11 00 050 Removing and installing/replacing engine (N63)

Special tools required:

11 0 020

Necessary preliminary tasks:

Disconnect negative BATTERY lead.
Move engine compartment lid into service position. See 51 00... SERVICE POSITION OF ENGINE COMPARTMENT LID .
Drain COOLANT .
Remove expansion tank(s) . See 17 11 100 REMOVING AND INSTALLING/RENEWING COOLANT EXPANSION TANK (N63) and 17 13 020 REMOVING AND INSTALLING/REPLACING INTERCOOLER EXPANSION TANK (N63)
Draw off A/C SYSTEM .
Remove right suspension cross-brace. See 51 71 346 REMOVING AND INSTALLING/REPLACING RIGHT (REAR) SUSPENSION CROSS-BRACE .
Remove radiator. See 17 11 000 REMOVING AND INSTALLING RADIATOR (N63 B40/B44 O 0/1) .
Remove both INTAKE SILENCER HOUSINGS .
Disconnect coolant hoses from engine.
Disconnect coolant hoses from charge air cooler.
Disconnect line from tank vent valve.
Detach POWER STEERING PUMP from holder.
Remove UNIVERSAL JOINT .
Remove transmission . See applicable procedure for drivetrain configuration:23 00 018 REMOVING AND INSTALLING TRANSMISSION (GS6-53BZ) (N63) , 24 00 034 REMOVING AND INSTALLING AUTOMATIC TRANSMISSION (GA8HP70Z) N63 or 24 00 034 REMOVING AND INSTALLING AUTOMATIC TRANSMISSION (GA8HP70Z) N63 AWD .
Remove FRONT AXLE DIFFERENTIAL (AWD only).
Remove BEARING SUPPORT (only four-wheel drive).

Open cover.

Release screw (1).

Tightening torque 12 42 3AZ .

Remove positive battery cable lead (2) from positive battery connection point.

Release positive battery cable (2) from clamps (3).

Fig 1: Identifying Positive Battery Cable Lead And Clamps

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Release wiring harness (1) from electronics box (2) and secure on engine against falling off.

Fig 2: Identifying Wiring Harness From Electronics Box

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Release wiring harness from supplementary electronics box (1) and secure on engine against falling off.

Fig 3: Identifying Supplementary Electronics Box

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Slacken nut (1).

Remove battery earth lead (2).

Fig 4: Identifying Battery Earth Lead And Nut

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Unlock and detach vacuum line (1) from vacuum pump.

Fig 5: Identifying Vacuum Line Connection At Vacuum Pump

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Release screw (1).

Remove air conditioning line (2).

Fig 6: Identifying Air Conditioning Line And Screw

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Release and disconnect coolant hoses (1).

Illustration shows N57

Fig 7: Identifying Coolant Hoses

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Unfasten hose clamp (1).

Release screw (2).

Press off oil line from oil reservoir to intake pipe section with special tool to prevent oil from escaping.

Tightening torque 32 41 8AZ .

Installation note:

Replace hose clamp.

Fig 8: Identifying Hose Clamp And Screw

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Remove intake pipe section (1) in direction of arrow from holder (2).

Remove intake pipe in upward direction.

Fig 9: Removing Intake Pipe Section

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Unfasten hose clamp (1).

Detach coolant hose from water valve.

Release hose clamp and detach coolant hose (2).

Fig 10: Identifying Hose Clamp And Coolant Hose

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Unlock and disconnect fuel delivery line (1), seal off with special tool 13 5 160.

Seal off fuel delivery line (2) with special tool 13 5 162.

Fig 11: Sealing-Off Fuel Delivery Lines Using Special Tools

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Undo screw (1), tightening torque 17 22 4AZ .

Detach oil lines from oil filter housing.

Catch and dispose of emerging oil.

Fig 12: Identifying Oil Pipes And Bolt

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Release screws (1) on engine mount on left and right. See applicable procedure for drivetrain configuration: 22 11 011 REPLACING LEFT ENGINE MOUNT (N63) , 22 11 001 REPLACING RIGHT ENGINE MOUNT (N63) , 22 11 011 REPLACING LEFT ENGINE MOUNT (N63) AWD and 22 11 001 REPLACING RIGHT ENGINE MOUNT (N63) AWD .

Fig 13: Identifying Screws On Engine Mount

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IMPORTANT: Before lifting the engine, the lifting lugs must be checked for damage (cracks) and to ensure they are seated securely.

Suspend special tool from lifting eyes (1) at front and rear.

11 0 020 Lift out engine with special tool.

Fig 14: Lifting Engine With Special Tool (11 0 020)

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Mount engine on assembly stand. See 11 00 MOUNTING ENGINE ON ASSEMBLY STAND (N63) .

Assemble engine.

Top up COOLANT and vent cooling system.

Check COOLING SYSTEM for leaks.