Withdrawal
The thermostat is located in the coolant outlet at the front of the cylinder block.
1. Drain the coolant.
2. Unscrew the 2 fastening bolts -1- and remove the connecting pipe -2- from the coolant pump. Collect the leaking liquid. Take the branch pipe with the attached hose to the side.
3. Remove thermostat -4- and O-ring -3-. To do this, turn the thermostat 90° (1/4 turn) to the left and remove.
Examination
4. measure size (A) at the thermostat.
5. Heat the thermostat in water. In this case, the thermostat should not touch the walls of the vessel.
6. Check with a thermometer the temperature of the beginning and end of opening for compliance with the requirements of the Specifications
7. After heating the thermostat to a temperature of + 100°C, the size (b) compared to size (A) should be 7 mm larger. The stroke from the beginning to the end of the opening of the thermostat must be at least 7 mm.
Installation
8. After heating the thermostat to a temperature of + 100°C, the size (b) compared to size (A) should be 7 mm larger. The stroke from the beginning to the end of the opening of the thermostat must be at least 7 mm.
9. Reinstall the thermostat.
Warning: For a 1.8 l engine, insert the thermostat and turn it 90° (1/4 turn) to the right. Installation position: The thermostat clamp must be vertical.
10. Lubricate the new O-ring with coolant and install.
11. Fasten the connecting pipe with a torque of 15 Nm.
12. Fill the system with coolant.
13. On the engine 1.8 l (AGU) with air conditioning: Secure the air conditioning compressor with 45 Nm and fit the ribbed belt.
14. Check the cooling system for leaks.
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