1991 MITSUBISHI 3000GT width

GENERAL - General Data and Specifications
GENERAL DATA AND SPECIFICATIONS
00-21
MOOHA- -
c-i----J---i!--8GENERALSPECIFICATIONS
Vehicle dimensionsmm (in.)
Overall length
1
Overall width2
Overall height3
Wheelbase4
Tread
Front5
Rear6
OverhangFront7
Rear8
Minimum running groundclearance9
Angle of approachdegrees10
Angle of departuredegrees11
Vehicle weightkg (tbs.)
Curb weights
MIT
AI-T
Gross vehicle weight rating
Gross axle weight rating
Front
Rear
Seating capacity
Engine
Model No.
Piston displacementcm” (cu.in.)
3000GT
(Non-Turbo)
4,545(178.9)
1,840(72.4)
1,285(50.6)
2,470(97.2)
1,560(61.4)
1,580(62.2)
1,025(40.4)
1,050(41.3)
145(5.7)
12.2”
16.9”
1,455 (3,208)
1,495 (3,296)
1,925 (4,244)
1,100 (2,425)
850 (1.874)
4
6G72-(DOHC)
2,972 (181.4)3000GT SL
(Non-Turbo)
4,545(178.9)
1,840(72.4)
1,285
(50.6)
2,470(97.2)
1,560(61.4)
1,580(62.2)
1,025(40.4)
1,050(41.3)
145(5.7)
12.2”
16.9”
1,520 (3,351)
1,560 (3,439)
1,925 (4.244)
1,100 (2,425)
850 (1,874)
4
6G72-(DOHC) -
2,972 (181.4)
+64
OOFO015
3000GT VR-4
(Turbo)
4,545(I 78.9)
1,840
(72.4)
1,285(50.6)
2,470(97.2)
1,560(61.4)
1,580(62.2)
1,025(40.4)
1,050(41.3)
145 (5.7)
12.2”
16.9”
1,710 (3.770)1,720 (3,792)“’
-
2,050 (4.519)
1,110 (2,447)940
(2,072)
4
6G72-(DOHC)
2,972 (181.4)
NOTE“I : <4ws>
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11-6ENGINE - Specifications
Items
Valve guide
Lengthmm (in.)
Intake
Exhaust
Service sizemm (in.)Standard value
45.5 (1.791)
50.5 (1.988)
0.05 f.002). 0.25 (.OlO),0.50 f.020) OversizeLimit
Valve seat
Width of seat contactmm (in.)0.9 - 1.3 (.035 - ,051)
Seat angle44 - 44.5”
Valve spring
Free lengthmm (in.)46.9 (1.846)45.9 (1.807)
LoadN (Ibs.)280 (62) at installed height
Installed heightmm (in.)37.9 (1.492)38.9 (1.531)
Squareness1
Less than 2”4”
Cylinder block
Cylinder boremm (in.)
91 .I0
(3.5866)
Out-of-roundness and taper of cylinderLess than 0.02 i.0008)
boremm (in.)
Flatness of gasket surfacemm (in.)
Less than 0.05 t.0020)0.10 (.0039)
Piston0.D mm (in.)
91 .I0 (3.5866)
Clearance (Piston to cylinder)mm (in.)
0.03 - 0.05 (.0012 - .0020)
Ring groove widthmm (in.)
No. 11.2 (.047)
No. 21.5 f.059)
Oil
3.0 (.I 18)
Service sizemm (in.)
0.25 LO1 0),0.50 (.020),0.75 (.030), 1 .oo l.039)Oversize
Piston ring
Side clearancemm (in.)
No. 1
No. 2
End gap
mm (in.)
No. 1
No. 2
Oil ring side railmm (in.)
Service sizemm (in.)
0.03 - 0.07 (.0012 - .0028)
0.02 - 0.06 l.0008 - .0024)
0.30 - 0.45 (.0118 - .0177)
0.45 - 0.60 (.0177 - .0236)
0.20 - 0.60 (.0079 - .0236)
0.25 (.OlO), 0.50 (.020),0.75 (.030), 1 .oo (.039)Oversize
0.1 (.004)
0.1 (.004)
0.8 i.031)
0.8 l.031)
1 .o (.039)
Connecting rod
Bendmm (in.)
Twist
mm (in.)
Big end to thrust clearancemm (in.)
Piston pin press-in load
N (Ibs.)
0.05 i.0020) or less
0.1 (0.004) or less
0.10 - 0.25 (.0039 - .0098)
7,500 - 17,500 (1,686 - 3,934)
0.4 l.016)
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11-36ENGINE - Cylinder Head and Valve
SquarenssVALVE SPRINGS
(1) Check free length of each valve spring and replace if
necessary.
!
FreelengthStandard value: 46.9 mm
(1.846 in.)\bJLimit: 45.9 mm
(1.807 in.)
(2) Using a square, test squareness of each valve spring. If
spring is excessively out of square, replace it.
Standard value: Less than 2”
Limit: 4
1 EN035
VALVE GUIDES
1 EN29ECheck the valve stem-to-guide clearance. If the clearance
exceeds the service limit, replace the valve guide with new
oversize part.
Standard value:
Intake
Exhaust0.02 - 0.05 mm (0008 - .0020 in.)
Limit:0.05
- 0.09 mm (.0020 - .0035 in.)
Intake
Exhaust0.10 mm (0039 in.)
0.12 mm (0047
in.)6EN043
1AVALVE SEAT RECONDITIONING PROCEDURES
(I 1 Before valve seat reconditioning, check valve stem to guide
clearance.
(2)Recondition the valve seat with a seat grinder or cutter. The
valve seat width should be the specified value at the center
of the valve face.
