Installing Engine
- Possible danger of injury or damage (swollen hoses, skin irritation, danger of slipping, etc.)
→ Before lines are opened, place a cloth underneath them!
→ Components that come into contact with ATF must be cleaned IMMEDIATELY with water!
→ Take appropriate protective measures (e.g. use gloves, safety goggles, oil binding material)
→ Collect emerging ATF!
- Moisture penetrated into the refrigerant system.
- Soiling of refrigerant circuit.
- Risk of saturation and irreparable damage to desiccator.
- If the desiccator has disintegrated, the desiccator, compressor and evaporator may be damaged.
→ If the air humidity is too high and if the refrigerant circuit is open for some time, it will be necessary to replace the desiccator.
Information
- Set the steering wheel with the wheels in straight-ahead position. To do this, engage the steering column lock or clamp the steering wheel in center position with a steering-wheel holder. If this is not done, the airbag contact unit will have to be moved to center position after installation of the steering gear. → 945019 REMOVING AND INSTALLING STEERING-COLUMN SWITCH
Information
The tightening specifications for the basic engine are stored centrally (→ 1001IN TIGHTENING TORQUES, TIGHTENING SEQUENCES, ASSEMBLY OVERVIEWS ).
Tightening torques and assembly instructions for other assemblies (e.g. chassis, electrics, transmission or body) or for peripheral engine equipment can be found in the corresponding documents.
Information
- Due to currently correct tightening specifications, the screw specifications can be found in the corresponding repair descriptions for the assemblies chassis, transmission, electrics, etc.
- Guide the engine in under the vehicle.
Information
Check the position of all lines, hoses and cables again during and following installation. Make sure that:
- The lines, hoses and cables are not installed twisted (markings on steel flexi-pipes!)
- The lines, hoses and cables are not exposed to any mechanical strain from the outside while driving, i.e. they must not be over-strained or deformed.
- The lines, hoses and cables are not rubbing against other moving components.
- The lines, hoses and cables cannot become clamped.
- 1.1. Move engine under the vehicle using the lifting platform.
- 1.2. Position the wheels of the lifting platform to the position marked during removal.
- 1.3. Guide the engine up into the engine compartment using the lifting equipment.
- 1.4. Push the PDCC hose to one side while raising the engine.
- 1.5. Fit the locking cable at half height (easier to access).
→ 371319 REMOVING AND INSTALLING LOCKING CABLE
- 1.5.1. Pull the locking cable down and engage it in the support.
- 1.5.2. Fit parking lock cable at the ball joint on the transmission.
- Fit front-axle carrier. For tightening torques and other details, see: → 400619 REMOVING AND INSTALLING FRONT-AXLE CARRIER
- 2.1. By adjusting the position of the lifting platform slightly, move to the marking -arrows- for the contact points for the front-axle carrier on the longitudinal members.
- 2.2. Fit fastening screws securing front-axle carrier to the longitudinal members on both sides.
- Fit fastening screws -arrows-
on the rear transmission mount.
For tightening torques and other details, see: → 373837 DISASSEMBLING AND ASSEMBLING TRANSMISSION SUPPORT
- Fit fastening screws -3 and 4-
securing the anti-roll bar to the supporting plate on both sides.
For tightening torques and other details, see: → 4X00IN TIGHTENING TORQUES FOR FRONT AXLE
- Fit transverse struts -2-
.
For tightening torques and other details, see: → 4X00IN TIGHTENING TORQUES FOR FRONT AXLE
- 5.1. Right side: Press rear wheel housing cover -1- down -arrow- and fit the transverse strut -2- between the supporting plate and door sill.
- 5.2. Left side: Fit transverse strut between the supporting plate and door sill.
- Fit the safety hooks -arrow- for the upper wishbone on both sides.
- Guide in and fit bolt on the lower control arm -arrow-
.
For tightening torques and other details, see: → 4X00IN TIGHTENING TORQUES FOR FRONT AXLE
- Remove wheel hub holder -1- on the lifting platform and remove assembly pins -2- on the wheel hub.
- Lower and push away engine lifting platform.
- Fit universal joint -1-
.
For tightening torques and other details, see: → 481519 REMOVING AND INSTALLING STEERING COLUMN
- 10.1. Pull universal joint -1- and lower part of steering column -arrow- downwards.
- 10.2. Fit clamping screw -2- .
- 10.3. For vehicles with Servotronic: Insert connector -3- .
- 10.4. Fit holder on cable of Servotronic connector.
- Fit heat protection panel -1-
between the universal joint for the steering gear and the primary catalytic converter.
- 11.1. Insert heat shield -1- .
- 11.2. Fit the fastening screws -2- .
- Fit PDK wiring harness.
- 12.1. Plug in connector on the end of the PDK wiring harness -2- on the transmission, lock it -1- and fit the retaining clip -3- .
- 12.2. Fit retaining clips -arrows- for the PDK wiring harness.
- 12.3. Guide in heat shield for PDK wiring harness and fit fastening screws -arrows- on the transmission.
