11 00 598 Removing and installing engine on front axle (N63 O1) with GA8HP70Z transmission - AWD

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Special tools required:

24 2 390 .
24 4 131 .
24 4 138 .
31 2 247
31 2 240
31 2 242
31 2 246
11 0 020 .

Necessary preliminary tasks:

Remove FRONT AXLE with engine and transmission.
Remove PROPELLER SHAFT from between front axle and transfer box.

Screw fixtures (20) onto table lift at a suitable location.

Move screw adapter (30) with plate (80) up against the transmission oil sump (1).

Fig 1: Identifying Transmission Oil Sump, Fixtures, Plate, And Screw Adapter

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With Dynamic Drive only

Release holder (1).

Fig 2: Identifying Holder

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With Dynamic Drive only

Release holder (1) on power steering pump.

Tightening torque 32 41 14AZ .

Fig 3: Identifying Holder On Power Steering Pump

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With Dynamic Drive only

Release screws (3).

Tightening torque 32 41 13AZ .

Release screw (4).

Tightening torque 32 41 10AZ .

Installation note:

Align intake pipe by way of marking to power steering pump.

Make sure hydraulic lines are laid without tension and with sufficient distance to adjoining components.

Fig 4: Identifying Screws

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Release screw (1).

Tightening torque 13 62 4AZ .

Remove crankshaft sensor.

Disengage cable from holder (2).

Fig 5: Identifying Cable Holder And Screw

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Unlock and disconnect connector (1) by turning.

Fig 6: Disconnecting Connector
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Do not touch pins.
Release cable from brackets.
Insert special tool 24 2 390 in sealing cup.

Operations are described in:

NOTES ON MECHATRONICS .

IMPORTANT: Read and comply with important note.

Release screw (1).

Undo hydraulic line and holder.

Fig 7: Identifying Hydraulic Lines Mounting Screw

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Release screw (1).

Tightening torque 17 22 1AZ .

Disconnect hydraulic lines (2) to transmission oil cooler.

Release screw (1).

Loosen the hydraulic lines (2).

Installation note:

Replace sealing rings.

Note installation position.

Fig 8: Identifying Screw And Hydraulic Lines

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Recycling:

Catch and dispose of escaping oil with auxiliary materials.

Crank engine at vibration damper in direction of rotation until screw (1) is visible in recess.

Undo all 6 bolts on torque converter.

Tightening torque 24 40 1AZ .

Fig 9: Identifying Vibration Damper Screw

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Insert special tool 24 4 131 , 24 4 138 into recess in transmission housing.

Lock the torque converter by tightening the special tool.

Fig 10: Locking Torque Converter Using Special Tool (24 4 131 And 24 4 138)

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IMPORTANT: Do not release wishbone from swivel bearing with impact tool.
Make sure special tool rests correctly on steel bush of swivel bearing. The swivel bearing must be removed if the steel bushing moves.
Rubber boot of wishbone must not be damaged.
Do not pull stainless steel ring off journal.

Slacken nut (1) two to three thread turns.

If necessary, replace lower section 31 2 242 with lower section 31 2 247.

Press wishbone (2) with special tool 31 2 240) off swivel bearing.

Unscrew nut (1) and remove wishbone (2) from swivel bearing.

Installation note:

Keep wishbone to swivel bearing connection clean and free from oil and grease.

Fig 11: Pressing Wishbone

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Replace self-locking nut.

Tightening torque 31 12 4AZ .

Slacken nut (1) two to three thread turns.

If necessary, replace lower section 31 2 242 with lower section 31 2 247

Press tension strut (2) off swivel bearing using special tool 31 2 240.

Unscrew nut (1) and remove tension strut (2) from swivel bearing.

Installation note:

Keep tension strut to swivel bearing connection clean and free from oil and grease.

Fig 12: Removing Tension Strut From Swivel Bearing

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Replace self-locking nut.

Tightening torque 31 12 2AZ .

Slacken nut (1) two to three thread turns.

If necessary, replace lower section 31 2 242 with lower section 31 2 246

Press track rod end (2) off swivel bearing using special tool 31 2 240.

Unscrew nut (1) and remove track rod end (2) from swivel bearing.

Installation note:

Keep track rod end to swivel bearing connection clean and free from oil and grease.

Replace self-locking nut.

Tightening torque 32 21 3AZ .

Fig 13: Removing Track Rod End From Swivel Bearing

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Remove swivel bearing (1) with brake disc and drive shaft (3) with the aid of a workshop crane (2).

Do not bend output shaft (3) too far, note deflection angle.

The graphic shows the procedure on the left swivel bearing; the procedure on the right swivel bearing is identical.

Fig 14: Removing Swivel Bearing With Brake Disc And Drive Shaft Using Workshop Crane

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Release screw (1).

Lay ground strap (2) to one side.

Fig 15: Identifying Ground Strap And Screw

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Release screws.

Tightening torque 24 00 1AZ .

Unflange transmission.

Fig 16: Locating Transmission Screws

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Slightly raise engine with workshop crane and special tool 11 0 020 .

This simplifies removal and installation of transmission.

Fig 17: Lifting Engine With Workshop Crane And Special Tool (11 0 020)

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Disconnect transmission (2) from engine in the direction of arrow.

Fig 18: Disconnecting Transmission From Engine

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Unscrew nuts (1).

Raise engine.

Installation note:

Replace self-locking nuts.

Tightening torque 22 11 2AZ .

Fig 19: Identifying Nut

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Lift engine (1) with workshop crane (2) and special tool 11 0 020 from front axle.

Mount engine on ASSEMBLY STAND .

Fig 20: Lifting Engine With Workshop Crane And Special Tool (11 0 020)

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