Disconnect the ground wire from the battery.
Drain the coolant.
Remove all parts that restrict access to the thermostat housing (see pictures).
Loosen the bolts and remove the pipe (2) thermostat (possible with hose (1) - if withdrawal is difficult).
Remove the thermostat and inspect it for the integrity of the external and internal elements.
Hang the removed thermostat together with the thermometer in a pot of cold water so that they do not touch the walls or bottom.
Heat the water by stirring it slightly. Notice when the thermostat starts to open and compare this temperature with the technical data (82°C).
If the thermostat opens too early, replace it. Keep heating the water until the thermostat opens fully (at 95°C), then let it cool down. If the thermostat does not open fully in boiling water or does not close when the water cools, it should be replaced.
Opening stroke should be 8 mm (b - a = 8 mm).
ATTENTION: It is forbidden to operate the car without a thermostat, even at high ambient temperatures, because in the absence of a thermostat, the engine warms up for a very long time and operates at a low coolant temperature. As a result, the intensity of wear of the main parts of the engine increases, and there is also an intensive deposition of resinous substances on the internal walls of the engine.
The thermostat is stopped in the reverse order of removal, taking into account the following:
Use sealant when installing thermostat covers.
The valve in the thermostat must be at the top when installed.
