PREVOST LE MIRAGE XLII BUS SHELLS User Manual

Section 05: COOLING SYSTEM
PA1553
3
1. DESCRIPTION
A radiator and thermo-modulated fan are used to effectively dissipate the heat generated by the engine.
A centrifugal-type water pump is used to circulate the engine coolant (Fig. 1).
Two full blocking-type thermostats are used in the water outlet passage to control the flow of coolant,
providing fast engine warm-up and regulating coolant temperature.
The engine coolant is drawn from the lower portion of the radiator by the water pump and is forced
through the transmission cooler before going through the oil cooler and into the cylinder block.
FIGURE 1: COOLING SYSTEM 05087
From the cylinder block, the coolant passes up
through the cylinder head and, when the engine
is at normal operating temperature, it goes
through the thermostat housing and into the
upper portion of the radiator. The coolant then
passes through a series of tubes where its heat
is dissipated by air streams created by the
revolving fan and the motion of the vehicle.
Upon starting a cold engine or when the coolant
is below normal operating temperature, the
closed thermostats direct coolant flow from the
thermostat housing through the by-pass tube to
the water pump. Coolant is recirculated through
the engine to aid engine warm up. When the
thermostat opening temperature is reached,
coolant flow is divided between the radiator inlet
and the by-pass tube. When the thermostats are
completely open, all of the coolant flow is to the
radiator inlet.

PREVOST LE MIRAGE XLII BUS SHELLS Specifications

General

Brand	PREVOST
Model	LE MIRAGE XLII BUS SHELLS
Category	Buses
Language	English