03_E85_M54_Engine.pdf

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Table of Contents
E85 M54 Engine
Subject
Page
Purpose of the System .......................................................................... 3
Technical Data.........................................................................................3
Power Output and Torque Characteristics............................................... 4
System Components ..............................................................................5
Cooling System.......................................................................................5
Exhaust System...................................................................................... 8
Secondary Air System.............................................................................9
Fresh Air System....................................................................................10
Motor Sound System.............................................................................10
Suction Jet Pump..................................................................................12
Ancillary Components and Belt Drive.....................................................12
Review Questions .................................................................................13
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E85 M54 Engine
Model: E85
Production: Start of Production MY 2003
Objectives:
After completion of this module you will be able to:
• Identify the changes on the M54 Engine as applied to the E85.
• Understand the E85 cooling system operation.
• Remove and Install Electric fan.
• Explain the Motor Sound System (MSS).
E85 M54 Engine
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E85 M54 Engine
Purpose of the System
To provide the “sporty” power, the E85 is equipped with either the M54B25 or M54B30
engine. The M54 engine is adapted for use in the E85 and the changes include:
• Engine peripherals:
- Cooling system
- Exhaust system
- Secondary air system
- Fresh air system
- Ancillary components and belt drive
• MS45 Engine Management System
• Fuel system
kt-10146
Technical Data
M54B25
M54B30
Design
6-cylinder/in-line engine
6-cylinder/in-line engine
Displacement - cm
2494
2979
3
Bore/stroke - mm
84 x 75
84 x 89.6
Power output - kW/HP
at engine speed (rpm)
141/191
6000
170/231
5900
Torque - Nm
at engine speed (rpm)
245
3500
300
3500
Idling speed - rpm
Cut-off speed - rpm
700
6500
700
6500
Compression ratio
10.5:1
10.2:1
Valves per cylinder
4
4
Knock control
yes
yes
Digital Motor Electronics
Siemens MS45.0
Siemens MS45.0
Emission Compliance
LEV
ULEV
Firing order
1 5 3 6 2 4
1 5 3 6 2 4
3
E85 M54 Engine
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Power Output and Torque Characteristics
45-03-02
1 M54B30 torque curve 3 M54B25 torque curve
2 M54B30 power output curve 4 M54B25 power output curve
E85 M54 Engine
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System Components
Cooling System
The E85 cooling system is similar to the E46 with the exception of the following changes:
• Cooling module (viscous fan eliminated)
• Air-controlled IHKA system (water valves eliminated)
• Use of Electric Power Steering (power steering cooler eliminated)
45-03-20
1. Coolant expansion/reservoir tank
10. Water pump
2. Bleed screw
11. Automatic transmission (if equipped)
heat exchanger
3. Radiator cap
12. Automatic transmission (if equipped)
thermostat cartridge
4. Map-controlled thermostat
13. Coolant level sensor
5. Ventilation port
14. Coolant level sensor float
6. Engine flow through (to cylinder)
15. A/C condenser
7. Supply to heater core
16. Low-temperature area (partition)
8. Heater core
17. Main coolant area
9. Return from heater core
18. Radiator
5
E85 M54 Engine
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