Cylinder Head

Cylinder Head Overview

• The illustration shows the cylinder head for cylinder bank 2 (left side).





1 Cylinder Head

• Only set the removed cylinder head down on a foam pad. Otherwise the glow plugs can be damaged.

• Removing, refer to => [ Cylinder Head ] Service and Repair.

• Check for distortion.

• Do not rework diesel cylinder heads.

• Installing, refer to => [ Installing ] Service and Repair

• Replace the coolant after replacing.

2 Toothed Belt Drive Gear

• Loosen and tighten the central bolt using retainer (3036).

• Remove using puller (T10320).

3 Bolt

• 75 Nm

• Loosen and tighten using retainer (3036).

4 High Pressure Pump Toothed Belt Sprocket Seal

• Replacing, refer to => [ Camshaft Seal ] Service and Repair.

5 Bolt

• 9 Nm

6 Oil Dipstick Bracket

7 Coolant Ventilation Line

• Illustration does not correspond to version in vehicle.

8 Banjo Bolt

• 15.5 Nm

9 Bolt

• 23 Nm

10 Fuel Rail

• Note the rules of cleanliness. Refer to => [ Clean Working Conditions ] Fuel Supply.

• Do not change the angles of the high pressure lines.

• Tighten the high pressure line to the fuel rail. Refer to one of the following:

Using a 14 mm wrench, refer to => [ Tightening the High
Pressure Line to the Fuel Rail with a 14 mm Wrench ] Cylinder Head Overview.

Using a 19 mm wrench, refer to => [ Tightening the High
Pressure Line to the Fuel Rail with a 19 mm Wrench ] Cylinder Head Overview.

11 Seals

• Replace

12 Bolt

• Replace

• Observe the sequence for loosening, refer to => [ Loosen the cylinder head bolts in the sequence shown. ] Service and Repair.

• Note the tightening sequence, refer to => [ Tighten the cylinder head bolts in sequence as follows: ] Service and Repair.

13 Oil Check Valve

• Tighten to 25 Nm.

14 Lifting Eye

15 Bolt

• M6 - 9 Nm

• M8 - 23 Nm

16 Left Intermediate Pipe

• Removing and installing, refer to => [ Left Intermediate Pipe ] Left Intermediate Pipe.

17 Bolt

• 30 Nm + 90° (1/4) additional turn.

• Replace

• Lubricate with hot bolt paste. Refer to the parts catalog.

18 Gasket

• Replace

19 Cylinder Head Gasket

• Replacing, refer to => [ Cylinder Head ] Service and Repair.

• Identification.

• Installed position: the part number points toward the cylinder head.

• Replace the coolant after replacing.

Loosening and Tightening the Central Bolt for the Toothed Belt Drive Gear





- Loosen and tighten the central bolt - 1 - using (3036).

Removing the Toothed Belt Drive Gear





- Remove the toothed belt drive gear using (T10320).

Checking Cylinder Head for Distortion





- Check the cylinder head at multiple points for distortion, using a straightedge and feeler gauge.

• Max. permissible distortion: 0.1 mm

Cylinder Head Gasket Identification





1. Holes

2. Part number

• The cylinder head gaskets for the left and right cylinder head cannot be interchanged because they each have a different shape.