Preliminary Work
Information
Before starting work, observe the Technical Information
> Refer to 153300 Symptom Engine - Loose/Broken Screws and/or Oil Leaks in the Timing Case Cover and/or Camshaft Adjuster Cover Area (SY 210/21) in the appropriate service information.
Information
For optimum assembly, turn the engine to "TDC" before disassembly.
Information
Seal open lines and hoses with suitable sealing plugs from the VAS 6122 - motor sealing plug set .
Information
- The number of screws, fastening clips, plug connections, holders and lines may vary depending on the engine variant and equipment.
- The graphics for removal or installation are partly shown on a variant and may deviate from the actual situation.
- Naturally, some steps must always be carried out.
- Some of the repair illustrations show only one side of the vehicle.
- Disconnect the battery.
- Drain engine oil.
- Drain coolant.
- Remove refrigerant by suction.
- Remove front bumper.
- Remove the cover for the throttle body completely with both molded hoses.
> 243519 REMOVE AND INSTALL CAP FOR THROTTLE BODY PART (Y-PIPE IN FRONT OF THROTTLE BODY)
- Completely disconnect the lock support panel and jumper with all radiators.
Radiator assembly with lock support panel and bumper - Example V6 Biturbo
In addition, carry out the following steps:
Unlock and pull off electric plug connections.
Unscrew fastening screws -1. 2- for refrigerant lines at the condenser.
Loosening fastening screws for refrigerant lines
- 7.3.1
Pull off refrigerant lines, close them off using a suitable stopper and set them aside.
Loosen and disconnect the clamp for the coolant hoses -Arrows- on the aluminium pipes for the thermostat housing at both sides
Coolant hoses
- 7.4.1 Catch escaping coolant.
- 7.4.2
Close off openings using suitable stoppers.
Unlock and disconnect the electrical connector of the electric fan.
Electric fan electric plug connection
Release wire harness at the cooling fan housing -1 to 4- .
Unclipping wire harness
Remove hydraulic lines to the power-steering radiator -1- .
Hydraulic oil lines
Loosen the ATF supply and -Arrows- return hoses and drain the oil.
Supply and return hose for transmission oil cooler
- 7.8.1
Collect leaking ATF and close lines with suitable plugs.
Remove complete radiator assembly with the help of another person.
- 7.3.1
Pull off refrigerant lines, close them off using a suitable stopper and set them aside.
- Loosen the three fastening screws -Arrows-
on the coolant pump belt pulley.
Fastening screws for coolant pump belt pulley
- Remove drive belt.
- Remove the coolant pump belt pulley.
- Remove both cylinder head covers
- Turn engine to TDC of cylinder 1.
- Remove belt pulley.
> 137619 REMOVE AND INSTALL BELT PULLEY (VIBRATION DAMPER)
Before removing the belt pulley, make sure that the stakeout hole of the belt pulley is aligned with the recess in the chain housing cover.
Remove belt pulley with friction plate.
- V6 Biturbo: 9861 - Staking tool for
timing must be fitted on the camshafts of both cylinder banks.
Tighten screws with 20 Nm (15 ftlb.).
Staking tool 9861
- V6 3.6 and V8: 9678/1 - Staking tool
must be fitted on the camshafts of both cylinder banks. Then fit screws by hand.
Staking tool 9678/1
- Remove the crankshaft sealing flange and the belt pulley.
> 137419 REMOVE AND INSTALL CRANKSHAFT SEALING RING FOR BELT PULLEY/VIBRATION DAMPER
Replace sealing flange during installation
- Remove turbocharger suction and pressure hose on cylinder bank 1.
- Remove generator.
- Remove chain tensioner.
- Remove oil pressure indicator with adapter.
Information
Before starting work, observe the Technical Information
> Refer to 153300 Symptom Engine - Loose/Broken Screws and/or Oil Leaks in the Timing Case Cover and/or Camshaft Adjuster Cover Area (SY 210/21) in the appropriate service information.
Information
For optimum assembly, turn the engine to "TDC" before disassembly.
Information
Seal open lines and hoses with suitable sealing plugs from the VAS 6122 - motor sealing plug set.
Information
- The number of screws, fastening clips, plug connections, holders and lines may vary depending on the engine variant and equipment.
- The graphics for removal or installation are partly shown on a variant and may deviate from the actual situation.
- Naturally, some steps must always be carried out.
- Some of the repair illustrations show only one side of the vehicle.
- Disconnect the battery.
- Drain engine oil.
- Drain coolant.
- Remove refrigerant by suction.
- Remove front bumper.
- Remove the cover for the throttle body completely with both molded hoses.
> 243519 REMOVE AND INSTALL CAP FOR THROTTLE BODY PART (Y-PIPE IN FRONT OF THROTTLE BODY)
- Completely dismantle the lock support panel and bumper with all radiators.
Radiator assembly with lock support panel and bumper - Example V6 Biturbo
In addition, carry out the following steps:
Unlock and pull off electric plug connections.
Unscrew fastening screws -1. 2- for refrigerant lines at the condenser.
Loosening fastening screws for refrigerant lines
- 7.3.1
Pull off refrigerant lines, close them off using a suitable stopper and set them aside.
Loosen and disconnect the clamp for the coolant hoses -Arrows- on the aluminium pipes for the thermostat housing at both sides
Coolant hoses
- 7.4.1 Catch escaping coolant.
- 7.4.2
Close off openings using suitable stoppers.
Unlock and disconnect the electrical connector of the electric fan.
Electric fan electric plug connection
Release wire harness at the cooling fan housing -1 to 4- .
Unclipping wire harness
Remove hydraulic lines to the power-steering radiator -1- .
Hydraulic oil lines
Loosen the ATF supply and -Arrows- return hoses and drain the oil.
Supply and return hose for transmission oil cooler
- 7.8.1
Collect leaking ATF and close lines with suitable plugs.
Remove complete radiator assembly with the help of another person.
- 7.3.1
Pull off refrigerant lines, close them off using a suitable stopper and set them aside.
- Loosen the three fastening screws -Arrows-
on the coolant pump belt pulley.
Fastening screws for coolant pump belt pulley
- Remove drive belt.
- Remove the coolant pump belt pulley.
- Remove both cylinder head covers
- Turn engine to TDC of cylinder 1.
- Remove belt pulley.
> 137619 REMOVE AND INSTALL BELT PULLEY (VIBRATION DAMPER)
Before removing the belt pulley, make sure that the stakeout hole of the belt pulley is aligned with the recess in the chain housing cover.
Remove belt pulley with friction plate.
- Fit 9678/1 - staking tool
on the camshafts of both cylinder banks and fit screws by hand.
Staking tool 9678/1
- Remove the crankshaft sealing flange and the belt pulley.
> 137419 REMOVE AND INSTALL CRANKSHAFT SEALING RING FOR BELT PULLEY/VIBRATION DAMPER
Replace sealing flange during installation
- Remove turbocharger suction and pressure hose on cylinder bank 1.
- Remove generator.
- Remove chain tensioner.
- Remove oil pressure indicator with adapter.