11 00 050 Removing and installing engine (M54)
Special tools required:
- 11 0 020
- 51 2 170
Disconnect negative battery lead.
Exhaust manifold 1-3 remains on engine during removal.
Observe specified tightening torque and safety precautions in all work steps.
Move engine hood into assembly position with special tool 51 2 170.
REMOVING AND INSTALLING ENGINE
| Work step | Note: |
|---|---|
| Remove gearbox REMOVAL & INSTALLATION (S5D 200G/S5D 250G/M52 or REMOVAL & INSTALLATION (GS6S37BZ SMG) . | After removing transmission, secure engine against tilting. |
| Remove intake filter housing | |
| Remove FAN COWL , | |
| . Remove both tension struts . See 51 23 265 REMOVING AND INSTALLING/REPLACING LEFT AND RIGHT GAS STRUT SHOCKS . |
|
| Unlock and disconnect plug on exhaust camshaft solenoid valve. | Due to risk of damage when lifting engine out. |
| Drain coolant from radiator, expansion tank and engine block. See 17 00 005 DRAINING OFF AND TOPPING UP COOLANT . | |
| Disconnect coolant hose for heater. | |
| Unlock coolant hoses and remove. | |
| Unlock vacuum hose from suction jet pump and detach. | |
| Disconnect battery positive lead at positive terminal. |
Remove electronics box cover.
Unlock and detach plug connections (1 and 2).
Release nut and remove grounding cable.
Pull relay carrier (3) completely up and out of electronics box.
REMOVING AND INSTALLING ENGINE
| Remove air pump . | |
| Pump back fuel and unlock and disconnect fuel line. | |
| Unlock line on tank venting valve and disconnect. | |
| Remove both oxygen control sensors . See Emission Control, Oxygen Sensor | |
| Remove both oxygen monitor sensors See Emission Control, Oxygen Sensor . | |
| Remove right heat shields. | |
| Release negative lead on engine support arm. | |
| Remove A/C COMPRESSOR DRIVE BELT . | |
| Release A/C compressor on bracket, lines remain connected, do not evacuate A/C system. | Do not remove A/C compressor, secure against falling down. |
| Remove exhaust manifolds 4-6. | With the transmission removed, exhaust manifold 4-6 can be removed without removing exhaust manifold 1-3. Engine support arm can remain on engine. |
| Suspend engine from special tool 11 0 020 and secure with lifting gear. Release engine mounts on left and right from above. Lift out engine slowly and carefully. |
Carry out removal of engine with assistance of a second person. |
Installation:
Observe specified tightening torque and safety precautions in all work steps.