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Cooling system fan (VW Passat B5)

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The cooling system fan is driven by the engine via a V-belt with ribs. The fan speed is regulated by a viscous clutch depending on the coolant temperature.

In addition, depending on the model of the installed engine and the vehicle configuration (for example, the presence of an automatic transmission, a factory-installed towing hitch, and air conditioning) the engine cooling system may have an additional electric fan with automatic control.

Warning: After the engine has stopped, the fan may continue to run for some time (up to 10 minutes) rotate – also after the ignition is turned off.


A stopped fan may also suddenly start rotating again after some time if:
  • the coolant temperature increased due to the temperature difference in the engine;
  • when the engine is hot, the air temperature in the engine compartment increases due to intense solar radiation.

This article is available at russian, bulgarian, belarusian, ukrainian, serbian, croatian, romanian, polish, slovak, hungarian
The text has been checked: Tarasov Ivan

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Engine cooling system
Checking the exhaust system
Oil and oil filter change
Types of motor oils
Vehicle identification data
Frequency of car maintenance
Next articles
Spark plugs
Replacing spark plugs
Draining water from the fuel filter (diesel engines)
Replacing the fuel filter (diesel engines)
Checking the tightness of the hoses and fluid leakage
Replacing the air filter element


Similar articles from other manuals for VW cars:
Cooling system data Golf 1 (1974-1984, petrol)
Cooling system Polo 3 (1995-2003)
Pressure testing of the cooling system (petrol engine) Touareg 1 (2002-2006)
Removal and installation the cooling system pump Tiguan 1 (2007-2015)
Engine cooling system — design description Sharan 1 (1995-2000)
Checking the tightness of the cooling system by external… Transporter T4 (1990-2003)
Cooling system connection diagram Caddy 3 (2003-2010)
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Passat B6 
  • General information
  • User manual
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  • Engine repair
  • Cooling and lubrication system
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  • Exhaust system
  • Transmission
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