Willys Ford GPW - Torque Wrench Readings; Valves and Valve Springs

23-24
ORDNANCE MAINTENANCE - ENGINE AND ENGINE ACCESSORIES FOR ‘/4-TON
4x4 TRUCK (WILLYS~OVERLAND MODEL MB AND FORD MODEL GPW)
CONNECTING ROD AND PISTON ASSEMBLY
Manufacturers
Fit tolerance
fit Location
Connecting rod side clear-
ance
Connecting rod clearance
on crankshaft
Piston pin clearance in
connecting rod.
Piston pin clearance in
piston
Piston and cylinder at skirt
0.005 in. to 0.009 in.
Fit Wear
0.013 in.
0.0005 in. to 0.001 in.
0.001 in.
Locked in connecting
rod
0.0001 in. to 0.0005 in. 0.0015 in.
5-pound to lo-pound
pull with 0.003-in.
feeler
5-pound to
lo-pound pull
with O.OlO-in.
feeler
Piston top land and cylin-
der
Piston ring to groove clear-
ance (all rings)
Piston ring gap (all rings)
0.0205 in. to 0.0225 in.
0.0005 in. to 0.0015 in.
0.008 in. to 0.013 in.
0.003 in.
0.013 in.
VALVES AND VALVE SPRINGS
Intake valve stem diameter
0.373 in.
Valve seat angle 45 degree
Exhaust valve stem diam-
0.3725 in.
eter
Valve seat angle 45 degree
Spring tension at 2 7/64
50 pounds
inches (all springs)
Spring tension at 13/4
116 pounds
inches (all springs)
OIL PUMP
Clearance between pinion 0.001 in. to 0.003 in.
shaft and pinion gear
Clearance between oil
0.002 in. to 0.004 in.
pump housing and oil
pump shaft
Oil pump relief plunger 5% pounds
spring tension at 1 l/16
in.
CRANKSHAFT
Crankshaft end play
0.004 in. to 0.006 in.
Main bearing clearance (all
0.0005 in. to 0.001 in.
main bearings)
24.
_. _.
0.368 in.
0.3685 in.
0.003 in.
0.005 in.
0.006 in.
0.001 in.
Type of
Fit
Running
Slip
Running
Running
Running
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