The 3.4-liter boxer Porsche M97.21 engine was produced by the concern from 2005 to 2009 and was installed on advanced modifications of the Cayman S coupe or Boxster S cabriolet in the back of 987. There was a slightly more powerful version of this power unit under its M97.22 index.
Engines of M97-line: M97.20, M97.21.
|Fuel system||distributed injection|
|Power output, hp||295|
|Torque output, Nm||340|
|Cylinder block||aluminum H6|
|Block head||aluminum 24v|
|Cylinder bore, mm||96|
|Piston stroke, mm||78|
|Phase regulator||VarioCam Plus|
|Recommended engine oil||5W-40|
|Engine oil capacity, liter||7.75|
|Euro standards||EURO 4|
|Fuel consumption, L/100 km (for Porsche Cayman S 2008)
|Engine lifespan, km||~240 000|
The engine was installed on:
- Porsche Boxster 2 (987) in 2006 – 2009;
- Porsche Cayman 1 (987) in 2005 – 2009.
Disadvantages of the Porsche M97.21 engine
- The most famous problem of the M97 family of units is seizures in the cylinders;
- These motors did not escape the massive problem with the intermediate shaft bearing;
- Also, there are very high requirements for lubrication and often turns the liners;
- By a run of 150,000 km, it usually requires replacing the timing chain;
- The weak point of the engine is its cooling system and in particular the water pump.