Mitsubishi 4G1 series Workshop Manual

4G1 ENGINE (E-W) -
Specifications
11A-1-2
PWEE9520
E
Nov. 1995Mitsubishi Motors Corporation
Item LimitStandard
Overall valve length SOHC 12-VALVE
Intake 100.75 100.25
mm
Exhaust 101.05 105.55
SOHC 16-VALVE
Intake 111.56 111.06
Exhaust 114.71 114.21
DOHC
Intake 106.35 105.85
Exhaust 106.85 106.35
Valve spring free SOHC 12-VALVE
Intake 46.1 45.6
height mm
Exhaust 46.8 46.3
SOHC 16-VALVE 50.9 50.4
DOHC 49.1 48.6
Valve spring load/ SOHC 12-VALVE
Intake 226/40.0 -
installed height N/
mm
Exhaust 284/39.6 -
mm
SOHC 16-VALVE 216/44.2 -
DOHC 177/40.0 -
Valve spring squareness 2
_
4
_
Valve seat contact width mm 0.9- 1.3 -
Valve guide internal diameter mm
SOHC 12-VALVE 6.6 -
SOHC 16-VALVE 5.5 -
DOHC 5.5 -
Valve guide projection mm
SOHC 12-VALVE 17.0 -
SOHC 16-VALVE 23.0 -
DOHC 23.0 -
Oil pump and oil pan
Oil pump tip clearance mm 0.06- 0.18 -
Oil pump side clearance mm 0.04- 0.10 -
Oil pump body clearance mm 0.10- 0.18 0.35
Pistons and connecting rods
Piston outside diameter mm
4G13 71.0 -
4G15 75.5 -
4G18 76.0 -
Piston ring side clearance mm
No. 1 ring 0.02- 0.06 -
No. 2 ring 0.02- 0.06 -
Piston ring end gap clearance
No. 1 ring 0.20- 0.35 0.8
No. 2 ring 0.35- 0.50 0.8
Oil ring 0.20- 0.50 1.0
Piston pin O. D. mm 18.0 -
Piston pin press-in load (at room temperature) N 4,900 - 14,700 -
Crankshaft pin oil clearance mm 0.02- 0.04 0.1
Connecting rod big end side clearance mm 0.10- 0.25 0.4
PWEE9520-A
E
Dec. 1998Mitsubishi Motors Corporation Revised

Mitsubishi 4G1 series Specifications

General

Brand	Mitsubishi
Model	4G1 series
Category	Engine
Language	English