Removing and checking the thermostat
When checking the thermostat on a car after starting a cold engine, the bottom hose from the radiator should remain cold for a while
Then (after the temperature of the coolant reaches 85-92 ° C) quickly heat up, which indicates the beginning of the circulation of the coolant in a large circle.
To dismantle the thermostat, drain the coolant.
For the convenience of unscrewing the front upper screw securing the thermostat housing, use a Phillips screwdriver to loosen the clamp on the radiator outlet hose.
Slide the clamp along the hose.
Without removing the hoses from the nozzles of the thermostat housing, unscrew the three screws securing the thermostat housing with a 5 hexagon.
Disconnect the housing from the exhaust pipe.
Having inserted pliers with narrow jaws into the holes of the fixing plate, and compressing the thermostat spring, turn (in any direction) the plate so that it comes out from behind the protrusions of the body.
Remove the thermostat from the housing.
Remove the rubber sealing ring from the groove of the exhaust pipe.
If the O-ring is damaged or not elastic, it must be replaced with a new one
To check the thermostat, lower it into a vessel with coolant.
We heat the vessel, simultaneously stirring the liquid, and controlling the beginning of the opening of the main valve with a thermometer.
The valve stem should begin to retract at (85±2) ˚C and fully retract (minimum 8 mm stroke) at (100±2) °C.
Install the thermostat in reverse order.
Replacing the expansion tank
If there is coolant in the expansion tank, we substitute a wide container for collecting liquid under the car, in the area where the tank is located.
Loosen the inlet hose clamp with a Phillips screwdriver and remove the hose from the tank pipe (the battery is removed for clarity).
Use a Phillips screwdriver to loosen the clamp of the steam outlet hose and remove the hose from the tank nozzle
With a head of 10, we unscrew the nut 1 and two bolts 2 for fastening the tank
Remove the tank.
Install the expansion tank in reverse order.
Removing and installing the radiator electric fan
Disconnect the wire terminal of the "negative" battery terminal.
Remove the air filter housing
Pressing the lock of the block, disconnect the block of the wiring harness of the engine control system from the fan motor.
With a head of 10, we unscrew the two nuts securing the electric fan shroud to the radiator on the right side, and with a head of 8, two bolts on the left side.
Points for fastening the casing of the electric valve yator to the radiator: 1 - bolts; 2 - nuts.
Remove the electric fan with the casing assembly.
Having prying with a screwdriver, we take out the locking bracket from the groove of the motor shaft
Prying off the impeller with two screwdrivers
Compress the impeller from the motor shaft
With a head of 10, we unscrew the three nuts securing the electric motor to the casing and disconnect them
We assemble and install the radiator fan in the reverse order.
When installing the impeller, the groove made in it must be aligned with the pin pressed into the hole in the motor shaft.
Replacing the radiator
On a cold engine, drain the coolant from the radiator.
Remove the electric fan.
Using a Phillips screwdriver, we loosen the clamps securing the radiator outlet and inlet hoses.
Remove the inlet and outlet hoses from the radiator pipes.
With a head of 10, we unscrew the nut of the right fastening of the radiator to the upper cross member of the radiator frame.
Similarly, we unscrew the nut of the left fastening of the radiator to the upper cross member of the radiator frame (the nut is not visible in the photo).
We raise the radiator, removing the pins of its lower attachment from the rubber pads, and move it to the left so that it comes out from behind the generator.
By tilting the radiator towards the engine, use a slotted screwdriver to loosen the band clamp securing the steam outlet hose
Remove the hose from the radiator fitting
Removing the heatsink
Radiator with bottom mounting rubber pads
Install the radiator in reverse order
If the rubber cushions were removed along with the radiator, then when installing it, first insert the cushions into the holes of the lower cross member of the radiator frame.
Torn or loose cushions should be replaced with new ones.
We replace the tape clamp of the steam outlet hose with a worm gear.
Pour the coolant into the cooling system and bring the liquid level in the reservoir to normal.
Replacing the coolant pump
Drain the coolant.
Remove the camshaft pulley (see "Camshaft seal replacement").
Remove the timing belt tensioner (see "Checking the condition and replacing the timing belt").
With a head of 10, we unscrew the nut and bolt securing the rear timing cover.
Using a 5 hexagon, we unscrew the three screws securing the coolant pump, which simultaneously fasten the back cover
Remove the rear timing cover
Having installed a slotted screwdriver under the tide on the pump housing, we squeeze the pump from the cylinder block.
Remove the coolant pump and remove the gasket.
Before installing the pump, we clean the adjacent surfaces of the pump and cylinder block from the remnants of the old gasket.
Replace the pump gasket with a new one.
Install the coolant pump in reverse order.
Please note that the pump and gasket are installed in only one position - with the pump control hole down.
Apply sealant to both sides of the gasket before installation.
Replacing the coolant temperature gauge sensor
Drain part of the coolant from the engine cooling jacket.
Squeezing the clamps of the sensor wire block, disconnect the block from the sensor
Use the 21 key to turn off the sensor
The sensor has a tapered thread, so its connection to the cylinder head does not need additional sealing.
Install the coolant temperature gauge sensor in reverse order.