2005 BMW 545i engine oil

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Components
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
- Coolant Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
- Water Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
- Map-Controlled Thermostat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
- Cooling Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
- Radiator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
- Expansion Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
- Transmission Oil/Water Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . .44
- Electrically-Operated Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
- Viscous Coupling Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Engine block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
- Oil Sump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
- Crankcase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
- Crankshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
- Connecting Rods and Pistons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
- Flywheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
- Vibration Damper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Lubrication System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
- Oil Jets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
- Oil Check Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
- Oil Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
- Oil Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
- Pressure Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
- Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Review Questions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

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N62 Engine
N62 ENGINE
Model: E65 - 745i / E66 - 745Li
Engine: N62B44
Production Date: 11/2001 - E65, 01/2002 - E66
Objectives of The Module
After Completing this module, you will be able to:
• Describe the two stage oil supply.
• Distinguish the difference between the left and right drive chain tensioning assem-
blies.
• Explain the Bi-VANOS operation.
• Understand the function of the Variable intake manifold.
• Explain the cooling circuit flow.
• List what chamber A and chamber B is used for in the Bi-VANOS system.
• Identify the Secondary air components.
• Explain how the initial VANOS position is retained when oil pressure is not present.
• List the proper drive belt removal procedure.
• Describe the throttle valve functions.
• Identify the N62B44 designation.

Downloaded from www.Manualslib.com manuals search engine Crankcase Venting System
The crankcase vapors (a result of combustion blow-by gasses) are led out of the crank-
case and back into the combustion chamber via the intake manifold. The blow-by gasses
contain droplets of oil which must be separated. The oil is returned to the sump while the
blow-by gasses are led into the intake pipe for combustion.
The engine performance is affected by the introduction of crankcase vapors into the com-
bustion process, particularly in idle speed ranges. This influence is monitored by lambda
regulation.
The crankcase vapors are carried from the crankcase and into the cylinder head covers
through labyrinth separators (one per cylinder head). The oil which accumulates on the
walls of the labyrinth separators flows into the cylinder head via a siphon and from there
back to the sump.
The remaining vapors are passed to the engine for combustion via the pressure control
valve (5) in the intake manifold. One labyrinth separator with a pressure control valve is inte-
grated in each of the two cylinder head covers.
The throttle valve is controlled so that there is always a 50 mbar vacuum in the intake man-
ifold. The pressure control valve regulates the crankcase pressure to a low 0-30 mbar.
12
N62 Engine
43-02-12 Cylinder Head Cover
1-4. Opening for Spark Plugs
5. Pressure Control Valve
6. Opening Valvetronic Motor
7. Opening Valvetronic Sensor
Connector
8. Camshaft Sensor

Downloaded from www.Manualslib.com manuals search engine Cylinder Heads
The two N62 cylinder heads are a new development from BMW. They are fitted with the
Valvetronic system. The secondary air ducts for subsequent exhaust gas treatment are
integrated in the cylinder heads. The cylinder heads are cooled by the “cross-flow” princi-
ple.
The inlet camshaft and the Valvetronic eccentric shaft are jointly guided by a bridge sup-
port. The cylinder heads are made from aluminum and are manufactured using gravity die-
casting. The upper timing chain housing is now an integral part of the cylinder head.
20
N62 Engine
Cylinder Head
1. Cylinder Head for Cylinder Bank 1-4 7. Mounting VANOS Intake Solenoid
2. Cylinder Head for Cylinder Bank 5-8 8. Mounting VANOS Outlet Solenoid
3. Upper Timing Chain Guide with Oil Jet 9. Oil Pressure Switch
4. Mounting for VANOS Intake Solenoid 10. Chain Tensioner Mount
5. Mounting for VANOS Outlet Solenoid 11. Upper Timing Chain Guide with Oil Jet
6. Chain Tensioner Mount43-02-20

