Volkswagen Golf Quiz
Engine

Engine Cooling System

In this manual: Engine
General Information — 9Engine — 14Engine Disassembly and Assembly, 1.1 and 1.3 l Engines — 15Engine Disassembly and Assembly, 1.6 and 1.8 L Engines — 13Diesel Engine Disassembly and Assembly — 16Fuel System — 1Carburetor Engine Fuel System — 19Fuel injection system — 17Diesel Engine Fuel System — 15Clutch — 12Transmission — 37Transmission — 8Front-wheel drive — 5Steering — 12Front Suspension — 9Rear Suspension — 4Brake System — 16Body — 26Electrical System — 42Wiring Diagrams — 24
~1min read

PROCEDURE

The cooling system is fully sealed and consists of the radiator, water pump, thermostat, expansion tank, connecting hoses and electric cooling fan. The system operates as follows. While the engine is cold, the thermostat is closed and the coolant circulates through the small circuit, bypassing the radiator. When the coolant temperature reaches approximately 87 °C, the thermostat begins to open and the coolant starts circulating through the large circuit via the radiator.

The electric cooling fan is switched on by the thermal switch at a coolant temperature of 93–98 °C and switched off at a temperature of 88–93 °C. Cooling system capacity for engines with a displacement of 1.1 and 1.3 L – 5.5 L, for engines with a displacement of 1.6 and 1.8 L, and for diesel engines – 6.5 L.

Test yourself

A quick Volkswagen Golf quiz: every answer comes with an explanation and a link to the manual page.