Audi AEB Specifications
| Engine Model: Audi AEB |
| Engine Type: 4-cycle 4-cylinder DOHC 20-valve VVT turbocharged liquid-cooled gasoline |
| Total Displacement: 108.7 cu.in (1.78 L) |
| Rated Engine Power: 150 Hp (110 kW) at 5700 rpm |
| Fuel System Type: Direct fuel injection (Fuel Stratified Injection - FSI) |
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The Audi AEB is a 1.8-liter, four-cylinder,
turbocharged gasoline engine, belonging to the first generation of the
Volkswagen Group's EA113 engine family. This engine represents a pivotal
advancement, being the first mass-production turbocharged direct
injection (TFSI) engine offered by Audi. It introduced the revolutionary
Fuel Stratified Injection (FSI) system to the market in 2000, utilizing
a high-pressure fuel pump and direct injectors to spray fuel directly
into the combustion chamber for improved efficiency and power.
The AEB engine is characterized by its robust cast-iron block, aluminum
cylinder head with five valves per cylinder, and a relatively small K03
turbocharger. It delivers smooth power with minimal turbo lag, but its
pioneering direct injection system brought new maintenance challenges,
most notably severe carbon deposit buildup on intake valves due to the
absence of fuel wash over the ports. The AEB is a historically
significant engine that laid the groundwork for all subsequent
Volkswagen Group TFSI and TSI powerplants.
Engine Type: Inline-4 cylinder, liquid-cooled, turbocharged and
intercooled, gasoline direct injection (FSI). Displacement: 1781 cc
(1.781 L) / 108.7 cu.in.
Bore x Stroke: 81.0 mm x 86.4 mm / 3.19 in x 3.40 in.
Compression Ratio: 11.5:1 (high for a turbocharged engine of the era).
Firing Order: 1-3-4-2.
Direction of Rotation: Clockwise (viewed from the front/flywheel end).
Maximum Power Output: 110 kW (150 hp) at 5700 rpm.
Maximum Torque Output: 210 Nm (155 lb-ft) at 1750-4600 rpm.
Fuel Requirement: Premium unleaded gasoline, minimum 95 RON (91 AKI). 98
RON (93 AKI) is recommended. Emission Standards Compliance: Euro 3.
Material: Cast iron. This material provides high strength and
durability, forming a solid foundation for the high-compression,
turbocharged design.
Construction: Deep-skirt design with an integrated upper crankcase. The
block features four main bearing supports. The main bearing caps are not
cross-bolted.
Crankshaft: Cast nodular iron crankshaft. Main bearing journal diameter:
54.0 mm / 2.126 in. Crankpin journal diameter: 45.0 mm / 1.772 in.
Pistons: Aluminum alloy pistons with a specially shaped, shallow
combustion bowl in the crown, optimized for the direct injection spray
pattern and high compression ratio.
Connecting Rods: Forged steel connecting rods.
Material: Aluminum alloy.
Head Construction: Dual overhead camshafts (DOHC), 20-valve design (5
valves per cylinder: 3 intake, 2 exhaust). The camshafts are driven by a
single timing belt.
Valve Arrangement: The valves are arranged in a compact pent-roof
combustion chamber. They are actuated via bucket tappets with shims for
valve clearance adjustment. This is an interference engine.
Variable Valve Timing: The intake camshaft is equipped with a vane-type
adjuster (VVT) for variable valve timing. Valve Diameters: Intake
(small): 26.0 mm / 1.024 in. Intake (large): 29.5 mm / 1.161 in.
Exhaust: 30.5 mm / 1.201 in.
Injection Type: Direct fuel injection (Fuel Stratified Injection - FSI).
Fuel is injected at high pressure directly into the combustion chamber.
Engine Management: Bosch Motronic ME7.1. This system integrates control
of direct injection, ignition timing, turbocharger boost, and variable
valve timing.
Fuel Delivery: A camshaft-driven, single-piston high-pressure fuel pump
(HPFP) mounted on the cylinder head generates system pressure up to 120
bar. An in-tank electric lift pump supplies the HPFP. Fuel Rail and
Injectors: Common rail system with solenoid-controlled, side-mounted
direct injectors. Turbocharger: KKK K03 turbocharger with an integral
wastegate.
Intercooler: Air-to-air intercooler.
Throttle Body: Electronically controlled (drive-by-wire) throttle body.
