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Wiring diagrams Section: DOHC Petrol Engine

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Cylinder Head Opel Meriva A

DOHC Petrol Engine 1 illustration

Cylinder Head

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

Engine			Z 18 XE
Cylinder head height 1)		mm	135.85 - 136.0
Valve seat width in cylinder head
	Intake valve	mm	1.0 – 1.4
	Exhaust valve	mm	1.4 - 1.8
Valve seat angle in cylinder head			90° -30'
Valve guide inside diameter
	Standard size	mm	5.000 - 5.012
	Oversize (0.075)	mm	5.075 - 5.087
	Oversize (0.150)	mm	5.150 - 5.162
Length of valve guide
	Intake valve	mm	38.7 – 39.3
	Exhaust valve	mm	38.7 – 39.3
Installation height of valve guide
	Intake valve	mm	10.7 – 11.0
	Exhaust valve	mm	10.7 – 11.0
Installation height of valves
	Standard size	mm	38.5 - 39.2
	Oversize (0.075)	mm	38.1 - 39.6
	Oversize (0.150)	mm	38.1 - 39.6

Engine				Z 18 XE
Valve length
	Standard size
		Intake valve (GM)	mm	101.2 - 101.6
		Exhaust valve (GM)	mm	100.56 - 100.96
	oversize (0.075)
		Intake valve (GM K1)	mm	100.8 - 101.2
		Exhaust valve (GM K1)	mm	100.16 - 100.56
	oversize (0.150)
		Intake valve (GM K2)	mm	100.8 - 101.2
		Exhaust valve (GM K2)	mm	100.16 - 100.56
Ø	Valve stem
	Standard size
		Intake valve (GM)	mm	4.955 – 4.970
		Exhaust valve (GM)	mm	4.935 – 4.950
	Oversize (0.075)
		Intake valve (GM K1)	mm	5.030 – 5.045
		Exhaust valve (GM K1)	mm	5.010 – 5.025
	Oversize (0.150)
		Intake valve (GM K2)	mm	5.105 – 5.120
		Exhaust valve (GM K2)	mm	5.085 - 5.100

Engine				Z 18 XE
Valve stem play
		Intake valve	mm	0.030 – 0.057
		Exhaust valve	mm	0.050 - 0.077
perm. runout of the valve stem			mm	0.03
Ø Valve head
		Intake valve	mm	31.1 - 31.3
		Exhaust valve	mm	27.4 - 27.6
Valve seat angle at valve head				90° 40'
Valve rotator
		Intake valve		No code
		Exhaust valve		No code

Engine				Z 18 XE
Camshaft
	Cam lift
		Intake	mm	8.50
		Exhaust	mm	8.00

1

) Resurfacing of the cylinder head is not permitted.