Cylinder Head Overview

Cylinder Head Overview

• When installing a replacement cylinder head, all of the contact surfaces between the hydraulic lash adjusters, roller rocker arms and cam running surfaces on the camshafts must be lubricated before installing the cylinder head cover.

• The plastic protectors installed to protect the open valves must only be removed immediately before installing the cylinder head.

• If the cylinder head is going to be replaced, then it is also necessary to replace all the coolant.

• Remanufacturing diesel cylinder heads is not permitted.

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






1 Cylinder Head Gasket

• Replacing => [ Cylinder Head ] Cylinder Head.

• Identification, refer to => [ Cylinder Head Gasket Identification ].

• Installed position: The part number faces toward the cylinder head.

• Replace the coolant after replacing.

2 Bolt

• 9 Nm

3 Bolt

• 75 Nm

• Loosen and tighten using the retainer (3036). Refer to => [ Loosening and Tightening the Toothed Belt Pulley Bolt ].

4 Toothed Belt Pulley

• Loosen and tighten the bolt using the retainer (3036). Refer to => [ Loosening and Tightening the Toothed Belt Pulley Bolt ].

• Remove using the puller (T10320). Refer to => [ Removing the Toothed Belt Pulley ].

5 Rear Toothed Belt Guard

6 High Pressure Fuel Pump Toothed Belt Sprocket Seal

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

7 Seal

• Always replace.

8 Banjo Bolt

• 15.5 Nm

9 Fuel Rail (High Pressure Reservoir)

• Note the rules of cleanliness. Refer to => [ Clean Working Conditions and Fuel System Work Instructions ] Clean Working Conditions and Fuel System Work Instructions.

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

• Tighten the high pressure lines to the fuel rail. Refer to => [ Tightening the High Pressure Line to the Fuel Rail using a 19 mm Wrench ] Cylinder Head Cover Overview.

10 Bolt

• 23 Nm

11 Coolant Ventilation Line

• Illustration does not correspond to the version in the vehicle.

12 Bolt

• Always replace.

• Follow the sequence when loosening, refer to => [ Loosen the cylinder head bolts in sequence. ] Cylinder Head.

• Note the tightening sequence, refer to => [ Tighten the new cylinder head bolts in sequence as follows: ] Cylinder Head.

13 Lifting Eye

14 Bolt

• 23 Nm

• M8

15 Bolt

• 9 Nm

• M6

16 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 ] Cylinder Head.

• Checking for distortion. Refer to => [ Checking the Cylinder Head for Distortion ].

• Do not rework diesel cylinder heads.

• Installing, refer to => [ Installing ] Cylinder Head.

• Replace the coolant after replacing.

Loosening and Tightening the Toothed Belt Pulley Bolt





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

Removing the Toothed Belt Pulley





- Remove the toothed belt pulley using the puller (T10320).

Checking the Cylinder Head for Distortion





- Check the cylinder head at multiple points for distortion, using a straight edge and feeler gauges.

• 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 heads cannot be interchanged because they each have a different shape.