1.3.10 Cooling system
(1) Coolant pump
(2) Thermostats
(3) By-pass pipe
(4) Radiator
(5) Expansion tank
(6) Oil cooler
The coolant pump is attached to the front face of
the cylinder block and the thermostat housing is
mounted above it.
The system has the internal liquid circulation via
the by-pass pipe. The circulation is regulated by
the 2- way thermostat. This arrangement ensures
a steady warming-up of the engine under all
conditions.
NOTE: Never use only water as coolant but a
mixture of 40 - 60 % of water and antifreeze. See
the information for coolant quality requirements.
Fig. 12 Cooling system
Fig. 13 Cooling system
1.3.10.1 Thermostat
33 - 49 engines
The engine has a 2-way thermostat. Its opening
temperature is 83°C. There is no separate winter
thermostat.
Fig. 14
1. Introduction
1-18 4th Generation Engines
8370 79492
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