The 3.7-liter V8 Audi BFL engine was produced at the concern’s enterprises from 2002 to 2006 and was installed only on the pre-restyling modification of the A8 executive sedan in the D3 body. This engine was distinguished from its predecessor by the presence of new cylinder heads with 5 valves per cylinder.
The EA824 series includes: AEW, ABZ, BFL, BFM, AXQ, BVJ, CDRA, BAR, CRDB, CEUA.
Specifications
| Production years | 2002-2006 |
| Displacement, cc | 3697 |
| Fuel system | distributed injection |
| Power output, hp | 280 |
| Torque output, Nm | 350 |
| Cylinder block | aluminum V8 |
| Block head | aluminum 40v |
| Cylinder bore, mm | 84.5 |
| Piston stroke, mm | 82.4 |
| Compression ratio | 11.0 |
| Features | 5V |
| Hydraulic lifters | yes |
| Timing drive | belt & 2 chains |
| Phase regulator | yes |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 7.5 |
| Fuel type | petrol |
| Euro standards | EURO 4 |
| Fuel consumption, L/100 km (for Audi A8 3.7 quattro 2004) — city — highway — combined |
17.1 8.6 11.8 |
| Engine lifespan, km | ~300 000 |
| Weight, kg | 197 |
The engine was installed on:
- Audi A8 D3 (4E) in 2002 – 2006.
Disadvantages of the Audi BFL engine
- This is a reliable and very durable power unit, but only with proper care;
- Bad fuel and overheating cause scuffing in the cylinders, because there are no liners there;
- It is very important to monitor the condition of the timing belt, since if it breaks, the valves bend;
- Camshaft gears and hydraulic chain tensioners have a low service life;
- And the plastic rods of the dampers in the intake manifold regularly break off;
- Weak points also include the crankshaft rear oil seal and the crankcase ventilation valve membrane.
