Mitsubishi 3000GT 1991, Service Manual

Page: 56 / 1146

ENGINE
Specifications
Items
Valve guide
Length mm (in.)
Intake
Exhaust
Service size mm (in.)
Standard value
45.5 (1.791)
50.5 (1.988)
0.05
0.25
0.50 Oversize
Limit
Valve seat
Width of seat contact
mm (in.) 0.9 1.3
Seat angle
44 44.5”
Valve spring
Free length mm (in.) 46.9 (1.846)
45.9 (1.807)
Load N
280 (62) at installed height
Installed height mm (in.) 37.9 (1.492)
38.9 (1.531)
Squareness Less than 2”
4”
Cylinder block
Cylinder bore mm (in.) 91 (3.5866)
Out-of-roundness and taper of cylinder
Less than 0.02
bore mm (in.)
Flatness of gasket surface
mm (in.)
Less than 0.05
0.10
Piston
mm (in.)
91 (3.5866)
Clearance (Piston to cylinder)
mm (in.) 0.03 0.05
Ring groove width mm (in.)
No.
1.2
No. 2
1.5
Oil
3.0 18)
Service size mm (in.) 0.25
0.75 1
Oversize
Piston ring
Side clearance
mm (in.)
No. 1
No. 2
End gap
mm (in.)
No.
No. 2
Oil ring side rail
mm (in.)
Service size mm (in.)
0.03 0.07
0.02 0.06
0.30 0.45
0.45 0.60
0.20 0.60
0.25 0.50
0.75
Oversize
0.1
0.1
0.8
0.8
1
Connecting rod
Bend m m ( i n . )
Twist mm (in.)
Big end to thrust clearance
mm (in.)
Piston pin press-in load N
0.05 or less
0.1 (0.004) or less
0.10 0.25
7,500 17,500 (1,686 3,934)
0.4
TSB Revision