Removing and Installing/Replacing Front Exhaust Manifold (M54/N52)

18 40 050 - Removing and installing/replacing front exhaust manifold (M54/N52)





Necessary preliminary tasks:
- Secure engine in installation position

- Remove reinforcement plate Service and Repair

- Remove complete exhaust system Service and Repair

- Detach grounding cable from body.

- Remove right engine support arm with engine mount

- M54: Remove air pump.





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

Remove front control sensor.





M54: Remove cover from injection valves.

Note:
Do not mix up monitor sensors for cylinders 1 to 3 and 4 to 6 at plug connection to wiring harness.
Mark plug connections.
Unclip cable from holder. Disconnect plug connection. Unclip cable on rear side of engine from cable guide.

Remove monitor sensor from cylinders 1 to 3.





Unscrew nuts.
Remove exhaust manifold (1).

Installation:
Clean sealing faces, replace gaskets.
Replace nuts.
Tightening torque 11 62 1AZ [1][2]11 62 Exhaust Manifold.