Car cooling system VW Golf 1, diesel

Description of the engine cooling system
The cooling system is designed to remove excess heat generated during fuel combustion and maintain the normal thermal regime of the engine. How cooling works About 6.5 liters of...

Checking the coolant level
The engine needs a certain amount of coolant to run properly, even if the car was manufactured after August 1982. you should check the fluid level in the expansion tank in the...

Coolant replenishment
Coolant loss is a sign of a malfunction or defect. Coolant is not consumed and cannot evaporate in a closed cooling system. What to do in case of loss of coolant? See section "...

Freeze protection
In the cooling system, the necessary cooling of the engine is provided not only by pure water, but also by a mixture of anti-corrosion and anti-freeze agents. Therefore, it is...

Checking the tightness of the cooling system
Are the hoses at the radiator and engine tight, as well as thinner hoses leading to the heating system or to the oil cooler? Are there cracks in the hoses? Replace if necessary....

Radiator — design description
The radiator has plastic tanks, between them there are aluminum fins and tubes. Thin-walled tubes are connections between the left and right radiator tanks. To increase the...

Replacement of hoses intended for the coolant
To replace, you should buy original hoses that have the correct shape and hose clamps. Drain the coolant into a container. Disconnect hose clamps, remove hoses. Disconnect the...

Radiator cleaning
Before and after the summer season, the radiator fins should be cleaned of adhering insect particles. otherwise, the cooling efficiency will deteriorate. Remove radiator cover...

Coolant drain
Remove the expansion tank cap. Move the heater tap lever to position "Warm" ("Warm"). Substitute container. Remove the bottom hose from the radiator. If it is necessary to drain...

Filling the cooling system
Move the heater tap lever to position "Warm" ("Warm"). Pour in antifreeze. The fluid level must reach the top mark ( see picture ). Close the expansion tank cap. Start, warm up...

Removing the radiator
Drain coolant. Remove the water hoses from the radiator. Remove the radiator fan dare with the diffuser. In production models before December 1980, unscrew the nuts at the rubber...

Removing the expansion tank
In an old car, the expansion tank may become leaky. This is due to the fact that the plastic has become brittle. Use pliers to disconnect the hose clamps at the tank. Remove hoses...

Cooling system plug
The plug of the cooling system plays an important role in the circulation circuit, where there is excess pressure. When the plug is closed, the sealing surface is firmly attached...

Checking the safety and vacuum valve
Checking the safety valve The correct operation of the safety valve is checked using a control device. First, pressure is created in the system. At a pressure of 0.9-1.15 bar (in...

Thermostat — design description
In simpler terms, the thermostat determines whether the water in the radiator should be cooled or not. Therefore, it determines in which direction the coolant should circulate:...

Removing the thermostat
If a new thermostat is installed, the thermostat housing O-ring should also be renewed. Completely drain the coolant; Raise the car on stands from the front. Disconnect the hose...

Thermostat check
With a home thermometer, you can check for yourself whether the thermostat opens at the prescribed temperature. Remove thermostat. Hang the thermostat in a container with water,...

Water pump — removal and installation
The water pump circulates the coolant. The pump is located on the right side of the engine when facing the direction of travel. The pump is driven by a V-belt. The water pump is...

V-belt — check
On these pages you will find only the most necessary instructions regarding the V-belt for driving the water pump and alternator. Read more about the V-belt in the chapter "...

Radiator fan — design description
Our engines are fitted with an electric radiator fan that only comes on when needed. In the left radiator tank (in the direction of travel) the switch is screwed in at the bottom....

Radiator Fan Malfunctions
A failed fan does not mean the ride is over. After the engine has cooled down to some extent, you can drive continuously at medium speeds to the nearest workshop. In this case,...

Removing the fan motor
Remove plug from radiator fan. Unscrew the four diffuser bolts and remove them together with the fan motor. Unscrew 3 nuts at the diffuser, remove the fan motor. Different...

Electrolysis in the cooling system
Electrolysis can occur in a cooling system with an aluminum heatsink and an energized thermal switch. Electrolysis is the separation of constituents from a solution of chemical...

Checking the heatsink and fan housing
The fan housing may be under tension and thus cause electrolysis. The check is carried out as follows: Remove the wires from the thermal switch. Connect a voltmeter between the...

Checking the thermal switch
If during the previous check the voltage was not fixed on the scale, then the thermal switch should be checked. Unscrew the thermostatic switch. It should be replaced if it has...

Malfunctions in the cooling system
Faults Cause Trouble-shooting The arrow of the temperature indicator is placed in the red field or completely to the right; red overheating warning light flashes or lights up...

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