Cylinder Head Assembly: Locations

Assembly overview





Engine codes AEG, AVH, AZG

Engine codes AEG, AVH, AZG with steel plate cylinder head gasket

1- Plug
2- Seal
3- Breather housing
^ Turn to right to remove
4- 10 Nm





5- Seal
^ Replace if damaged
6- Bracket
7- Sealing plug, 15 Nm
^ Always replace
8- O-ring
^ Always replace
9- Union
10- Lifting eye
11- 20 Nm





12- Cylinder head gasket
^ Always replace
^ After replacement replace complete amount of coolant in system
13- 15 Nm
14- Rear toothed belt guard
15- Cylinder head
^ After replacement replace complete amount of coolant in system
16- Cylinder head bolt
^ Always replace





17- Oil deflector
^ Replace if damaged
^ Before installing gasket, coat transition between bearing cap and cylinder head with D 454 300 A2.
18- Cylinder head cover gasket
19- Cylinder head cover
20- Reinforcing strip
21- Rear upper toothed belt guard





Engine codes AEG, AVH, AZG with aluminum plate cylinder head gasket

1- Plug
2- To intake manifold
3- Shaped hose
4- To intake manifold
^ Only from model year 2002
5- O-ring
^ Always replace
6- Sealing plug
7- Cylinder head bolt
^ Always replace





8- Union
9- 10 Nm
10- O-ring
^ Always replace
11- 20 Nm
12- Lifting eye
13- Cylinder head gasket
^ Always replace
^ After replacement replace complete amount of coolant in system
14- 15 Nm
15- 20 Nm





16- Rear toothed belt guard
17- Tooth belt
^ Mark direction of rotation before removing
^ Check for wear
^ Do not kink
18- Cylinder head
^ After replacement replace complete amount of coolant in system





19- Oil deflector
20- Cylinder head cover gasket
^ Replace if damaged
^ Before installing gasket, coat transition between bearing cap and cylinder head with D 454 300 A2.
21- Cylinder head cover
22- 10 Nm
23- Seal





Engine code BBW
1- Cover
2- O-ring
^ Always replace
3- Camshaft Position (CMP) sensor -G40-
4- 9 Nm
5- To intake hose
6- Shape hose
^ Do not separate shape hose/intake hose
7- To intake manifold
8- Seal
^ Installed firmly onto item -9-
9- Sealing plug-15 Nm
^ Always replace





10- Cylinder head bolt
^ Replace
11- Union
12- 10 Nm
13- Seal
^ Always replace
14- 20 Nm
15- Lifting eye
16- Cylinder head gasket
^ Replace
^ After replacement replace complete amount of coolant in system





17- Cylinder head
^ After replacement replace complete amount of coolant in system
18- 15 Nm
19- Rear toothed belt guard
20- 20 Nm
21- Washer
^ Note Part No.
22- Toothed belt
^ Mark direction of rotation before removing





23- O-ring
^ Always replace
24- Valve -1- for camshaft adjustment -N205-
25- 9 Nm
26- Oil deflector
27- Cylinder head gasket
^ Replace if damaged
^ Coat cylinder head/bearing cap transition points with D 454 300 A2 before installing
28- Cylinder head cover
^ With cable guide
29- 10 Nm
30- Seal





Engine code BEV
1- Cover
2- Seal
3- 10 Nm
4- To intake manifold
5- Shape hose
^ Not for engine code BEV
6- Shape hose
^ Do not separate shape hose/intake hose
7- To intake manifold
8- O-ring
^ Always replace





9- Sealing plug- 15 Nm
^ Always replace
10- Cylinder head bolt
^ Always replace
11- Union
12- 10 Nm
13- Seal
^ Always replace
14- 20 Nm
15- Lifting eye
16- Cylinder head gasket
^ Always replace
^ After replacement replace complete amount of coolant in system





17- 15 Nm
18- 20 Nm
19- Rear toothed belt guard
20- Toothed belt
^ Mark direction of rotation before removing





21- Cylinder head
^ Check for distortion
^ After replacement replace complete amount of coolant in system
22- Oil deflector
23- Cylinder head cover gasket
^ Replace if damaged
^ Coat cylinder head/bearing cap transition points with D 454 300 A2 before installing
24- Cylinder head cover
^ With cable guide





Fig. 1 Checking cylinder head for distortion
Max. permissible distortion: 0.1 mm (minimum distance between linear measurements: 100 mm)