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CYLINDER HEAD—High turbulence type for better fuel combustion.
CRANKSHAFT—Drop-forged, fully compensated and equipped with rubber-insulated
damper, balanced at rest and in motion; five long-wearing, bronze-backed main bearings.
PISTONS—T-slot, cam ground, aluminum alloy, fitted with four pinned, plated piston
rings.
CONNECTING RODS—Drop-forged, high manganese alloy for greater strength, dow-
el-fitted caps assure perfect alignment. Bearings with centrifugally installed babbitt metal.
CAMSHAFT—Nickel-chrome-molybdenum-iron alloy, heat treated for maximum hard-
ness, specially treated for smooth finish. Large babbitt bearings.
TAPPETS—Exclusive roller cam design. Rotating cam lobe maintains constant contact,
requires less adjustment, wears longer.
VALVES—Special alloy steel. Exhaust valves have high chrome content to resist high
temperatures.
CYLINDER BLOCK—Super-hard chrome alloy. Provides wear resisting cylinder
bores, eliminates need for special valve seat inserts. Entire block is as hard as ordinary
valve seat inserts.
CARBURETION—Down-draft type. Dual flow to combustion chambers for more com-
plete combustion. Radial intake manifold provides direct, free flow passages for fuel mix-
ture. Automatic choke. Climatic control. Anti-percolator valve. Air cleaner.
LUBRICATION—Exclusive Duo-Flo supplies oil in direct ratio to engine speed. Lubri-
cates every part at first turn of crankshaft. Float type oil intake draws clean oil from point
just below surface of oil in pan.
Correct valve tappet adjustment is vital to good engine operation and it is important,
therefore, that the specified clearance between the adjusting screws and valve stems be
maintained at all times. These are as follows:
Intake Valves
Exhaust Valves
Tappets checked and adjusted only after the engine has been run long enough to attain
normal operating temperature. Be sure to use an accurate feeler gauge.
The valve locations, counting from the front of the engine, are as follows:
Intake Valves
Exhaust Valves
VALVE TAPPET ADJUSTMENT
Six Cylinder Engine
.008"
.010"
Six Cylinder Engine
2-4-5-8-9-11
l-3-6-7-10-12
HUDSON OWNER MANUAL
Eight Cylinder Engine
.006"
.008"
Eight Cylinder Engine
2-3-6-7-10-11-14-15
l-4-5-8-9-12-13-16
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