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Elsa online. ElsaWin. ElsaWeb. VW trucksPower unit5-cylinder diesel engineEngine cylinder head, valve gearValve gearAssembly overview - valve gear

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Assembly overview - valve gear
  Note
Cylinder heads with cracks between the valve seats may be used without reducing engine life, provided the cracks are small and not more than 0.5 mm wide.
   
1 -  Bolt
q   Renew after removing
q   8 Nm + 90°
2 -  Bolt
q   Renew after removing
q   Observe specified sequence when loosening and tightening → Chapter
q   20 Nm + 90°
3 -  Rocker arm shaft
q   Do not interchange.
4 -  Bucket tappet
q   Do not interchange.
q   With hydraulic valve clearance compensation.
q   Set down with contact surface facing downwards.
q   Oil contact surface.
q   Before installing, check camshaft axial clearance → Chapter.
5 -  Cotters
6 -  Valve spring plate
7 -  Outer valve spring
q   Removing and installing, with cylinder head removed: use valve spring compressor -2037-, with installed → Chapter.
8 -  Inner valve spring
q   Removing and installing, with cylinder head removed: use valve spring compressor -2037-, with installed → Chapter.
9 -  Valve stem seal
q   Renewing → Chapter.
10 -  Washer
q   For cylinder head bolts.
q   Insert in cylinder head before installing bearing caps
11 -  Valves
q   Valve dimensions → Chapter
q   Reworking valve seats → Chapter.
q   Checking valve guides → Chapter.
12 -  Unit injector
q   Removing and installing → Chapter.
13 -  Cylinder head
q   See note → Chapter.
q   Reworking valve seats → Chapter.
q   Removing and installing → Chapter.
14 -  Eccentric pin
q   Oil when installing.
q   Note installation position → Chapter.
15 -  Bolt
q   Renew after removing
q   20 Nm + 90°
16 -  O-ring
q   Renew after removing
17 -  Bolt
q   10 Nm
18 -  Cap
19 -  Washer
20 -  Compensating link plate
21 -  Drive gear
q   For camshaft.
q   Removing and installing → Chapter.
22 -  Guide sleeve
q   Oil when installing.
q   Note installation position → Chapter.
23 -  Bolt
q   Renew after removing
q   150 Nm + 90°
24 -  Tandem pump shaft
q   Checking tandem pump → Rep. gr.20
q   Removing and installing tandem pump → Rep. gr.20
25 -  Camshaft pulley
q   With camshaft position sender wheel.
q   Oil when installing.
q   Note installation position → Chapter.
26 -  Washer (diamond-coated)
q   Renew after removing
27 -  Bearing shell
q   Do not interchange used bearing shells (mark).
q   Ensure that retaining lugs are correctly seated in bearing caps and cylinder head
28 -  Camshaft
q   Checking radial clearance with Plastigage; wear limit: 0.11 mm.
q   Runout: max. 0.01 mm.
q   Identification and valve timing → Fig..
q   Checking axial clearance → Chapter.
q   Removing and installing → Chapter.
29 -  Bearing cap
q   Seal parting surfaces of outer bearing caps with silicone sealant -D 176 501 A1- → Fig.

   
Sealing parting surfaces of bearing caps 1 and 7 with silicone sealant -D 176 501 A1-
–  Apply thin, even coat of silicone adhesive sealant -D 176 501 A1- to sealing surface.
  N15-10029
Camshaft identification, valve timing
Identification
t  Cam base diameter: a = 52.8 mm.
t  Identification by stamped numbers and letters on drive-end face of camshaft.
  N15-0678
Drive end -arrow- 070 M

Valve timing at 1 mm opening lift
   
Inlet opens ATDC 12°
Inlet closes ABDC 21.5°
Exhaust opens BBDC 30°
Exhaust closes BTDC 20.5°

   


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