1930 Cadillac Brochure Front Cover - GM Heritage Center

Cadillac cylinders are finished by a honing
process gining a smooth, glass-like finish to
this important unit
The circulation of
water through the radiator
and cylinder jackets
is effected by a centrifugal
pump, mounted on
the right side of the engine
driven by a silent
chain from the crankshaft.
The purnp is
coupled to the driven
sprocket by a flexible
coupling of laminated
spring steel, permitting the pump shaft to align itself, protecting
the packing from wear. The radiator is of the cellular type, giving
a large area for the dissipation of heat to maintain the temperature
at the most effective point. It is fitted with vertical balanced
shutters controlled by a thermostat mounted on the upper radiator
lank. When the engine is cold, the shutters are automatically closed,
preventing the passage of air through the radiator. When the
temperature of the water reaches a predetermined point, the thermostat
opens the shutters to such an extent as to maintain the
most desirable temperature for efficient engine operation. The
shutters not only control the temperature of the water, but also the
temperature of the air under the hood, thereby assisting carburetion,
and in conjunction with the thermostatically controlled carburetor
reducing the "warming-up" period.
A temperature indicator is provided on the instrument board to
indicate the exact temperature of the motor at all times. Air circula-
lion through the radiator is provided by a 6-blade fan driven by a
V-belt from the crankshaft. This fan is mounted in Durcx bushings
automatically lubricated by a lead from the oil pressure regulator.
The oil is drained from the fan bearings through the mounting
bracket back to the crankcase where it is returned to the circulatory
system.
L UBRICA TION S YSTEM
Lubrication, which is one of the most essential elements to continued
satisfactory operation, is provided in the Cadillac power
plant by a full pressure
system. Pressure is furnished
by a gear pump
driven from an extension
of the distributor shaft.
This pump is attached to
a cap on the front main
bearing which it supplies
through a direct passage.
The oil supply is maintained
in a pressed steel
reservoir of 8 quarts capacity
which closes the
under side of the crankcase.
The entire area of
the reservoir is covered
by a fine mesh screen,
giving abundant area for
Durex bushings supporting the fun receive
direct pressure lubrication from the engine
lubricating system, assuring long life for
this important unit.
-32