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Substitution coolant
The cooling fluid must be replaced after any work on the cooling system from the draining coolant. If the repair was replaced with cylinder head, head gasket, radiator or heat exchanger oil, coolant has to be replaced. This is due to the fact that the anti-corrosion additive in the coolant during engine operation and the precipitates creates corrosion protection. The coolant in the former operation, anticorrosion additives are not sufficiently active to form a protective layer on newly installed parts. Drain coolant must be collected and disposed of.
A WARNING When you open the cover of a broad tank on the hot engine must be careful, as the escaping steam can cause severe burns. Close the expansion tank with a thick layer of tissue and slowly remove the lid until the hissing sound. After stopping slowly remove hiss to the end and remove the cap from the expansion tank. |
Remove the expansion tank cap.
| Fig. 3.1.5. Location screws bottom mudguard of a motor compartment
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| Fig. 3.2.2. Location screws bottom mudguard of a motor compartment
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| Fig. 3.3.6. Location clamps securing the bottom mudguard of a motor compartment
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| Fig. 3.4.2. Location screws bottom mudguard of a motor compartment
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Install the engine under the sump VAG 1306 to collect the coolant.
Cars with diesel engines of 1.9 liters
| Fig. 7.1. Location screws heater exhaust pipe and additional heater noise insulation
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Unscrew the heater exhaust pipe and additional noise insulation heater (Fig. 7.1).
Cars with petrol engines of 1.8, 2.4 and 2.8 liter and 1.9-liter diesel engines
| Fig. 7.2. Location radiator drain plug
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Remove the drain plug of the radiator (Fig. 7.2), and drain the coolant. To coolant does not shed, instead of a threaded plug insert the hose. When installing the plug replace the O-ring.
| Fig. 7.3. Location clamp fastening the lower radiator hose on cars with petrol engines of 1.8 liters
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Loosen the clamp and remove the radiator lower hose. Drain the coolant (fig. 7.3).
Cars with petrol engines of 1.8 liters
| Fig. 7.4. Location threaded plug on the housing of the water pump
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Remove the drain plug from the housing of the water pump (Fig. 7.4).
Cars with petrol engines of 2.4 and 2.8 liters
| Fig. 7.5. Location tube draining coolant from the engine block
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Remove from the engine block drain plug drain the coolant as shown in Fig. 7.5 arrow. When installing the plug you want to use a new sealing ring.
Cars with diesel engines of 1.9 liters
| Fig. 7.6. Connection hose to the oil cooling system heat exchanger
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Disconnect the coolant hose from the oil heat exchanger (Fig. 7.6).
Cars with diesel engines of 2.5 liters
| Fig. 7.7. Location of the spring retainer (1) the sensor and the drain plug (2)
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Remove the spring clamp 1 (Fig. 7.7) and remove the gauge from the cooling hoses.
| Fig. 7.8. Place a hose attachment (1) to the oil radiator and hoses (2 and 3) cooling system
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On the left side of the engine, disconnect the hose 1 (Fig. 7.8) from the oil cooler. To drain the remnants of the coolant is supplied under pressure air through the surge tank cap. If coolant is very dirty, rinse the cooling system. Since it is impossible to drain the coolant from the cooling system completely, it is recommended every time you drain the coolant to wash the cooling system. Replace the lower radiator hose. Replace the drain plug in the radiator (see. Fig. 7.2).
Cars with petrol engines of 1.8 liters Replace the drain plug with a new O-ring into the housing of the water pump and tighten to 30 N ?� m (see. Fig. 7.7).
Cars with petrol engines of 2.4 and 2.8 liters Screw in the engine block drain plug drain the coolant with a new seal and tighten it to 20 Nm (Fig. 7.5).
Cars with diesel engines of 2.5 liters Replace the sensor and secure it with a spring clamp 1 (Fig. 7.7) On the left side of the engine, connect the hose 1 (Fig. 7.8) to the oil cooler.
All models Instead, the expansion tank cap screw threaded adapter VAG 1274/1 with a tube diameter of 42 mm and a height of 100 mm. This is necessary in order to completely fill the cooling system of the engine cooling liquid and to remove it from the air. In the absence of a special device can be made independently. Alternatively, you can unscrew the expansion tank from an arm, lift it with the hose connection by 10 cm and secure in this position.
Cars with petrol engines of 1.8 liters Remove the rubber seal waterproof housing at the rear of the engine compartment.
| Fig. 7.9. The direction of removal of the rubber seal waterproof casing (1)
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| Fig. 7.10. Location holes on the coolant return hose from the heat exchanger by removing the air from the cooling system of cars with petrol engines of 1.8 liters
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To remove air from the cooling system, loosen the hose clamp and pull off coolant return from the heat exchanger so that the hole in the hose has shifted from the nozzle (Fig. 7.10). The cooling liquid in a broad tank fill up until it begins to flow through the vent hole in the coolant return hose from the heat exchanger (see. Fig. 7.10). Replace the coolant return hose and fix its collar.
Cars with petrol engines of 2.4 and 2.8 liters
| Fig. 7.11. Location coolant drain valve on petrol engines of 2.4 and 2.8 liters
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Open the tap to drain the coolant pipe on the front of the cooling system between the power steering pump and the left cylinder head (Fig. 7.11). The cooling liquid is filled into the expansion tank until until it begins to flow through the tap to drain the cooling fluid (see. Fig. 7.11). Turn the faucet, tighten it to 20 Nm.
Cars with diesel engines of 1.9 liters Remove the rubber seal waterproof housing at the rear of the engine compartment.
| Fig. 7.12. Location holes on the coolant return hose from the heat exchanger by removing the air from the cooling system of cars with diesel engines 1.9 L
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To remove air from the cooling system, loosen the hose clamp and pull off coolant return from the heat exchanger so that the hole in the hose has shifted from the nozzle (Fig. 7.12). The cooling liquid is filled into the expansion tank until until it begins to flow through the vent hole on the hose coolant return (see. Fig. 7.12). Replace the coolant return hose and fix its collar. Connect the coolant hose to the oil cooler (see. Fig. 7.6).
Cars with diesel engines of 2.5 liters
| Fig. 7.13. Location cranes to remove the air from the cooling system fittings on the heater bulkhead cars with diesel engines of 2.5 liters
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Open the taps on two turns the vent located on the heater unions on the bulkhead (Fig. 7.13). The cooling liquid in a broad tank fill up until it begins to flow through the vent cocks (see. Fig. 7.13).
All models Remove the surge tank device, which is installed with the lid, and place the lid on the expansion tank. Set the temperature of the heater to maximum temperature. Start up the engine and let it run for 3 minutes at a speed of 2000 min-1. Check the coolant level, if necessary, finish it to norm. On the hot engine coolant level should be at the level of the mark MAX, the engine is cold - between labels MAX and MIN.
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