Removing and checking the thermostat

When checking the thermostat on a car after starting a cold engine, the lower hose draining from the radiator should remain cold for some time, and then (after the coolant temperature reaches 85-92 ° C) heat up quickly, which indicates the start of circulation of the coolant through large circle

To dismantle the thermostat, drain the coolant.

Replacing the thermostat

Replacing the thermostat

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.

Replacing the thermostat

Replacing the thermostat

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.

Replacing the thermostat

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.

Replacing the thermostat

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 travel) 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 tank location area.

expansion tank replacement

expansion tank replacement

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

expansion tank replacement

With a head of 10, we unscrew the nut 1 and two bolts 2 for fastening the tank

expansion tank replacement

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

radiator fan replacement

radiator fan replacement

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.

radiator fan replacement

radiator fan replacement

Points for attaching the electric fan casing to the radiator: 1 - bolts; 2 - nuts.

Removing the electrics fan with shroud assembly.

radiator fan replacement

radiator fan replacement

Prying off with a screwdriver, remove the locking clip from the groove of the motor shaft.

Prying off the impeller with two screwdrivers

radiator fan replacement

radiator fan replacement

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 electric fan of the radiator of the cooling system in reverse order

radiator fan replacement

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.

heat sink replacement

heat sink replacement

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.

heatsink replacement

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).

heatsink replacement

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.

heat sink replacement

heat sink replacement

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.

heat sink replacement

Removing the heatsink

This is what the Lada Kalina radiator looks like

Replacing the units of the VAZ-21114 engine cooling system

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 sprocket (see "Replacing the camshaft oil seal").

Remove the timing belt tensioner (see "Checking the condition and replacing the timing belt").

water pump replacement

water pump replacement

With a head of 10, we unscrew the nut and bolt securing the rear timing cover.

With a 5 hexagon, we unscrew the three screws securing the coolant pump, which simultaneously secure the back cover

water pump replacement

water pump replacement

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.

water pump replacement

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.

temperature sensor replacement

Squeezing the clamps of the sensor wire block, disconnect the block from the sensor

Use the 21 key to turn off the sensor

temperature sensor replacement

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.