BMW N62 Series User Manual

New Generation N62 Engine Chapter 3 P.17
Course Contents/Background Material
© BMW AG, Service Training
- Secondary air system
General information
Fig. 15: N62 air routing
Blowing additional air (secondary air) into the cylinder head
exhaust duct during the warm-up phase results in a thermal
secondary combustion which in turns results in a reduction of
the non-combusted hydrocarbons (HC) and carbon monoxide
(CO) contained in the exhaust vapours.
The energy generated during this process heats up the catalytic
converter faster during the warm-up phase, and increases its
conversion rate.
Index Description
1 Air intake duct
2 Air cleaner housing with intake air silencer
3 Intake pipe with HFM (hot-film air-mass flow sensor)
4 Secondary air valves
5 Secondary air pump
KT-7888

BMW N62 Series Specifications

General

Configuration	V8
Fuel type	Petrol
Valvetrain	DOHC 4 valves per cylinder
Torque Output	340–490 N⋅m (4.4L), 475-490 Nm (4.8L)
Compression Ratio	10.0:1 (4.4L), 10.5:1 (4.8L)
Engine Block Material	Aluminum
Cylinder Head Material	Aluminum
Cooling system	Water-cooled
Redline	6, 500 rpm