Engine cooling and lubrication system Volkswagen Polo 4

Lubrication system
All-weather oils are provided for lubricating engines, so engine oil should not be changed with the onset of a new season (summer Winter). All-weather oils are produced on the...

Checking the oil pressure and oil pressure sensor
The test requires a pressure gauge equipped with a threaded hole for screwing in the hydraulic switch. The location of the hydraulic switch depends on the engine version. 1.2/1.4L...

Oil pump/oil pan
1.2L petrol engine 1 - hydraulic switch, 0.3-0.7 bar, 25 Nm 2 - guide bushings 3 - oil pump Replace only as an assembly. 4 - bolt, 25 Nm 5 - oil pan Before installation, the...

Coolant circulation
Coolant circulation is continuously maintained by a coolant pump. While the engine is cold, coolant circulates only in the engine head and cylinder block and in the heat...

Antifreeze
The cooling system is filled year-round with a mixture of water and antifreeze with an anti-corrosion additive from the VW / SEAT concern. This mixture prevents freezing and...

Coolant replacement
If during the repair of the engine cooling system the coolant was drained, then it must be replaced. Coolant replacement is not included in the scope of maintenance. If during the...

Removal and installation of the thermostat
1.2-/1.4L displacement petrol engine except 1.4L FSI engine 1 - connecting pipe 2 - self-tapping screw 3 - sealing ring 4 - thermostat 5 - to the heat exchanger 6 - from the...

Checking the diesel engine thermostat
Note: With a 1.2-/1.4L displacement petrol engine other than the FSI engine, no temperature checks can be performed. You can only check whether the thermocouple pin extends when...

Removal and installation of the pump of a cooling liquid (gasoline engines)
1.2L displacement petrol engine, 1.4L displacement FSI engine Removing Drain the coolant see relevant chapter . Remove poly V-belt . Loosen the water pump pulley bolts. Loosen the...

Removal and installation of the pump of a cooling liquid (diesel engines)
Diesel engine 1.4-/1.9-I-PD-TDI Removing Drain the coolant see relevant chapter . Remove toothed belt . Release screws -1- and carefully remove coolant pump -2- from cylinder...

Removal and installation of a radiator
1 - radiator 2 - sealing ring Always replace. 3 — the top hose of a cooling liquid Attaches to the radiator with a clamp. Check the security of fastening. 4 - guide air box 5 -...

Diagnosis of malfunctions of the cooling system
Fault: The coolant temperature is too high, the indicator on the instrument panel lights up during the trip.

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