Subaru Forester

1997-2005 of release

Repair and car operation

Subaru Forester
+ Cars Subaru Forester
+ The maintenance instruction
+ Routine maintenance
+ The engine
- Systems of cooling, heating
   Antifreeze - the general data
   Check of serviceability of functioning and thermostat replacement
   Removal and installation of the fan of system of cooling
   Service, removal and installation of a radiator of system of cooling
   Removal and installation of a filling tank (model with a turbo-supercharging)
   Removal, check and installation of the water pump
   System of heating and salon ventilation - the general information
   Removal and heater installation
   Removal and installation of the fan of a heater
   Check of serviceability of functioning and service of systems of heating and air conditioning
+ The power supply system and release
+ Engine electric equipment
+ Control systems of the engine
+ Gear change box
+ Coupling, трансмиссионная a line
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

Признаки различных инфекций

Check of serviceability of functioning and thermostat replacement

Do not open a cover of a radiator and do not remove the thermostat before full cooling of the engine! The prevention in the beginning see also Has undressed Antifreeze - the general data).



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 drive a belt (Routine maintenance see the Head) 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 and blocks 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, it means 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 (Introduction in the beginning of the present Management see).
5. The most exact results are given by thermostat check on a workbench.
6. Remove the thermostat from the engine (see more low).
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.


Thermostat design

1  — the  Working valve
2  — the  Spring
3  — the  Emphasis
4  — the  Piston
5  —  Directing
6  — the  Rubber holder
7  — the  Lock ring
8  — the  Thermosensitive element
9  — the  prorolling Valve


1. Disconnect a negative wire from the battery.

If the stereosystem established on the car is equipped by a security code before to disconnect the battery make sure that have a correct combination for audiosystem input in action!

2. Merge cooling liquid (Routine maintenance see the Head).
3. At a corresponding complete set disconnect from a thermostat casing vacuum hoses.
4. Uncover a thermostat casing.
5. Take the thermostat from a casing, - try to remember its adjusting position. Carefully smooth out sealing surfaces of a cover and a casing of the thermostat a scraper, then wipe their rags moistened in solvent.
6. Establish the thermostat on the regular place the prorolling valve forward and upwards.
7. Tighten all fixture with demanded effort. Operating as it should be the return to a dismantle order, establish into place all acting in film components.
8. Fill cooling system (Routine maintenance see the Head). Start the engine and check up it on presence of leaks and serviceability of functioning of the thermostat.