Mitsubishi 4G1 Service Manual page 265

ENGINE
REMOVAL SERVICE POINTS
RETAINER LOCK REMOVAL
(1) Store the removed valves, springs and other parts, tagged
to indicate their cylinder No. and location to aid reassembly.
VALVE STEM SEAL REMOVAL
(1) Do not reuse removed valve stem seals.
INSPECTION
CYLINDER HEAD
(1) Check the cylinder head gasket surface for flatness by
using a straightedge and thickness gauge.
Standard value: 0.03 mm (.0012 in.)
Limit: 0.2 mm (.008 in.)
(2) If the service limit is exceeded,' correct to meet the
specification.
Grinding limit: *0.2 mm (008 in.)
block
Cylinder head height (Specification when new):
119.9 - 120.1 mm (4.720 - 4.728 in.)
VALVE
(1) Check the valve face for correct contact. If incorrect, reface
using a valve refacer. Valve should make a uniform contact
with the seat at the center of valve face.
(2) If the margin is smaller than the service limit, replace the
valve.
Standard value:
Intake
Exhaust
Limit:
Intake
Exhaust
TSB Revision
1.0 mm (039 in.)
1.3 mm (.051 in.)
0.5 mm (020 in.)
0.8 mm (031 in.)