Thermostat and related components
1 - From the expansion tank; 2 - Bolt; 3 - Mounting bracket; 4 - To the radiator; 5 - CTS (temperature sensor); 6 - Sealing ring (subject to replacement); 7 - Sealing ring (subject to replacement); 8 - Drain plug; 9 - To the heater heat exchanger; 10 - Injection system coolant temperature sensor; 11 - Nut; 12 - Thermostat housing; 13 - Thermostat
Removal
1. The thermostat components are shown in the illustration.
2. Disconnect the negative battery cable, then drain the cooling system.
Petrol models
1. The thermostat housing is installed on the left side of the cylinder head.
2. Loosen the fastening clamp and disconnect the cooling system hose from the thermostat cover.
3. Unscrew the fastening bolts
and remove the thermostat cover from the engine together with the sealing ring/gasket. During assembly, the ring/gasket must be replaced without fail.
4. On 1.3 l models of early years of production (until February 1996.) and on all 1.6L models, remove the thermostat from the housing. Try to remember its installation position.
5. On 1.3 l models of later years of production (since February 1996.) the thermostat assembly is secured in the casing cover with a special clamp. Remembering the installation position of each component, release the clamp,
remove the spring
and remove the thermostat plunger from the cover.
Diesel models
1. The thermostat is installed in the base of the water pump housing. To provide access, apply the parking brake, then jack up the front of the car and place it on supports. Loosen the mounting screws and remove the crankcase protection panel.
2. Loosen the clamp and disconnect the coolant hose from the thermostat cover.
3. Unscrew the fastening bolts and remove the cover from the thermostat housing together with the sealing ring. The ring must be replaced during assembly.
4. After removing the cover, take the thermostat assembly out of the casing. Try to remember its installation position.
Information published on the website: SKODABOOK.RU
Checking the correct functioning
Attention! On 1.3 l models of later years of production (since February 1996.) the check is performed after installing the components in the thermostat housing cover.
1. A rough check of the thermostat's proper functioning can be made by tying it to a wire and lowering it into a container of water. As the water heats up and boils, the thermostat valve should open, otherwise the assembly must be replaced.
2. If you have a suitable thermometer, you can determine the exact opening temperature of the thermostat - compare the measurement result with the marking data on the assembly body or the requirements Specifications at the beginning of this chapter.
3. A thermostat that does not close when the water cools down also needs to be replaced.
Installation
Petrol models
1. On 1.3 l models of later years of production (since February 1996.) install the thermostat plunger with spring into the housing cover, then snap the retainer into place.
2. On 1.3 models produced before February 1996 and 1.6 L models, install the thermostat in the casing (make sure the assembly is positioned correctly).
3. On all models, install a new O-ring/gasket, then place the thermostat cover onto the housing and tighten the thermostat cover mounting bolts to the specified torque.
4. Connect the cooling system hose to the thermostat cover and tighten the clamp securely.
5. Fill the cooling system and connect the negative cable to the battery.
Diesel models
1. Install a new sealing ring onto the thermostat cover.
2. Place the thermostat assembly into the housing (make sure it is installed correctly), then put the cover on. Screw in the mounting bolts and tighten them to the required torque.
3. Connect the cooling system hose and secure it with a clamp.
4. Reinstall the crankcase guard, tighten the mounting screws securely, then lower the vehicle to the ground.
5. Fill the cooling system and remove air locks from it and connect the negative cable to the battery.