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, HUWA, HYDA, HYDB, JZDA.
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 |
| Weight, kg | 175 |
The engine was installed on:
- Ford Focus ST Mk2 in 2005 – 2010.
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.
Frequently asked questions about the Ford HYDA
How much power does the Ford HYDA make?
The Ford HYDA develops 225 hp and 320 Nm of torque.
How much oil does the Ford HYDA take and which one?
Engine oil capacity: 5.75 liters. Recommended oil: 5W-30.
Does the Ford HYDA have a timing belt or chain?
The Ford HYDA uses a timing belt.
Is the Ford HYDA turbocharged?
Yes, the Ford HYDA is turbocharged.
Does the Ford HYDA need valve clearance adjustment?
Yes, there are no hydraulic lifters, so the valve clearances have to be checked and adjusted periodically.
How long does the Ford HYDA last?
The typical lifespan of the Ford HYDA is ~400 000 km with proper maintenance.
What is the fuel consumption of the Ford HYDA?
Ford Focus 2 ST 2009: city 13.8, highway 6.8, combined 9.3 L/100 km.
What cars was the Ford HYDA installed on?
Ford Focus ST Mk2 in 2005 - 2010.
What are the common problems of the Ford HYDA?
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. All known problems.
