threads. If a torque wrench is not available, estimate
the degree of tightness necessary for the
stud,
nut or
0ther 5/16
" Cylinder Block
screw being installed and tighten accordingly. Do not
DIMENSIONS AND
CLEARANCES
All dimensions and clearances given at room temperature of 70°F.
All values in inches unless otherwise specified.
Minimum Maximum ,
CAMSHAFT AND CRANKSHAFT
Crankshaft Main Bearing Journal to Bearing Clearance 0.0025 0.0038
1
* Crankshaft End Play 0.006 0.012
Camshaft Bearing to Camshaft 0.0015 0.0030
Camshaft End Play 0.003
* Crankshaft Rod Journal to Rod Bearing 0.0020 0.0033
Connecting Rod End Play 0.002 0.016 '
Timing Gear Backlash 0.002 0.003 '
Oil Pump Gear Backlash 0.002 0.005
PISTON AND CYLINDER
Piston Pin in Piston 0.0002 0.0004
Piston Pin in Rod 0.0002 0.0007
* Piston Ring Gap in Cylinder r 0.010 0.020
Piston Clearance in Cylinder - Measured .10 Below Oil
Control Ring, 90° from Pin 0.001 0.003 -
Cylinder Bore - Standard Size 3.1245 3.1255 '
Crankshaft Main Bearing Journal - Standard Size
1.9992
2.0000
Crankshaft Rod Bearing Journal - Standard Size
1.6252
1.6260
TAPPETS AND VALVES
* Valve Seat Width 1/32 1/8
* Valve Face Angle 44°
* Valve Seat Angle 45°
Valve Stem to Guide - Intake 0.0010 0.0025
Valve Stem to Guide - Exhaust 0.0035 0.0040
Tappet to Cylinder Block Clearance 0.0015 0.0030
Tappet Adjustment (Cold)
* Intake 0.007 0.009
* Exhaust 0.012 0.014
* - Frequently used overhaul values.
ASSEMBLY
TORQUES
BOLT TORQUE FT. - LB.
Gearcase Cover 8-10
AOOCMDI
v -rrmoiicc Cylinder Head Stud Nuts (Cold) 14-16
ASSEMBLY TORQUES
Rear Bearing p|ate Screws 25
_
27
Assembly torques as given here require the use of a
Starter Mountin
g
Bo
|
ts 18
.
2Q
torque wrench. These assembly torques assure Connectina Rod Bolt 14-16
proper tightness without danger of stripping the connecting Hod Bolt 14 16
Flywheel Cap Screw 35-40
Stud and Nuts 8-10
strip the threads. Check all studs, nuts and screws Oil Base 18-23
often.
Tighten as needed to prevent them from Manifold Mounting Stud Nuts 6-9
working loose. Oil Pump 7-9
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