Type: Pressure-fed, full-flow filtration with a gear-type oil pump.
Oil Pump: Gear-type pump, driven by the crankshaft.
Oil Filter: Cartridge-type, mounted on the front of the engine block.
Oil Cooler: Not installed on this engine variant.
Oil Capacity (including filter): 4.3 L / 4.5 US qt.
Recommended Oil Grade: Full synthetic engine oil meeting VW oil standard
502 00. Viscosity: 5W-40 or 0W-40. Operating Oil Pressure: 2.0 bar at
hot idle, 3.5 - 4.5 bar at 2000 rpm. Imperial: 29 psi (idle), 51 - 65
psi (2000 rpm).
Type: Pressurized, dual-circuit system. A small auxiliary electric
coolant pump operates after engine shutdown to cool the turbocharger and
prevent heat soak.
Water Pump: Centrifugal pump, driven by the timing belt.
Thermostat: Wax pellet type, opening temperature 87°C (189°F).
Coolant Capacity: 6.5 L / 6.9 US qt (entire system).
Coolant Type: VW G12 (pink) or G12++ ethylene glycol-based antifreeze.
Electrical System: 12-volt negative ground. 120-amp alternator.
Ignition System: Coil-on-plug (COP) individual ignition coils.
Engine Management: Bosch Motronic ME7.1 as stated. The system uses a
hot-film mass air flow (MAF) sensor and two knock sensors.
Crankcase Ventilation: A conventional Positive Crankcase Ventilation
(PCV) system.
Overall Length: 520 mm / 20.5 in.
Overall Width: 650 mm / 25.6 in.
Overall Height: 620 mm / 24.4 in.
Dry Weight: 125 kg / 276 lbs.
Engine Oil Change Interval: Every 15,000 km or 12 months. Severe service
intervals are 7,500 km or 6 months. Imperial: 9,300 miles / 4,700 miles.
Oil Filter Change: Every oil change. Fuel Filter Change: Integrated with
the in-tank fuel pump assembly; considered a lifetime component but may
require replacement at high mileage (e.g., 120,000 km / 75,000 miles).
Air Filter Change: Every 60,000 km (37,300 miles) or as inspected.
Timing Belt Replacement: This is an interference engine. Replace the
timing belt, tensioner, and idler rollers every 60,000 km (37,300 miles)
or 5 years. The water pump should be replaced concurrently. Spark Plug
Replacement: Specified long-life platinum spark plugs every 60,000 km
(37,300 miles). Carbon Cleaning: An unavoidable and defining maintenance
requirement.
Walnut shell blasting of the intake ports and valves is necessary every
80,000 - 100,000 km (50,000 - 62,000 miles) to remove severe carbon
deposits caused by direct injection. High-Pressure Fuel Pump Cam
Follower: A critical wear item. The roller follower on the HPFP must be
inspected every 30,000 km (18,600 miles) and replaced if worn to prevent
catastrophic failure.
Cylinder Head Bolts: Torque-to-yield (TTY) bolts. Tighten in sequence:
Step 1: 40 Nm (30 lb-ft). Step 2: +90° turn. Step 3: Final +90° turn.
These bolts are single-use.
Main Bearing Cap Bolts: 65 Nm (48 lb-ft) + 90° turn.
Connecting Rod Cap Bolts: 30 Nm (22 lb-ft) + 90° turn (replace bolts).
Spark Plugs: 30 Nm (22 lb-ft).
Oil Drain Plug: 30 Nm (22 lb-ft).
Camshaft Adjuster (phaser) Bolt: 50 Nm (37 lb-ft) + 90° turn
(one-time-use bolt).
High-Pressure Fuel Pump Mounting Bolts: 25 Nm (18 lb-ft).
Wheel Bolts: 120 Nm (89 lb-ft).
The Audi AEB 1.8T FSI engine was used in a limited number of Audi models
during the early 2000s as the pioneering application of this technology.
Audi A4 (B6, 2001-2005): A4 1.8T FSI (specific model years and markets,
primarily Europe). Audi A3 (8L, 2003-2004): A3 1.8T FSI (specific to
later 8L models before the switch to the EA113 2.0T FSI). The AEB code
is specific to this early 1.8T FSI unit. It was not widely used in North
American market vehicles, which largely received the port-injected 1.8T
(AMB, AWV, etc.) during this period. Production was limited as the
technology was quickly succeeded by the 2.0T FSI (BPY, etc.).
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