Inspect the valve seat with prussian blue to determine
LJwhere the valve contacts the seat. To do this, coat valve
seat lightly with prussian blue, and then set valve in place.
Rotate the valve with light pressure. If the blue is
transferred to the center of valve face, contact is satisfac-
tory.
If the blue is transferred to top edge of the valve face, lower
valve seat with a 30 degrees stone or cutter. If the blue is
transferred to the bottom edge of valve face, raise valve
seat with a 65 degrees stone or cutter.
Valve seat diameter:
Intake34 mm (I .34 in.)
ExhaustSeat width: 0.9
29.5 mm (1.16 in.)
- 1.3 mm (035 - .051 in.)
(3) The valve and valve seat should be lapped with a lapping
compound.
VALVE SEAT REPLACEMENT PROCEDURE
(1) Grind the valve seat to be replaced from the inside to thin
the wall thickness. Then, remove the valve seat.
1 ENOE18
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ENGINE - Cylinder Head and Valve
Oversize I.D.
Valve(2) Rebore the valve seat hole in
oversize valve seat diameter.Seat Insert Oversizescylinderhead to a selected
DescriptionSize mm (in.)1 Size mark /Seat insEt(,ke;ght H/Cylinder head I.D.
mm (in.)
Intake valve0.3i.012)0,s.
I
30
I
7.5-7.7(.295-,303)36.300-36.325(1.4291-1.4301)
seat insert
0.6(.024)O.S.607.8-8.0(.307-,315)36.600-36.625(1.4409-1.4419)
Exhaust valve
seat insert
0.3l.012)0,s.7.9-8.1(.311-.319)33.300-33.325(1.3110-1.3120)
0.6(.024)O.S.8.2-8.4t.323-,331)33.600-33.625(1.3228-1.3238)
7EN02E(3) When press-fitting the valve seat, chill the valve seat with
liquid nitrogen so that the cylinder head bore is not
damaged by galling.
(4)Using the valve seat grinder or cutter, correct the valve seat
to the specified width and angle.
(5) See “VALVE SEAT RECONDITIONING PROCEDURES.”
VALVE GUIDE REPLACEMENT PROCEDURE
MllPJDB
(1) Using suitable rod and a press, press the valve guide out of
the cylinder head toward the cylinder block side.
(2) Rebore the valve guide hole to the oversize valve guide
outside diameter
to be press-fitted.
CautionDo not use a valve guide of the same size as the one
removed.12.250-12.268
(.4823-.4830)12.500-12.518
(.4921-.4928)(3) Install the valve guide until a protrusion of 17.5 mm
(.689in.) is obtained. See the illustration.
NOTE1. Press-fit the valve guide from the cylinder head top
surface.
2. Note the difference in lengths of the valve guides for
the intake and exhaust: intake 45.5 mm (1.791 in.) and
exhaust 50.5 mm (1.988 in.).
3. After the valve guide has been installed in position,
insert a new valve to ensure that it slides smoothly.
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ENGINE - Crankshaft. Flvwheel and Drive Plate11-51
id
PLASTIGAGE METHODMllUlAA
Plastigage may be used to measure the clearance.
(1) Remove oil and grease and any other dirt from bearings and
journals.(2) Cut plastigage to the same length as the width of the
bearing and place it in parallel with the journal, off oil holes.
(3) Install the crankshaft, bearings and caps and tighten them
to the specified torques. During this operation, do NOT turn
the crankshaft. Remove the caps. Measure the width-of the
plastigage at the widest part by using a scale printed on the
plastigage sleeve.
If the clearance exceeds the repair limit, the bearing should
be replaced.
Should the standard clearance not be obtained even after
bearing replacement, replace the crankshaft.
SERVICE POINTS OF INSTALLATIONMllUDAM
16. INSTALLATION OF CRANKSHAFT BEARING (UPPER) /
15.10. THRUST BEARING A / 14.11. THRUST BEARING
B
/ 12. CRANKSHAFT BEARING (LOWER)
(1) Classify the crankshaft bearings (upper and lower) by
whether there is an oil groove or not. Then, assemble asshown in the illustration.
(2) Assemble the thrust bearings (A and
B) on the No.3
journal area as shown in the illustration.
CautionInstall them with the groove side facing outward.Crankshaft bearing (upper)
Oil groove
Thrust bearing A
Front of engine(Tlmlng belt side)
EN269
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37A-30STEERING - Power Steering Oil Pump
13R0433
Connector
13K752
Terminal assembly
Side plate613N0059
Suction connector
mounting portion
of oil pump body
13K75313NOOSi
13FOO50
INSPECTIONM37RGAM
l Check the flow control spring for wear.
lCheck the shaft of the pulley for play and round movement.
l Check the groove of rotor vane for “stepped” wear.
l Check the contact surface of cam ring and vanes for
“stepped” wear.
l Check the vanes for breakage.
CHECK OF GAP BETWEEN VANE AND ROTOR GROOVEInstall vane to rotor groove as illustrated. Measure the gap
between vane and rotor groove with thickness gauge.
Limit: 0.06 mm
(.0024 in.)
M37RHBISERVICE POINTS OF REASSEMBLY25. 21.
13.9.7.INSTALLATION OF O-RINGSApply specified fluid on O-rings to install.
No.I.D. x Width
111 x1.9 (.433 x ,075)
213x1.9(.512 x ,075)
317.8 x 2.4
(.701 x ,094)
413.5x1.5
(.531 x .059)
53.8 x 1.9 (. 150 x ,075)
616.8 x 2.4
i.661 x ,094)
mm (in.)
I1
I
I
I
I
t i
14. INSTALLATION OF SPRINGFit the spring to the oil pump body with the larger-diameter
end at the terminal assembly side.
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