The Most Common 4.5 Porsche M48.00 Engine Problems

The 4.5-liter Porsche M48.00 gasoline engine was produced by the company from 2002 to 2007 and was installed on the Cayenne crossover in the back of the 955 or the pre-styling version of the first generation.

Such an internal combustion engine is known for the frequent formation of scoring in the cylinders due to the weak coating of Lokasil.

M48.00 Engine Specifications

Exact Volume4511 cm³
Supply systemDistribution injection
ICE power340 HP
Torque420 Nm
Cylinder blockAluminum V8
Block headAluminum 32v
Cylinder diameter93 mm
Piston stroke83 mm
Compression ratio11.5
ICE featuresVarioRam
Hydraulic liftersYes
Timing driveChain
Phase regulatorOn the intake shafts
What oil to pour8.5 liters 5W-40
Fuel typeAI-98
Environmental classEURO 4
Sample resource220,000 km

Fuel Consumption Engine Porsche M48.00

Using the example of a 2005 Porsche Cayenne with automatic transmission:

City20.9 liters
track11.2 liters
Mixed14.9 liters

Reliability and main advantages Of The M48.00 engine

The working volume of the M48.00 engine is 4511 cm3. At the same time, it is capable of developing a power of 340 hp. and accelerate to 242 km / h.

It should also be noted that the M48 has a V-shaped structure, it has 8 cylinders and 32 valves. Plus, this engine has a compression ratio of 11.5: 1 and five main bearings.

It is important to mention that the engine has phase regulators, a gas distribution mechanism with two camshafts (DOHC) and a distributed injection system. And as a timing drive, a fairly reliable two-row chain is used here.

Read Also: The Most Common 3.6 Porsche M96.03 Engine Problems

Disadvantages and problems of the M48.00 engine

The main problem with the M48.00 engine is bullying. Moreover, it is almost impossible to identify this problem by ear in the early stages. To do this, you need to carry out the so-called endoscopy.

If you do not react in any way to the appearance of scoring in the cylinder, then soon scoring may also appear on the pistons, and in the end they will have to be replaced with new ones (and this is quite an expensive pleasure).

Also, this engine may suffer from an oil burner. Often this is due to the use of bad oil, but there may be other reasons.

Be that as it may, if the internal combustion engine consumes more than one liter per 1000 km, this is a cause for concern. In such a situation, it will definitely not be superfluous to take the engine for diagnostics.

And the M48.00 engine may start to overheat at some point. As a rule, this is due to some kind of malfunction of the cooling circuit (for example, pipes may burst here, through which antifreeze flows).

M48.00 engine applicability

  • Porsche : Cayenne S (2002-2007)

M48.00 engine Tuning prospects

As part of their work, tuning masters can make significant adjustments to the electronic control engine of the M48.00 engine – adjust fuel injection and ignition timing, disable catalyst status sensors, lower oxygen sensors, etc.

In this way, it is quite possible to increase the power of the M48.00 from 340 to 362 hp, and the torque from 420 to 447 Nm.

And when ordering a more complex Stage 2 tuning, you can get a power of 380 hp at the output. and a torque of 460 Nm.

And the motorist will undoubtedly be able to feel these changes during the trip – the driving experience will be different, not the same as before visiting the tuning workshop.

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