Mitsubishi 4G1 Service Manual page 200

1 IC-76
Guide O.D.
INSPECTION
CYLINDER HEAD
(1) Check the cylinder head gasket surface for flatness by
using a straightedge in the directions of A through
in the illustration.
Standard value: 0.05 mm (JO20 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.)
Caution
Cylinder head height (Specification when new):
VALVE
using a valve refacer. The valve seat contact should be
maintained uniform at the center of the valve face.
(2) If the margin exceeds the service limit, replace the valve.
Standard value:
Limit:
VALVE SPRING
the limit, replace.
Identification color: White
Free
height
(2) Measure the squareness of the spring and, if the limit is
exceeded, replace.
Standard value: 2" or less
1 EN0264
Limit: Max. 4"
VALVE GUIDE
(1) Measure the clearance between the valve guide and valve
stem. If the limit is exceeded, replace the valve guide or
valve, or both.
Standard value:
Limit:
1 EN0279
cylinder block.
89.9 - 90.1 mm (3.539 - 3.547 in.)
1.2 mm LO47 in.)
Intake
Exhaust 2.0 mm (079 in.)
Intake 0.7 mm (.028 in.)
Exhaust 1.5 mm (059 in.)
Standard value: 49.8 mm (1.961
Limit: 48.8 mm
(1.922
Intake 0.02 - 0.06 mm (0008 - .0024 in.)
Exhaust 0.05 - 0.09 mm (0020 - .0035 in.)
Intake 0.10 mm (.004 in.)
Exhaust 0.15 mm (006 in.)
if it is smaller than
in.)
in.)
shown