From 2002 to 2007, the German company assembled the 4.5-liter Porsche M48.50 turbo engine and installed it in the back of the 955’s pre-styled first-generation Cayenne crossovers. Because of the inadequate Alusil coating, this engine is well known for the frequent development of scuffing in the cylinders.
M48-line engines: M48.00, M48.50, M48.01, M48.51, and 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 development of scoring in the cylinders is this turboset’s primary issue;
The most common causes are driving on a cold engine and using poor fuel or oil;
The hot part of the turbines can crack up to 100,000 kilometers during extremely active operation; ignition coils, starters, thermostats, and pumps are also weak points. Antifreeze leaks frequently result from burst pipes and expansion tanks.