power steering BMW 745i 2004 E65 N62B44 Engine Workshop Manual

Downloaded from www.Manualslib.com manuals search engine Table of Contents
SubjectPage
N62B44 Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Objectives of the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Purpose of the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Engine Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Components
Fresh Air System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
- Air Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
- Throttle Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
- Intake Manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
- Crankcase Venting System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Exhaust System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
- Exhaust Manifold with Catalytic Converter . . . . . . . . . . . . . . . . . . . . . . . 13
- Silencers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
- Secondary Air System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Ancillary Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
- Belt Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
- Alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
- Air Conditioning Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
- Starter Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
- Power Steering Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Cylinder Heads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
- Engine Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
- Valve Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
- Valvetronic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
- Bi-VANOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
- Vacuum Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
- Chain Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Downloaded from www.Manualslib.com manuals search engine Ancillary Components and Drive Belts
Drive Belts
The belt drive has two components and is subdivided into the main and A/C drives. Both
belts are driven by the crankshaft pulley.
A 4 rib belt is used to drive the air conditioning compressor and a 6 rib belt is used for the
main drive. Each drive belt has a maintenance free tensioning unit with tensioning pulley
and torsioner.
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The tensioning pulley is pushed back using a
Torx tool in the recess provided (1) and fixed in
this position by inserting a locking pin as shown
(2).
16
N62 Engine
42-02-15 Ancillary Components and
Drive Belts
1. Air Conditioning Compressor
2. 4 Rib A/C Drive Belt
3. Crankshaft Pulley
4. Water Pump
5. Tensioning Unit Main Drive Belt
6. Alternator
7. Deflection Pulley
8. Power Steering Pump
9. 6 Rib Drive Belt
10. Tensioner Unit A/C Drive Belt
42-02-16

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The alternator regulator voltage is influenced by the ECM - BSD interface. The bat-
tery charge voltage can therefore be up to 15.5 V, depending on the battery temperature.
If a battery charge voltage of up to 15.5 V is measured, the regulator is not faulty. A high
charge voltage indicates a low battery temperature.
Air Conditioning Compressor
The “clutch free” A/C compressor is manufac-
tured by Denso. It functions continuously with
the engine running. The compressor is a 7-
cylinder swash plate type. The displacement
can be reduced to less than 3% when air con-
ditioning is not requested (no refrigerant is sup-
plied to the refrigerant circuit).
There is an internal compressor refrigerant cir-
cuit to maintain lubrication. The IHKA electron-
ics regulate the compressor output via an
external control valve (1).
Starter Motor
The starter motor is located on the right-hand
side of the engine below the exhaust manifold,
and is a compact planetary drive starter with a
1.8 kW output.
1. Starter motor with heat protective cover.
Power Steering Pump
The power steering pump is a tandem radial piston pump on vehicles equipped with
Dynamic Drive. A single vane pump is installed on vehicles without the Dynamic Drive.
Further information about the power steering pump can be found in the Chassis Dynamics
section.
19
N62 Engine
42-02-19
42-02-03