Water pump
1. Check the water pump housing for cracks, damage, chips. If necessary, replace the water pump assembly.
2. Check the pump bearing for noise and increased resistance to rotation. If necessary, replace the pump assembly.
3. Check seals for leaks. If found, replace pump assembly.
Note. A small amount of «dew» from the drainage channel is considered the norm.
Thermostat
1. Check the thermostat valve opening temperature by immersing the thermostat in hot coolant. Valve opening start temperature: 82 'C. full valve opening temperature: 95°C. If the valve stroke at full opening is less than 8 mm, replace the thermostat.