Some car engines are equipped with a water distributor with a built-in thermostat
If the thermostat fails, you need to change the water distributor
The water distributor has a thermostat with a solid temperature-sensitive filler, which maintains the operating temperature of the coolant and reduces the engine warm-up time.
The water distributor is installed on the rear end of the cylinder head.
When the coolant temperature is up to 88˚ C, the thermostat is completely closed and the liquid circulates through a small circuit, bypassing the radiator, which speeds up engine warm-up.
At 89˚ C, the thermostat begins to open, and at 99˚±2 C, it opens completely, allowing fluid to circulate through the radiator.
To remove and install the water distributor, you will need: a 10 wrench, pliers, a flat-blade screwdriver, a container for draining the coolant.
To check the thermostat on the car, start a cold engine and touch the lower radiator outlet hose, it should be cold.
After the coolant temperature reaches 90-95˚ C, the hose should begin to heat up quickly, indicating that the fluid has begun to circulate through a large circle of the cooling system.
If this does not happen, the water distributor must be replaced.
Draining the coolant – “Replacing the Renault Megan 2 coolant".
Pry off the wire harness bracket
Flip back the bracket and take the wiring harness to the side
Squeeze the bent ears of the radiator inlet hose clamp and slide the clamp along the hose
Disconnect the hose from the water distributor pipe
Squeeze the bent ears of the heater inlet hose clamp and slide the clamp along the hose
Disconnect the hose from the water distributor pipe
We press the clamp of the block of wires of the coolant temperature sensor
Disconnect the block from the sensor
Unscrew the water distributor mounting bolts
Remove the bracket for the heater hose holders and the water distributor
U install the water distributor and all the details in the reverse order
Fill in coolant and remove air pockets from the engine cooling system.