The 4.2-liter V8 diesel Porsche MCU.DC was produced from 2014 to 2018 for the facelifted second-generation Cayenne S Diesel. It is an updated version of the MCU.DB from the EA898 family and produces 385 hp and 850 Nm.
Porsche diesel family: M05.9E, MCT.BA, MCR.CC, MCU.DB, M05.9D, MCD.UD, MCR.CA, MCT.BB, MCT.BC, MCV.VA, MCW.JA, MDB.UC, MCU.DC.
Specifications
| Production years | 2014-2018 |
| Displacement, cc | 4134 |
| Fuel system | Common Rail |
| Power output, hp | 385 |
| Torque output, Nm | 850 |
| Cylinder block | cast iron V8 |
| Block head | aluminum 32v |
| Cylinder bore, mm | 83 |
| Piston stroke, mm | 95.5 |
| Compression ratio | 16.5 |
| Features | intercooler |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | no |
| Turbocharging | GTB1749VK + GTB1749VZ |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 9.4 |
| Fuel type | diesel |
| Euro standards | EURO 5 / 6 |
| Fuel consumption, L/100 km (for Porsche Cayenne S Diesel 2015) — city — highway — combined |
10.3 7.2 8.2 |
| Engine lifespan, km | ~400 000 |
| Weight, kg | 255 |
The engine was installed on:
- Porsche Cayenne 2 (92A) in 2014 – 2018.
Disadvantages of the Porsche MCU.DC engine
- A reliable diesel, but the fuel system with piezo injectors is demanding on fuel quality;
- There are reports of turbochargers being replaced before 100,000 km;
- Oil and coolant leaks are common;
- After 250,000 km the timing chains may stretch, and replacing them is very expensive;
- Other problems are related to fouling of the intake, particulate filter and EGR valve.
Frequently asked questions about the Porsche MCU.DC
How much power does the Porsche MCU.DC make?
The Porsche MCU.DC develops 385 hp and 850 Nm of torque.
How much oil does the Porsche MCU.DC take and which one?
Engine oil capacity: 9.4 liters. Recommended oil: 5W-30.
Does the Porsche MCU.DC have a timing belt or chain?
The Porsche MCU.DC uses a timing chain.
Is the Porsche MCU.DC turbocharged?
Yes, the Porsche MCU.DC is turbocharged (GTB1749VK + GTB1749VZ).
Does the Porsche MCU.DC need valve clearance adjustment?
No, the Porsche MCU.DC has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Porsche MCU.DC last?
The typical lifespan of the Porsche MCU.DC is ~400 000 km with proper maintenance.
What is the fuel consumption of the Porsche MCU.DC?
Porsche Cayenne S Diesel 2015: city 10.3, highway 7.2, combined 8.2 L/100 km.
What cars was the Porsche MCU.DC installed on?
Porsche Cayenne 2 (92A) in 2014 - 2018.
What are the common problems of the Porsche MCU.DC?
A reliable diesel, but the fuel system with piezo injectors is demanding on fuel quality. There are reports of turbochargers being replaced before 100,000 km. All known problems.
