BMW 3 Series E46

since 1998 release

Repair and operation of the car

BMW 3 Series E46
+ BMW 3 cars (E46)
+ Current leaving and service
+ Engine
- Cooling systems, heating
   + Engine cooling system
   + Heater and conditioner of air of salon
+ Power supply systems, injection and release
+ Engine electric equipment
+ RKPP and transmission line
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Schemes of electric equipment

Cooling systems, heating


General parameters

Arrangement of sensors in the right forward part of a motive compartment

Separate characteristics are provided also in the text of the Head and in case of obligation of their performance are highlighted in bold type

Cooling system design

Thermosiphon with the bladed water pump. Thermostatic adjustment. With a separate broad tank. The fan with the viscous coupling. The additional electric fan joins and switched off by a thermoswitch

Cooling liquid


mix of soft water (60%) and antifrizny concentrate (40%)

Antifrizny concentrate

Aral Antifreeze Extra, DEA Khlerfrostschutz, GlycoShell, Glysantin Protect Plus, Mobil Frostschutz 600
System volume
316i, 318i6.0
320i, 323i, 328i8.4
320d 7.0
The amount of antifreeze added to the cooling system for ensuring the required frost resistance (at the same time as much a cooler to merge)
It is shown below how many antifreeze should be added to provide desirable frost resistance.
Example: Measurement on the engine 316i shows protection up to the temperature of -10 °C. In this case it is necessary to merge 2.0 l of cooling liquid from system and instead of it to fill in 2.0 l of a pure concentrate. It will provide protection of the engine up to the temperature of -35 °C.

The values given in the table are valid at a temperature of cooling liquid about +20 °C.
Ridge maple belts.

318i 6 PK x 1733 (5 PK x 950)
320d 5 PK x 2030 (5 PK x 836)
320i, 323i, 328i6 PK x 1538 (5 PK x 863)
Air conditioner compressor
ProducerNippondenso Seiko-Seiki
Oil 4.3 – 4.8 ounces (129-144 ml)
Coolant34.4 – 36.0 ounces (1032-1080 ml)
Efforts of tightening of threaded connections
The moments of an inhaling of fixture are given also in the text of the Head and on some illyustratsiyakh*.

* The moments of an inhaling highlighted in the text in bold type are subject to exact observance; the efforts which are not highlighted in bold type are given only approximately
The water pump on the engine
M6 bolt 10 N • m
M10 bolt20 N • m
Pulley 15 N • m