Mitsubishi 4G9 manual 7

11A-1-2	4G9 ENGINE (E–W) – Specifications
Items			Standard value	Limit
Cylinder head and valve
Cylinder head gasket surface flatness mm			Less than 0.03	0.2
Grinding limit of cylinder head gasket surface mm			–	0.2*
*Total resurfacing depth of both cylinder head and cylinder block
Cylinder head overall height mm		SOHC	119.9 – 120.1	–
		DOHC	131.9 – 132.1	–
		DOHC–MIVEC	119.8 – 120.0	–
		DOHC–GDI	131.9 – 132.1	–
Thickness of valve	SOHC	Intake	1.0	0.5
head (margin) mm
		Exhaust	1.3	0.8
	DOHC	Intake	1.0	0.5
		Exhaust	1.2	0.7
Valve overall height	SOHC	Intake	110.15	109.65
mm
		Exhaust	113.70	113.20
	DOHC	Intake	104.19	103.69
		Exhaust	103.87	103.37
	DOHC–MIVEC	Intake	115.63	115.13
		Exhaust	115.63	115.13
	DOHC–GDI	Intake	104.19	103.69
		Exhaust	103.87	103.37
Valve spring free length mm		SOHC (with lash ad-	50.9	49.9
		juster)
		SOHC (with adjust-	49.5	48.5
		ing screw)
		DOHC	45.0	44.0
		DOHC–MIVEC	51.5	50.5
		DOHC–GDI	44.8	43.8
Valve spring out-of-squareness			Max. 2_	4_
Valve stem to	valveExc pt DOHC–GDI	Intake	0.02 – 0.05	0.10
guide clearance mm	for PAJERO io
		Exhaust	0.05 – 0.09	0.15
	DOHC–GDI	Intake	0.02 – 0.05	0.10
	for PAJERO io
		Exhaust	0.04– 0.06	0.15
Valve seat valve contact width mm			0.9 – 1.3	–
Valve guide projection from cylinder head		SOHC	14.0	–
upper surface mm
		DOHC	19.0	–

E Mitsubishi Motors CorporationJun. 2002 PWEE9502-K Revised