Thermostat — Removal, Checking and Installation (Escort 4)

Thermostat

OHV Engine Thermostat

The cooling system thermostat accelerates engine warm-up and maintains the required thermal conditions. The thermostat, depending on the coolant temperature, automatically turns on or off the cooling system radiator, passing the liquid through the radiator or bypassing it.

If the thermostat fails, the engine either does not warm up completely or overheats, but the radiator remains cold.

Removal

1. Disconnect the ground wire and drain the coolant.

2. Remove the cooling and heating system hoses from the thermostat and disconnect the temperature sensor connector.



3. Remove the thermostat housing from the cylinder head (thermostat mounting bolts are indicated by arrows).



4. Remove the spring retaining ring and remove the thermostat from the housing.

5. Checking the thermostat.

6. Place the thermostat in a vessel with water and heat it slowly, observing the opening of the thermostat.

7. At a temperature of 89–93°C, the thermostat begins to open. The thermostat reaches full opening at a temperature of 99–102°C; tolerance: ±3°C.

8. Installation is performed in the reverse order of removal. Be sure to use a new sealing ring and check the tightness of the cooling system.

This article was borrowed from the website: FORDBOOK.ru