Cylinder Head and Cover Overview

Cylinder Head and Cover Overview






1 Bracket

• For the fuel hose.

2 Bolt

• 10 Nm

3 Cap

• Replace the seal if damaged.

4 Cylinder Head Cover

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

5 Bolt

• 10 Nm

• With a spacer sleeve and seal.

• Replace the seal if it is damaged.

6 Cylinder Head Cover Gasket

• Replace if damaged or leaking.

• Pay attention to the installed position.

7 Lifting Eye

• With a retaining plate for the knock sensor connector.

8 Bolt

• 23 Nm

9 Intake Manifold Support

10 Bolt

• 23 Nm

11 Bolt

• 10 Nm

12 Bolt

• 10 Nm

13 Water Connection

• To the heater core.

14 Seal Ring

• Always replace.

• Pay attention to the installed position.

15 Chain Tensioner

• 50 Nm

• For the camshaft timing chain.

• Only rotate the engine with the chain tensioner installed.

16 Cover

• Can be removed and installed with the engine installed.

• Coat the sealing surfaces with silicone adhesive sealant (D 176 501 A1).

17 Seal

• For the camshaft adjustment valve 1 and the exhaust camshaft adjustment valve 1.

• Replace if damaged or leaking.

• Removing and installing, refer to => [ Cover Seal ] Cover Seal.

18 Bolt

• 8 Nm

19 Bolt

• 8 Nm

20 Coolant Pipe

• With retaining clips for the vacuum line.

21 Bolt

• 23 Nm

22 Guide Rail

• For the camshaft timing chain.

23 Bolt

• 23 Nm

• Install using liquid locking fluid (D 000 600 A2).

24 Water Connection

• Bolted onto the front of the cylinder head

25 O-ring

• Always replace.

26 Seal

• Always replace.

27 Cylinder Head Gasket

• Made of metal.

• Always replace.

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

• After replacing, replace the entire amount of coolant.

28 Cylinder Head

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

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

• After replacing, replace the entire amount of coolant.

29 Bolt

• Always replace.

• Before installing, coat the bolts with liquid locking fluid (D 197 300 A2). Refer to => [ Apply to each cylinder head bolt at the head contact surface area and insert the bolts. ] Cylinder Head.

• Follow the instructions and sequence when loosening. Refer to => [ Loosen the cylinder head bolts working from the outside to the inside in the sequence given and then remove them. ] Cylinder Head.

• Follow the instructions and sequence when tightening. Refer to => [ Tighten the cylinder head bolts in the specified sequence , starting from the inside and working toward the outside, as follows: ] Cylinder Head.

Checking the Cylinder Head for Distortion





Special tools, testers and auxiliary items required

• Straight Edge 500 mm (VAS 6075)

• Feeler Gauge

Max. permissible distortion: 0.05 mm