BMW N62B44 User Manual

Table of Contents
Subject Page
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

BMW N62B44 Specifications

General

Brand	BMW
Model	N62B44
Category	Engine
Language	English

Summary

Objectives of The Module

Purpose of The System

Technical Data

Engine Views

Fresh Air System

Air Routing

Describes the path of intake air from the duct to the cylinder heads.

Throttle Valve

Intake Manifold

Function

Explains how engine speed relates to volumetric efficiency via intake pipe.

Crankcase Venting System

Exhaust System

Exhaust Manifold with Catalytic Converter

Describes the integrated exhaust manifold and catalytic converter component.

Silencers

Details the specifications and types of silencers used in the exhaust system.

Exhaust Gas Flap

Explains the function of the exhaust gas flap for noise reduction at low RPM.

Secondary Air System

Describes blowing air into exhaust ducts for improved emissions and catalyst heating.

Secondary Air Pump (SLP)

Details the electrically operated secondary air pump and its operating conditions.

Ancillary Components and Drive Belts

Drive Belts

Explains the two-component belt drive system driven by the crankshaft pulley.

Alternator

Air Conditioning Compressor

Starter Motor

Power Steering Pump

Cylinder Heads

Engine Covers

Describes the plastic covers for ignition coil cabling and sound absorption.

Cylinder Head Gaskets

Details the multi-layer steel gasket and specific bolts used.

Camshafts

Explains camshaft material, construction, and counterbalances for imbalance.

Valvetronic

Principle of Operation

Explains how Valvetronic combines VANOS and valve lift for engine control.

Valvetronic Motors

Details the location and function of Valvetronic motors for lift adjustment.

Eccentric Shafts

Describes eccentric shafts driven by motors, supported by bearings.

Intermediate Lever and Roller Finger

Explains the lever mechanism for actuating intake valves.

Valve Lift

Bi-VANOS (Variable Camshaft Adjustment)

Camshaft Sensors

Explains sensors monitoring intake and exhaust camshaft positions.

Solenoid Valves

Details VANOS solenoid valves controlling oil flow to camshaft ports.

Mechanical Layout

Describes the VANOS unit's mechanical components and their arrangement.

Hydraulic Actuation - Chamber A

Explains oil pressure application to chamber A for camshaft adjustment.

Hydraulic Actuation - Chamber B

Explains oil pressure application to chamber B for resetting camshaft timing.

Chain Drive

Toothed Chain

Describes the maintenance-free toothed chains driving camshafts and oil pump.

Crankshaft Sprocket

Details the crankshaft sprocket's gear teeth for oil pump and camshaft drives.

Chain Tensioner (cylinder bank 1-4)

Explains the chain tensioner mounted on the cylinder head.

Tensioning Rail Bearing Pin

Describes the hollow bearing pin with a check valve for oil flow.

Chain Tensioner (cylinder bank 5-8)

Details the oil jet and valve for lubricating the bank 5-8 drive chain.

Cooling System

Coolant Circuit

Explains coolant flow optimization for warming up and cooling.

Water Pump/Thermostat Housing

Details the combined water pump and thermostat housing assembly.

Map-controlled Thermostat

Explains how the thermostat adjusts cooling based on operating conditions.

Cooling Module Components

Lists the main components within the cooling module.

Cooling Radiator and Expansion Tank

Describes the radiator construction and expansion tank function.

Heat Exchangers and Fans

Details oil/coolant exchanger, electric fan, and viscous fan.

Engine Block

Engine Block Components

Details the oil sump, crankcase, and cylinder walls.

Crankshaft and Bearings

Explains crankshaft material, bearings, and thrust bearing.

Pistons, Connecting Rods, and Flywheel

Describes pistons, connecting rods, and flywheel details.

Vibration Damper and Engine Mounting

Covers vibration damper and engine mounting systems.

Lubrication System

Oil Delivery and Control

Details oil jets, check valves, pressure switch, and pump.

Oil Pressure Regulation

Explains oil pressure control valve functions and stages.

Oil Filter and Cooling

Covers oil filter, pressure control, and oil cooling system.

Lubrication System Technical Data

Provides recommended oil and lubrication system specifications.

Review Questions