Cylinder Head Assembly: Locations
Cylinder head, assembly overview
Cylinder head, assembly overview:
1 - Cylinder head cover
2 - Pressure regulating valve
^ For crankcase breather
3 - Vent hose
^ Via rear charge air pipe to exhaust turbocharger
4 - Filler cap
^ Replace seal if damaged
5 - Seal
^ Replace if damaged
6 - 10 Nm
^ Observe tightening sequence
7 - Cylinder head cover gasket
^ Replace if damaged or leaking
^ Seal with AMV17400401
^ Insert nubs in cylinder head holes
8 - 20 Nm
9 - Lifting eye
10 - Central connector
^ For pump/injector units
11 - 10 Nm
12 - From brake servo
13 - Tandem pump
^ For fuel and vacuum supply
14 - 25 Nm
15 - Supply hose
^ White or with white marking
^ Check for secure seating
^ Secure with spring-type clips
16 - Return hose
^ Blue or with blue marking
^ Check for secure seating
^ Secure with spring-type clips
17 - Seal
^ Replace
^ 1- or 2-part
18 - 20 Nm
19 - Ball head bolt, 8 Nm
20 - Bracket
^ For engine cover
21 - Lifting eye
^ With bracket for engine cover
22 - Cylinder head gasket
^ Replace
^ Note marking
^ After replacing, replace entire amount of coolant
23 - 20 Nm
24 - Cylinder head
^ Check for distortion
^ After renewing, replace entire amount of coolant
25 - 10 Nm
^ Replace
26 - Camshaft Position (CMP) sensor -G40-
^ To remove, unclip sealing grommet from rear toothed belt guard
27 - Glow plug
^ 15 Nm
28 - Pump/injector unit
^ Valves for pump/injector units, cylinders 1 to 4 -N240- to -N243-
29 - Cylinder head bolt
^ Observe sequence when loosening and tightening
Checking cylinder head for distortion
Special tools, testers and auxiliary items required
^ Straight edge
^ Feeler gauges
^ Maximum permissible distortion: 0.1 mm (minimum distance between linear measurements: 100 mm)
Note:
^ Do not rework diesel cylinder heads.
Cylinder head gasket identification
^ Part No = - arrow 1 -
^ Control code = - arrow 2 - (not significant!)
^ Holes = - arrow 3 -
Note:
^ Different thicknesses of cylinder head gasket are installed depending on the piston projection. When replacing the cylinder head gasket, install a new gasket with the same identification.