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Page Title:
Table 1-2. Engine Limits and Clearances |
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 Table 1-1. Torque Values-Continued
Screw
Coml low-carb
grade
SAE-2
SAE-5
SAE-7
SAE-8
Head
Marking
None
ft.-lb.
ft.-lb.
ft.-lb.
ft.-lb.
5/8-11
80
140
170
200
5/8-18
90
155
200
230
3/4-10
125
240
300
350
3/4-16
140
275
350
400
7/8-9
175
375
500
575
7/8-14
200
400
550
625
1-8
250
575
750
850
1-12
275
650
825
950
Table 1-2. Engine Limits and Clearances
Point of measurement
Manufacturer' specifications
s
Wear limits
Minimum Inches
Maximum Inches
Inches
Valve Guide
Bore diameter, exhaust
0.3452
0.3460
0.3475
Bore diameter, intake
0.3432
0.0.3440
0.3455
Top of guide to cylinder block
1-15/32
1-15-32
Valve Seat Angle
Intake
30 deg.
30 deg.
Exhaust
45 deg.
45 deg.
Valve
Face angle intake
30 deg.
30 deg.
Face angle exhaust
45 deg.
45 deg.
Stem diameter, exhaust
0.3405
0.3415
0.3385
Stem diameter, intake
0.3405
0.3415
0.3385
Valve Springs
Note: Effort in pounds required to compress spring length specified.
Valve closed, length 1-45/64
47 pounds
53 pounds
42 pounds
Valve open, length 1-27-6/
96 pounds
104 pounds
91 pounds
Camshaft
Journal diameter
Front
1.8715
1.8725
1.8745
Intermediate
1.7457
1.7465
1.7485
Rear
1.2465
1.2475
1.2495
Bushing Inside Diameter
Front
1.8745
1.8755
0.004
Intermediate
1.7495
1.7502
0.004
Rear
1.2495
1.2505
0.004
Journal to Bushing
Clearance
Front, rear
0.002
0.004
0.006
Intermediate
0.003
0.0045
0.0065
End Play
0.003
0.007
0.009
Connecting Rod
Bearing insert thickness
0.0625
0.0628
0.0618
Crank pin diameter
2.0600
2.0607
2.0590
Crank pin clearance
0.0002
0.0020
0.0030
Side play
0.006
0.010
0.0030
Crankshaft journal fillet radii
5/64
7/64
Main Bearings
Insert thickness
0.0950
0.0953
0.0943
Crankshaft journal diameter
2.2448
2.2457
2.2438
Journal Radii
All except rear
5/64
7/64
Rear (flywheel end)
7/64
9/64
1-2
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