Car cooling system Volkswagen Golf 4

Elements of the cooling system
Elements of the cooling system of the 1.8-I petrol engine 1 - radiator; 2 - oil heat exchanger; 3 - water pump/thermostat; 4 - cylinder head/block; 5 - expansion tank; 6 -...

Topping up the coolant
The engine cooling system must be filled with a mixture of water, antifreeze and anti-corrosion agent G12. Additives to the coolant prevent the engine block from freezing and the...

Coolant mixture composition
The antifreeze content in the coolant should not exceed 60%, which corresponds to protection against freezing down to -40°C, since otherwise the protective and cooling properties...

Replacing the coolant
The coolant must be replaced after any work on the cooling system components with draining the coolant. If the cylinder head, cylinder head gasket, radiator or oil heat exchanger...

Draining the coolant
Warning: When opening the expansion tank cap on a hot engine, care must be taken as escaping vapors can cause severe burns. To do this, cover the expansion tank cap with a thick...

Filling the cooling system
1. Prepare the required amount of coolant from 50% water and 50% antifreeze with anti-corrosion additive G12. Petrol engines 1.6/1.8/2.3-I and diesel engines. 2. Connect the...

Removal the thermostat
Location of thermostat on petrol engines 1.6-/1.8-I 1 - thermostat; 2 - sealing ring; 3 - connecting nipple; 4 - bolt Thermostat location on diesel engines 1 - bolt; 2 -...

Checking the functionality of the thermostat
Operating position of the thermostat a - thermostat is closed; b - thermostat open Execution order 1. Measure the length (a) of the closed thermostat. 2. A rough test of the...

Installing a thermostat
Execution order 1. Clean the sealing ring mating surface. 2. Install the thermostat. On 1.8-I petrol and diesel engines, install the thermostat and turn it 90° clockwise. The...

Removal the radiator and fan
Front of the car with the radiator removed 1 - front beam mounting bolts; 2 - bolt (do not unscrew completely); 3 - radiator mounting bolts; 4 - condenser mounting bolts Removal...

Installing the radiator and fan
Radiator of the cooling system 1 - Fan holder mounting bolt; 2 - temperature sensor; 3, 4 - radiator holders Execution order 1. Install the fan holder on the radiator and secure...

Removal and installation a water pump on a 4-cylinder gasoline engine
Water pump mounting elements on a 1.4-I petrol engine 1 - tension roller; 2 - bolt; 3 - gasket; 4 - water pump; 5 - bolts; 6 - bracket; 7 - bolt Water pump engine 1.6-I 1 - bolt;...

Removal and installation a water pump on a 5-cylinder gasoline engine
Unscrewing the water pump belt pulley on the 2.3-I-VR5 engine 1 - pulley mounting bolts; 2 - belt pulley; 3787 - special device for holding pulley Warning: The basic operations...

Removal and installation a water pump on a diesel engine
Water pump for diesel engines 1 - bolt; 2 - guide roller; 3 - bolt; 4 - water pump; 5 - sealing ring Removal 1. Remove the lower engine compartment splash guards. 2. Drain the...

Cooling system hoses
Check the condition of the cooling system hoses and if a defect is found, replace the hose as follows. Replacement 1. Drain the coolant from the cooling system. 2. Remove the hose...

Cooling system malfunctions
CAUSE METHOD OF ELIMINATION The coolant temperature is very high. The control lamp on the instrument cluster is on Not enough coolant in the cooling system Check and, if...

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