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Each cylinder head has a plastic cover for the ignition coil cabling and top of the cylinder
head. The covers “push fit” into rubber grommets on the cylinder head covers.
A sound absorption cover for the top of the
engine also covers the two Valvetronic motors.
This cover is fixed to the intake manifold hous-
ing using four bolts.
The cylinder head covers are made from plastic. The retaining sleeves for the ignition coils
have molded-on gaskets. The sleeves must be replaced if any hardening or damage is vis-
ible on the gaskets. The sleeves are inserted into the cylinder head through the cylinder
head cover (nos. 1through 4).
N No
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21
N62 Engine
42-02-21
Engine Covers
Cylinder Head Cover
1. Cylinder Head Top Cover
2. Sound Absorption Engine Cover
1-4. Opening for Spark Plugs
5. Pressure Control Valve
6. Opening for Valvetronic Motor
7. Opening for Valvetronic Sensor Connector
8. Camshaft Sensors (Intake and Exhaust)
43-02-12

Downloaded from www.Manualslib.com manuals search engine Cylinder Head Gaskets
The cylinder head gasket is a multi-layer steel
gasket with a rubber coating. This type of gas-
ket has previously been used on other engines.
The B44 head gasket has a 6 mm hole in a flap
on the outlet side of the cylinder head gasket.
The cylinder head bolts for the N62 engine are
M10x160 necked-down “stretch” bolts.
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The lower part of the timing chain housing is
bolted to the cylinder head using two M8x45
bolts.
Camshafts
The camshafts are made from chilled cast iron
and are hollowed to reduce weight. The cam-
shafts are weighted with counterbalances for
equalizing imbalances in the valve gear.
1. Camshaft sensor wheels (sintered metal)
2. Thrust bearing area with oil ducts for the
VANOS units
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22
N62 Engine
42-02-23
42-02-22
42-02-24

Downloaded from www.Manualslib.com manuals search engine 29
N62 Engine
Bi-VANOS (Variable Camshaft Adjustment)
The N62 features compact infinitely variable vane-type VANOS for the intake and exhaust
camshafts. The VANOS unit is easy to remove and install. The VANOS unit is designed as
an integral component of the chain drive and is secured to the respective camshaft with a
central bolt. The camshaft adjustment rate is 60º (as compared with the crankshaft).
The VANOS unit gear teeth are visibly different to match the new toothed chain. The
VANOS unit for the cylinders 1-4 exhaust shaft has mounting provisions for the vacuum
pump drive. A spring plate is fitted between the VANOS unit and the vacuum pump drive
to reduce wear (3). The V VA
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for intake and exhaust installa-
tion positions.
The VANOS units are supplied with oil via ports in the camshafts. The oil ports are located
on the left and right of the thrust bearing. Depending on the individual VANOS adjustment
direction, the VANOS is supplied with oil via either the rear oil ports (1 & 2) or the front oil
ports (3 & 4). The oil moves through the camshaft to the VANOS units.
VANOS Units
1. VANOS Unit Exhaust Side
2. VANOS Central Bolt
3. Spring Plate
4. VANOS Unit Intake Side
5. Toothed Chain Gear Teeth
VANOS Oil Ports
1&2. Rear Oil Duct with Four Holes
3&4. Front Oil Duct with Four Holes
5. Front Oil Duct Outlets
6&7. Hook Sealing Washer.43-02-39

Downloaded from www.Manualslib.com manuals search engine 30
N62 Engine
Camshaft Sensors
The cam shaft sensors (Hall effect) are mounted through the cylinder head cover. There are
two sensors per cylinder head to monitor the intake and exhaust camshaft positions.
The sensors monitor the impulse wheels
attached to the ends of the camshafts.
Solenoid Valves
The VANOS solenoid valves are mounted through the upper timing case front cover. There
are two solenoids per cylinder head to control the oil flow to the camshaft ports for the
intake and exhaust VANOS units.
The 4/3 way proportional solenoid valve is acti-
vated by the ECM to direct oil flow. The sole-
noid valve is sealed to the front cover by a radi-
al seal and secured by a retaining plate.
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42-02-48 Camshaft Sensors
1. Valvetronic Position Sensor
2. Intake Camshaft Position Sensor
3. Exhaust Camshaft Position Sensor
42-02-42