The 2.5-liter diesel engine Volkswagen BDH 2.5 TDI was produced from 2004 to 2006 and was installed on the Passat B5, as well as such Audi models as the A6 C5 and the convertible based on the A4 B6. This power unit is essentially an updated version of the famous BAU engine to EURO 4.
EA330 family: AFB, AKE, AKN, AYM, BAU, BDG, BDH.
Specifications
| Production years | 2004-2006 |
| Displacement, cc | 2496 |
| Fuel system | direct injection |
| Power output, hp | 180 |
| Torque output, Nm | 370 |
| Cylinder block | cast iron V6 |
| Block head | aluminum 24v |
| Cylinder bore, mm | 78.3 |
| Piston stroke, mm | 86.4 |
| Compression ratio | 18.5 |
| Features | 2 x DOHC |
| Hydraulic lifters | yes |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | VGT |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 6.0 |
| Fuel type | diesel |
| Euro standards | EURO 4 |
| Fuel consumption, L/100 km (for Volkswagen Passat 4WD 2005) — city — highway — combined |
10.6 5.9 7.6 |
| Engine lifespan, km | ~320 000 |
The engine was installed on:
- Audi A4 B6 Cabrio in 2004 – 2006;
- Audi A6 C5 (4B) in 2004 – 2005;
- Volkswagen Passat B5 (3B) in 2004 – 2005.
Disadvantages of the VW BDH engine
- Most of the problems for owners are caused by malfunctions in the capricious VP44 injection pump;
- Updated hollow camshafts often burst on runs of 150 – 250 thousand km;
- Also, grease constantly oozes from the joints of the motor and from under the valve covers;
- In the turbine, the geometry mechanism often wedges, the viscous coupling bearing does not last long;
- From low-quality oils, hydraulic lifters and pressure reducing valves can seize.
Frequently asked questions about the Volkswagen BDH
How much power does the Volkswagen BDH make?
The Volkswagen BDH develops 180 hp and 370 Nm of torque.
How much oil does the Volkswagen BDH take and which one?
Engine oil capacity: 6.0 liters. Recommended oil: 5W-30.
Does the Volkswagen BDH have a timing belt or chain?
The Volkswagen BDH uses a timing belt.
Is the Volkswagen BDH turbocharged?
Yes, the Volkswagen BDH is turbocharged (VGT).
Does the Volkswagen BDH need valve clearance adjustment?
No, the Volkswagen BDH has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Volkswagen BDH last?
The typical lifespan of the Volkswagen BDH is ~320 000 km with proper maintenance.
What is the fuel consumption of the Volkswagen BDH?
Volkswagen Passat 4WD 2005: city 10.6, highway 5.9, combined 7.6 L/100 km.
What cars was the Volkswagen BDH installed on?
Audi A4 B6 Cabrio in 2004 - 2006; Audi A6 C5 (4B) in 2004 - 2005; Volkswagen Passat B5 (3B) in 2004 - 2005.
What are the common problems of the Volkswagen BDH?
Most of the problems for owners are caused by malfunctions in the capricious VP44 injection pump. Updated hollow camshafts often burst on runs of 150 - 250 thousand km. All known problems.
