3
Chapter 3
Cooling, heating and ventilation systems
General
System type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pressurised, water pump assisted, thermo-syphon
Radiator filler/pressure cap setting:
Pre-1974 models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.91 bar
1974 models onward . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.05 bar
Thermostat
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Wax
Opening temperatures:
Pre-1976 models:
Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82ºC
Hot climates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74ºC
Cold climates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88ºC
1976 models onward:
Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88ºC
Auxiliary cooling fan
Thermostatic switch settings:
Switches on at . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98ºC
Switches off at . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93ºC
Torque wrench settings Nm lbf ft
Water pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 to 25 14 to 18
Thermostat housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 to 12 6 to 9
Auxiliary cooling fan thermostatic switch - Cooper models . . . . . . . . . . 10 7
Antifreeze - general information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Auxiliary cooling fan - general information, removal and refitting . . . 7
Auxiliary cooling fan thermostatic switch - removal, testing and
refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Coolant level check . . . . . . . . . . . . . . . . . . . . . . .See “Weekly Checks”
Cooling system - draining . . . . . . . . . . . . . . . . . . . . . . . .See Chapter 1
Cooling system - filling . . . . . . . . . . . . . . . . . . . . . . . . . .See Chapter 1
Cooling system - flushing . . . . . . . . . . . . . . . . . . . . . . . .See Chapter 1
Cooling system hoses - disconnection and renewal . . . . . . . . . . . . . 2
Fan belt check and renewal . . . . . . . . . . . . . . . . . . . . . . .See Chapter 1
Fresh air vent assembly - removal and refitting . . . . . . . . . . . . . . . . 13
General information and precautions . . . . . . . . . . . . . . . . . . . . . . . . 1
Heater assembly - dismantling and reassembly . . . . . . . . . . . . . . . . 12
Heater assembly - removal and refitting . . . . . . . . . . . . . . . . . . . . . . 11
Heater water valve - removal and refitting . . . . . . . . . . . . . . . . . . . . . 10
Heater water valve control cable - removal and refitting . . . . . . . . . . 9
Radiator - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Thermostat - removal, testing and refitting . . . . . . . . . . . . . . . . . . . . 5
Water pump - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3•1
Specifications
Contents
Easy, suitable for
novice with little
experience
Fairly easy, suitable
for beginner with
some experience
Fairly difficult,
suitable for competent
DIY mechanic
Difficult, suitable for
experienced DIY
mechanic
Very difficult,
suitable for expert DIY
or professional
Degrees of difficulty
5
4
3
2
1
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