The German company assembled the 4.5-liter Porsche M48.50 turbo engine from 2002 to 2007 and put it on the pre-styling version of the first generation Cayenne crossovers in the back of the 955. This engine is famous for the frequent formation of scuffing in the cylinders due to the poor Alusil coating.
Engines of M48-line: M48.00, M48.50, M48.01, M48.51, M48.70.
Specifications
| Production years | 2002-2007 |
| Displacement, cc | 4511 |
| Fuel system | distributed injection |
| Power output, hp | 450 – 520 |
| Torque output, Nm | 620 – 720 |
| Cylinder block | aluminum V8 |
| Block head | aluminum 32v |
| Cylinder bore, mm | 93 |
| Piston stroke, mm | 83 |
| Compression ratio | 9.5 |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | on the intake shafts |
| Turbocharging | IHI RHF5H |
| Recommended engine oil | 5W-40 |
| Engine oil capacity, liter | 8.5 |
| Fuel type | petrol |
| Euro standards | EURO 4 |
| Fuel consumption, L/100 km (for Porsche Cayenne Turbo 2004) — city — highway — combined |
21.9 11.9 15.7 |
| Engine lifespan, km | ~200 000 |
| Weight, kg | 253 |
The engine was installed on:
- Porsche Cayenne 1 (9PA) in 2002 – 2007.
Disadvantages of the Porsche M48.50 engine
- The main problem with this turboset is the formation of scoring in the cylinders;
- Most often, bad fuel or oil is to blame, as well as driving on a cold engine;
- Antifreeze leaks often occur due to burst pipes and expansion tank;
- With very active operation, the hot part of the turbines can crack up to 100,000 km;
- Weaknesses here also include ignition coils, starter, thermostat and pump.
