Removing
Engines 1.4 and 1.6 liters
Partially drain the liquid from the cooling system. Remove the rear timing belt guard.
Remove the two screws securing the thermostat housing, then remove the housing.
You can also remove the coolant hose from the thermostat housing, then remove the housing.
Remove the thermostat from the cylinder head, bearing in mind that coolant may leak from the lower radiator opening even if the liquid has been partially drained from the cooling system. Remove the O-ring from the thermostat. The operation of the thermostat can be checked as described later in this section.
Engines 1.8 and 2.0 l
Partially drain the liquid from the cooling system. Disconnect the upper radiator hose from the thermostat cover.
Remove the three thermostat cover screws. Remove the sealing ring.
The operation of the thermostat can be checked as follows.
If necessary, you can replace the thermostat in the kit.
Checking work
The thermostat can be tested by hanging it in a container of water. Heat the water to a boil - by this point the thermostat should open.
With a thermometer, you can set the exact opening temperature of the thermostat and compare it with the required specification. In addition, the opening temperature is indicated on the thermostat itself.
A thermostat that does not close when the water cools should be replaced.
Installation
Engines 1.4 and 1.6 liters
Installation of the thermostat is carried out in the reverse order of removal; a new O-ring is used and the following points are taken into account.
Check that the projections on the thermostat housing fit into the grooves in the cylinder head.
Install rear timing belt cover as directed in chapter 2.
Fill the cooling system.
Engines 1.8 and 2.0 l
Installation is carried out in the reverse order of removal, while it is necessary to install a new sealing ring, and after completion of work, fill the cooling system.
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