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Manual
F 240
Ver. 01
COOLING WATER SYSTEM
7E
COOLING WATER THERMOSTATS
Before starting work, consult:
-- chapter 2, "BACKGROUND INFORMATION".
The thermostatic three--way valve is equipped with three elements. In cold condition, the
thermostatic elements are closed and no water can flow through the heat exchanger.
When the temperature of the water rises, the wax elements expand, and causes the
elements to open against spring pressure, so that the passage to the heat exchanger is
released.
If the water becomes excessively hot or remains too cold, the three thermostatic
elements must be examined.
Inspection of the thermostatic elements:
1. Drain the cooling water by removing the drain plug from the thermostat housing
(proceed carefully when the engine is still hot).
2. Remove the thermostat cover
3. Place the elements in a basin filled with water. Heat the water and with the aid of a
calibrated thermometer check whether the element opens at the correct tempera-
ture. If the element does not open at the correct temperature, it must be renewed.
4. Refit all parts in the reversed order.
Drain plug
Cover
Thermostatic 3--way valve
--o--o--o--o--o--
7 - - 8
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