SUBSECTION 11F
COOLING SYSTEM
bocharger. The coolant flows through a
GENERAL
water jacket, within the turbocharger,
The cooling system includes the r a d i a t o r ,
which is adjacent to the turbine end, re-
fan, water pump and thermostat.
tarding the flow of heat at this point.
The coolant discharges at the cooling wa-
ter outlet, located near the top of the
RADIATOR AND COOLING FAN
turbocharger and returns to the engine.
The engine coolant is circulated through
the radiator (Figure 11F-1 on page
ENGINE COOLING SYSTEM MAINTE-
11F-2) where the heat is absorbed in the
NANCE
air stream developed by a suction fan
which is belt driven from the crankshaft.
The water pump draws the coolant
General
through the oil cooler and discharges it
into the lower parts of the cylinder
A properly maintained and clean cooling
block. Openings in the water jacket
system will reduce engine wear and in-
around the cylinder bores connect with
crease the satisfactory engine operating
corresponding openings in the cylinder
time between engine overhauls. This is
head through which the liquid rises to
accomplished by the elimination of hot
circulate around the valves and fuel in-
spots within the engine. Thus, when
jectors. Then the coolant passes
operating within the proper engine tem-
through a water manifold, bolted to the
perature range and when not exceeding
cylinder head, past the thermostat and
the recommended horsepower output of
into the radiator.
the unit, all engine parts will be within
the operating temperature ranges and at
Upon starting a cold engine or when the
their proper operating clearances.
coolant is below operating temperature
(thermostat closed) the coolant is
by-passed from the water manifold di-
E n g i n e Coolant
rectly to the pump, thus providing water
circulation within the engine during the
The function of the engine coolant is to
warm-up period.
absorb the heat, developed as a result of
the combustion process in the cylinders,
from components parts such as exhaust
COOLING SYSTEM OF TURBOCHARGER
valves, cylinder liners and pistons which
UNITS
are surrounded by water jackets. In
addition, the heat absorbed by the oil is
The cooling system has been altered to
a l s o removed by the engine coolant in the
oil-to-water oil cooler.
provide adequate cooling for both the
turbocharger and the engine.
The turbocharger is cooled by the addi-
C o o l i n g System Capacity
tion of a line leading from the water gal-
lery within the cylinder block, near the
The capacity of the basic cooling system
rear of the blower, to the cooling water
(cylinder block, head, thermostat hous-
inlet, located near the bottom of the tur-
Subsection 11F
