The 2.5-liter Ford HYDA or 2.5 Duratec ST225 engine was produced from 2005 to 2010 and was installed on a sports modification of the second generation of the Focus model with the ST index. This unit, in fact, was just a clone of the engine of the Volvo Modular engine family.
DURATEC ST/RS family:
2.0 L – ALDA, HMDA;
2.5 L – HUBA, HYDA, HYDB, HUWA, JZDA.
The engine was installed on:
- Ford Focus ST Mk2 in 2005 – 2010.
Specifications
| Production years | 2005-2010 |
| Displacement, cc | 2522 |
| Fuel system | distributed injection |
| Power output, hp | 225 |
| Torque output, Nm | 320 |
| Cylinder block | aluminum R5 |
| Block head | aluminum 20v |
| Cylinder bore, mm | 83 |
| Piston stroke, mm | 93.2 |
| Compression ratio | 9.0 |
| Features | intercooler |
| Hydraulic lifters | no |
| Timing drive | belt |
| Phase regulator | CVVT |
| Turbocharging | yes |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 5.75 |
| Fuel type | petrol |
| Euro standards | EURO 4 |
| Fuel consumption, L/100 km (for Ford Focus 2 ST 2009) — city — highway — combined |
13.8 6.8 9.3 |
| Engine lifespan, km | ~400 000 |
Disadvantages of the HYDA engine
- The most common concern here is the crankcase ventilation system, or rather the PCV valve;
- When the valve is dirty, the engine howls and oil presses through the camshaft seals;
- If grease regularly gets on the belt, its resource drops to 60 – 80 thousand km;
- Bad fuel quickly affects the condition of the candles, coils and fuel pump;
- The turbine runs differently for everyone, many change it on a run of 100 – 150 thousand km.