Home/Opel/Zafira/Opel Zafira B (2005-2011)/Repair manual/DOHC Petrol Engine/Cylinder Head

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Wiring diagrams Section: DOHC Petrol Engine

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Cylinder Head Opel Zafira B

DOHC Petrol Engine 1 illustration

Illustration

1. Cylinder head height
2. Installation height of valve guide
3. Installation height of valve
4. Valve seat width in cylinder head
5. Valve seat angle in cylinder head
6. Valve stem diameter
7. Valve seat angle at valve
8. Valve length
9. Valve head – diameter

Cylinder Head

Engine				Z 20 LET
Cylinder head height 1)			mm	134
Valve seat width in cylinder head
	Intake valve		mm	1.0 to 1.4
	Exhaust valve		mm	1.4 to 1.8
Valve seat angle in cylinder head				90°
Valve guide inside diameter
	Standard size		mm	6.000 – 6.012
	Oversize (0.075)		mm	6.075 – 6.090
Length of valve guide
	Intake valve		mm	44.70 – 45.30
	Exhaust valve		mm	34.70 – 35.30
Installation height of valve guide
	Intake valve		mm	13.7 – 14.0
	Exhaust valve		mm	13.7 – 14.0
Installation height of valves
	Standard size		mm	39.6 – 40.2
	Oversize (0.075)		mm	39.2 – 39.8

Engine				Z 20 LET
Valve length
	Standard size
		Intake valve (GM)	mm	101.90 – 102.30
		Exhaust valve (GM)	mm	92.05 – 92.45
	Oversize (0.075)
		Intake valve (GM K1)	mm	101.50 – 101.90
		Exhaust valve (GM K1)	mm	91.65 – 92.05
Ø Valve stem
	Standard size
		Intake valve (GM)	mm	5.955 – 5.970
		Exhaust valve (GM)	mm	5.945 – 5.960
	Oversize (0.075)
		Intake valve (GM K1)	mm	6.030 – 6.045
		Exhaust valve (GM K1)	mm	6.020 – 6.035

Engine			Z 20 LET
Valve stem play
	Intake valve	mm	0.030 – 0.057
	Exhaust valve	mm	0.040 – 0.067
perm. runout of the valve stem		mm	0.03
Ø Valve head
	Intake valve	mm	31.9 – 32.1
	Exhaust valve	mm	28.9 – 29.1
Valve seat angle at valve head			90° 40'
Valve rotator
	Intake valve		No code
	Exhaust valve		No code

Engine				Z 20 LET
Camshaft
	Cam lift
		Intake	mm	8.5
		Exhaust	mm	8.5

1

) Resurfacing of the cylinder head is not permitted.