 62 Exhaust Manifold:





Check exhaust system for leaks.
Check function of DME.