Mitsubishi 3000GT 1991, Service Manual

Page: 55 / 1146

ENGINE Specifications
Items
Standard value
Limit
Cylinder head
Overall height mm (in.)
132 (5.20)
-0.2
Flatness of gasket surface
mm (in.) Max. 0.03
0.2
Oversize rework dimension of valve
seat hole
mm (in.)
Intake 0.3 O.S.
36.300 36.325 (1.4291 1.4301)
0.6 O.S.
36.625 1.4419)
Exhaust 0.3 O.S.
33.325 (1.31 1.3120)
0.6
33.625 (1.3228 1.3238)
Oversize rework dimension of valve
seat hole depth
mm (in.)
Intake 0.3 O.S.
7.5 7.7 ,303)
0.6 O.S.
7.8 8.0
Exhaust 0.3 O.S.
7.9-8.1 ,319)
0.6 O.S. 8.2 8.4
Oversize rework of valve guide hole
(both intake and exhaust)
mm (in.)
0.05
0.25 O.S.
13.268
0.50 13.500
Cam height mm (in.)
Intake
35.49 34.99 (1.3776)
Exhaust 35.20 (1.3858)
34.70 (1.3661)
Journal O.D. mm (in.) 26 (1.02)
Bearing oil clearance mm (in.)
0.05 0.09
Valve length mm (in.)
Intake
106.3 (4.185)
Exhaust 105.4 (4.150)
Stem O.D. mm (in.)
Intake
6.6
Exhaust 6.6
Face angle 45 45.5”
valve head (Margin)
Intake 1 0.5
Exhaust
1.5 1
Clearance (Valve stem to guide)
mm (in.)
Intake
0.02 0.05 0.10
Exhaust 0.05 0.09 0.12
Limit must be -0.2 mm in.) combined with amount of grinding of cylinder block gasket surface.
TSB Revision