- Fit reinforcement plate -1-
.
For tightening torques and other details, see: → 400619 REMOVING AND INSTALLING FRONT-AXLE CARRIER
- 13.1. Position reinforcement plate -1- .
- 13.2. Screw in fastening screws -2- .
- Left side: Fit return hose for hydraulic oil cooler.
- 14.1. Connect return hose -2- on the hydraulic oil cooler.
- 14.2. Screw in fastening screw -1-
between the hose clamps.
Information
Working with steel flexi-pipes
- Steel flexi-pipes are particularly prone to kinking and pinching.
- Be particularly careful with steel flexi-pipes during removal, storage and reinstallation.
- Mark the installation position of the pipe with a paint marker during removal.
- Steel flexi-pipes must never be installed twisted.
- Left side: Fit steel flexi-pipe to the expansion hose. → Steel flexi-pipe to expansion hose
- 15.1. Fit steel flexi-pipe to the expansion hose. Use the marking as a guide.
- Connect cable plugs to the horn on both sides.
- Fit the wastegate valves -arrow- to the charge-air coolers on both sides. Tighten clamps -1- .
- Fit suction hose -arrow- on both sides by tightening the hose clamps -arrow- .
- Fit pressure hose on the charge-air cooler on both sides. → Pressure hose on charge-air cooler
- Lower the vehicle halfway.
- Right wheel housing: Fit fastening nut -arrow-
on the ground cable for the engine at the frame carrier.
→ Tightening torque: 10 Nm (7.5 ftlb.)
Information
Working with steel flexi-pipes
- Steel flexi-pipes are particularly prone to kinking and pinching.
- Be particularly careful with steel flexi-pipes during removal, storage and reinstallation.
- Mark the installation position of the pipe with a paint marker during removal.
- Steel flexi-pipes must never be installed twisted.
- Fit steel flexi-pipes on the PDCC valve block at the front.
- 22.1. The installation position of the steel flexi-pipes -2- was marked on the steel flexi-pipes and on the valve block during removal -3- .
- 22.2. Fit cap screws on steel flexi-pipes -1- and screw them in until the markings are aligned.
- Left wheel housing: Fit fastening nut on holder for power-steering pressure line. → Fastening nut on holder
- Fit chassis components.
- 24.1. Fit fastening nuts -1- on the upper control arms at both sides.
- 24.2. Fit fastening nut on connecting link -arrow- at the spring strut on both sides.
- 24.3. Fit fastening nut -1- on the lower control arm at both sides.
- Connect plug connection for rpm sensor -arrow- on both sides.
- Disconnect the secured coolant hoses and pressure hoses for the charge-air cooler from the lock carrier. → Securing hoses
- 26.1. Fit coolant hoses on the engine block on both sides. → Coolant hoses
- Clip wastegate control lines to the coolant lines on both sides.
- Fit hose clamps on the air box -arrows- at both sides.
- Secure refrigerant lines.
- 29.1. Connect the refrigerant line near the left longitudinal member.
Fit line -3- and screw in fastening screws -1 and 2- .
- 29.2. Guide in the refrigerant line and secure it at two clips. Screw in fastening screw -2- on the condenser.
- 29.1. Connect the refrigerant line near the left longitudinal member.
- Fit hose for hydraulic oil tank. → Hose for hydraulic oil tank
- Fit hose for coolant reservoir -arrow- .
- Fit positive cable at the jump-lead starting point.
- 32.1. Release flap on jump-lead starting point. -arrow-
- 32.2. Fit positive cable for the battery at the jump-lead starting point.
- 32.3. Lock the flap for the jump-lead starting point.
- Fit breather hose on the bleeder valve -arrow- .
- Guide coolant hoses into the connection point and lock with the clip. -arrows-
- Secure vacuum line from the vacuum pump on the connection piece. -arrow-
- Insert the plug connections for the oxygen sensors -1- on both sides.→ 266519 REMOVING AND INSTALLING SECONDARY-AIR PUMP WITH BRACKET
- Install torque support.
NOTE: Aggressive fluids
- Risk of damage to components and surfaces
→ Do not spill fluids.
→ In the event of contact, wash the component or surface with water.
→ Replace components that are already damaged.
WARNING: Highly inflammable or explosive materials- Danger of fire or explosion
→ Avoid contact with hot parts or sources of ignition.
→ Use suction to remove ignitable vapors.
→ Attach warning sign in a clearly visible position.
- Fit new fuel low-pressure line.
- 38.1. Fit tank ventilation -2- and vacuum line -3- .
- Install wiring harness in the plenum panel.
- 39.1. Fit sleeve with wiring harness into the on-board panel. → Sleeve with wiring harness
- Install engine wire harness in the plenum panel.
- 40.1. Plug in connector on the DME control unit -2- and lock it -1- .
- 40.2. Secure the wiring harness to the DME control unit in the plenum panel and lock the relay safety hooks in the plenum panel on both sides. -arrows-