Audi 100 C3 owners manual page 117

text version of content this owner's manual page from owners manual to the vehicle Audi 100, year of production 1982 - 1991:

VEHICLE CARE V-BELT Do not overfill the system. Note Tension checking Excess coolant w ill be forced out through If the radiator fan does not come on Correct V-belt tension is important for the pressure relief valve in the reservoir overall vehicle performance. when the engine becomes hot. when the coolant temperature is very high, check the fuse and replace it if Screw cap on again tightly. Tensioning and replacing of V-belts necessary – see page 136. should be performed by your Audi de- Radiator fan The speed of the radiator fan does aler or a qualified workshop. not depend on the engine speed, See page 163 for V-belt designations. therefore cooling effect cannot be incre- The electric radiator fan is controlled by thermoswitches from the and coolant ased by downshifting. As long as the engine compartment temperature. engine runs smoothly and driving an up- WARNING hill road do To prevent serious personal es not considerably reduce WARNING speed, there is no need to downshift. injury stay well clear of the V-belt After turning off the engine, the radia- when the engine is running. If you tor fan can continue to run (up to 10 must check the V-belt tension turn the minutes). It may also suddenly start to Winter operation engine off and let it cool down. Hot components can burn skin on contact. At the beginning of the winter season, run again even with the ignition Never touch the radiator fan switched off. have the coolant checked for antifreeze blades. They will rotate spontaneously concentration. If you have to add, only use quality phosphate-free antifreeze containing ethylene glycol which is avail-when the thermoswitch turns the fan able at your Audi dealer. on. The radiator fan switches on auto- matically when the coolant reaches a The ratio between water and antifreeze certain temperature and will continue depends on the anticipated outside tem- peratures. to run (even with ignition off) until the coolant temperature drops. T his may last up to about 10 minutes. Always heed WARNINGS on page 102. 115

owners manual Audi 100

owners manual Audi 100 - year of production: 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991 - Audi 100 C3 owners manual EN