Mitsubishi Galant

1. Before definitively to affirm as opinion on a thermostat exit out of operation, check up level of a cooling liquid in system, a condition and effort of a tension приводного a belt (see the Head of Adjustment and routine maintenance), and also serviceability of functioning of a measuring instrument / a control lamp of temperature.
2. One of the possible reasons of too slow warming up of the engine (according to measuring instrument indications) is thermostat jamming in open position. Replace the thermostat new.
3. In case of an engine overheat touch a hand the bottom hose of a radiator. If the hose not нагрет, probably, the thermostat is jammed in the closed position, blocking circulation of a cooling liquid through a radiator. Replace the thermostat.

At all do not maintain the car with the removed thermostat, - the feedback of the onboard processor that will lead to increase of toxicity of the fulfilled gases and excessive increase in the expense of fuel thus can be broken off.

4. If the bottom hose нагрет, means it, that the cooling liquid regularly circulates through a radiator, i.e. the thermostat is opened. Address to materials of the Section devoted to diagnostics of malfunctions of system of cooling.
5. The most exact results are given by thermostat check on a workbench.
6. Remove the thermostat from the engine (the Engine see the Head).
7. Tie up to assemblage of the thermostat a piece of a wire and lower it in the capacity filled with water. There lower the thermometer.

Track, that the thermometer and the thermostat did not adjoin to walls and a capacity bottom.

8. Start to warm up slowly water, watching change of indications of the thermometer, - operation of the valve of the thermostat should occur in exact conformity to requirements of Specifications.
9. Estimate size of full opening of the valve, - the rating value makes 8 mm.
10. The description of procedures of removal and thermostat installation is resulted in Section Removal and thermostat installation.