Valvetrain, assembly overview: Notes

1 - 10 Nm

2 - Intake camshaft

• Checking axial play Camshaft, checking axial play  under Camshaft, checking axial play 
• Removing and installing refer to Camshafts, removing and installing 
• Checking radial clearance using Plastigage, Wear limit: 0.1 mm
• Run-out: max. 0.01 mm

3 - Drive chain

• Mark direction of rotation before removing (installation position) refer to Camshafts, removing and installing 

4 - 10 Nm

5 - O-ring

• Replace
• Only vehicles with engine code: AWP, AWW

6 - Camshaft Adjustment Valve 1 N205

• Only vehicles with engine code: AWP, AWW
• Camshaft adjustment, checking refer to Camshaft adjustment, checking 

7 - 3 Nm

• Only vehicles with engine code: AWP, AWW

8 - Camshaft adjuster

• Only vehicles with engine code: AWP, AWW
• For vehicles with engine code AWD: Chain tensioner
• Before removing, secure using bracket for chain adjustment 3366 refer to Camshafts, removing and installing 
• Camshaft adjustment, checking refer to Camshaft adjustment, checking 

9 - Gasket

• Rubber/metal seal
• Replace

10 - Cylinder head

• Removing and installing, refer to Cylinder head, removing and installing 
• Reworking valve seat, refer to Valve seats, refacing 
• Resurfacing sealing surfaces Refacing cylinder head sealing surface 
• Sealing contact surfaces Double bearing cap contact surfaces, sealing  and Chain tensioner or camshaft adjuster/cylinder head contact surfaces, sealing 

11 - Valves

• Do not reface, Only lapping is permitted
• Valve dimensions Valve dimensions  under Valve dimensions 
• Exhaust valves with sodium filling: Observe note for disposal Double bearing cap contact surfaces, sealing  under Double bearing cap contact surfaces, sealing 

12 - Seal

• Replacing refer to Camshaft seals, replacing  .

13 - Hood

• For Camshaft Position (CMP) sensor G40
• Observe installed location

14 - Washer

• Conical

15 - 25 Nm

16 - Camshaft Position (CMP) sensor G40

• → - Repair Group 28

17 - 10 Nm

18 - 65 Nm

• Use counter-holder 3036 to loosen and tighten

19 - Camshaft sprocket

• Note installation position: Thin rib of camshaft gear points outward and cylinder 1 TDC marking is visible
• Note position when installing toothed belt, refer to Toothed belt, removing, installing and tensioning 

20 - Seal

• Replacing refer to Camshaft seals, replacing  .

21 - Valve guide

• Checking refer to Valve guides, checking 

22 - Valve stem seal

• Replacing, refer to Valve stem seals, replacing  .

23 - Valve spring

• Cylinder head removed: remove and install with Valve Spring Compressor 3362.
• Cylinder head installed:, refer to Valve stem seals, replacing 

24 - Valve spring plate

25 - Valve keepers

26 - Valve lifter

• Do not interchange
• With hydraulic valve clearance compensation
• Checking refer to Hydraulic valve lifters, checking 
• Place on running surface when setting down

• Before installing, check axial play of camshafts, refer to Camshaft, checking axial play 
• Lubricate contact surface

27 - Bearing cap for intake camshaft

• Installation position and installation sequence refer to Camshafts, removing and installing 

28 - Double bearing cap

• Must be located on alignment sleeves
• Lightly coat contact surface with Sealant AMV 174 004 01  and follow installation position and sequence refer to Camshafts, removing and installing 
• Seal contact surfaces of double bearing cap/cylinder head, refer to Double bearing cap contact surfaces, sealing 

29 - Exhaust camshaft bearing cap

• Installation position and installation sequence refer to Camshafts, removing and installing 

30 - Exhaust camshaft

• Checking axial play, refer to Camshaft, checking axial play 
• Removing and installing refer to Camshafts, removing and installing 
• Checking radial clearance using Plastigage, Wear limit: 0.1 mm
• Run-out: max. 0.01 mm