Valve Stem Seal Removal; Cylinder Head Inspection; Valves Inspection - Mitsubishi 4G1 series Workshop Manual

11A-9-4
Contact (must
be in center of
face)
E
E
Mitsubishi Motors Corporation
Mitsubishi Motors Corporation
4G1 ENGINE (E - W) -
AC" VALVE STEM SEAL REMOVAL
INSPECTION
1. CYLINDER HEAD
(1) Before cleaning the cylinder head, check it for water leaks,
(2) Remove all oil, water scale, sealant, and carbon. After
(3) Check for distortion in the cylinder head gasket surface
2. VALVES
(1) Check the valve face for correct contact. If contact is
(2) If the margin is less than specified, replace the valve.
Margin
6EN0542
Nov. 1995
Dec. 1998
Cylinder Head and Valves
gas leaks, cracks, and other damage.
cleaning the oil passages, blow air through them to verify
that they are not blocked.
using a straight edge and thickness gauge. If distortion
exceeds the specified limit, grind the gasket surface to
specification.
Gasket surface distortion
Standard value: 0.05 mm or less
Limit: 0.2 mm
Grinding limit: 0.2 mm
Cylinder head height (specification when new):
SOHC 12-VALVE: 106.9 - 107.1 mm
SOHC 16-VALVE: 119.9 - 120.1 mm
DOHC: 131.9 - 132.1 mm
Caution
No more than 0.2 mm of stock may be removed from
the cylinder head and cylinder block mating surfaces
in total.
uneven or incomplete, reface the valve seat.
Standard value:
Intake 1.0 mm
:
Exhaust: 1.5 mm
Limit:
Intake: 0.5 mm
Exhaust: 1.0 mm
PWEE9520
PWEE9520-A Revised