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BMW 7 Series
E38
Power unit
Cooling system
Cooling, Heating and Ventilation System Specifications

Cooling, Heating and Ventilation System Specifications (BMW 7 Series E38)

Temperature of switching on/off of the cooling system fan drive clutch, °C

Engines M52, M52TU

90//60

Engines M60/1, M60/1, M62 (B 35, B 44)

95±4//60

Engine M62 B 46

92±4//60

Engine M73

102±4//75

Cooling system fan drive clutch bearing clearance, mm

Engines M52, M52TU (at Ø 120 mm)

± 0.65

Engines M60/1, M60/1, M62 (B 35, B 44) (at Ø 156 mm)

± 0.65

Engines M62 B 46 and M73 (at Ø 156 mm)

± 0.45

Thermostat opening start temperature (stamped on the thermostat), °C

Engine M51

Engine M52

Engine M52TU

Engines M57, M67

Engine M73

Current consumption of additional heater at maximum power, A

Oil cooler capacity, including hoses, l

12.5±1

Engines M51, M60, M62

0.75

Engine M73

1.0

Test pressure of oil cooler, atm

Test pressure of engine cooling system, atm

1.5

Test pressure of the radiator of the engine cooling system, atm

Engines M52TU, M57, M67

2.0

Engines M51, M52, M60/1, M60/2, M62, M73

1.5

Opening pressure of the safety valve of the excess pressure of the cooling system, atm

Petrol engines

2^+0.1

Diesel engines

1.4	-0.2
	+0.2

Vacuum valve opening pressure of the cooling system, atm

0.1

Air conditioning system

Refrigerant type	R135a
Amount of refrigerant, g
Issued before 12.1997. (large desiccant tank)	1210±25
Since 12.1997
Engine M51	1210±25
Engines M52, M57, M62, M73	680±10
Engine M67	700±25
L7 (without/with rear K/V)	1270±25//1400±25
Pressure at the inlet/outlet of the safety valve K/V, atm	14//1.8
Working pressure K/V, atm	2÷35

Tightening force of threaded connections, Nm

Coolant drain plug in the cylinder block	25
Union nut for fastening the fan drive coupling to the water pump	40
Fastening the cooling system fan to the drive clutch	10

[Information obtained from this online resource «BMWMAN.RU»]

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Article verified: Polikarpov Saveliy

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БМВ E38: Cooling system

General information and precautions
Removal and installation the fan shroud
Removal and installation the cooling system radiator
Removal and installation the expansion tank
Removal and installation an additional fan assembly with a casing

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