Mazda 2.5T SkyActiv-G Turbo Engine Specs, Problems, Reliability. The SkyActiv-G 2.5 T is a 2.5-liter direct-injection turbocharged gasoline engine. It is the first turbocharged unit of the Skyactiv-G engine series which powers Mazda’s midsize crossover SUV CX-9 and sedan Mazda6.
The engine based upon naturally aspirated SkyActiv-G 2.5 engine. There are the same bore and stroke, but the compression ratio is lower – 10.5:1. The SkyActiv-G 2.5 shares lots of parts with turbo version: the crankshaft, balancing shafts, the fuel pump, fuel injection system, oil pump, and so on.
The supercharged system is fascinating with 2 brand-new systems. The first is the Dynamic Pressure Turbo system, imitating the operation of a turbine with variable geometry. At low engine speeds (below 1620 rpm), the exhaust gas streams through narrow channels. That maximizes the energy of each exhaust pulse to acquire a high turbine driving force. The additional valves open at the higher RPMs, sending out gases to the impeller like a traditional turbocharger.
This system permits the engine to have exceptional, powerful and linear velocity in the low- to the mid-rpm variety without turbo lag. The 2nd technology is the recirculation of the cooled exhaust gases EGR, which enabled decreasing the temperature of gases from 500 to 100 degrees Celsius. With the cooled recirculation gases, it became possible to raise the compression ratio to 10.5, which is really high for turbocharged engines.
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SkyActiv-G 2.5 T Engine Problems and Reliability
The brand-new Mazda 2.5-liter SkyActiv turbo engine is a relatively new engine, and there are no huge reports. Beginning with the reality that the engine is based on SkyActiv-G 2.5 and shares numerous SkyActiv technologies, we can assume that there will be no major problems with it. The all previous engines of that series are referred to as excellent and trusted engines with low fuel intake and high performance.
you must see more engine detail in here: Engine – US Cars News or you can see on wiki here
Mazda 2.5T SkyActiv-G Turbo Engine Specs
| Manufacturer | Mazda; Hiroshima, Japan |
| Production years | 2016-present day |
| Cylinder block material | Aluminum |
| Cylinder head material | Aluminum |
| Fuel type | Gasoline |
| Fuel system | Direct fuel injection |
| Configuration | Inline |
| Number of cylinders | 4 |
| Valves per cylinder | 4 |
| Valvetrain layout | DOHC |
| Bore, mm | 89.0 (3.50 in) |
| Stroke, mm | 100.0 (3.94 in) |
| Displacement, cc | 2,488 cc (151.8 cu in) |
| Type of internal combustion engine | Four-stroke, turbocharged |
| Compression Ratio | 10.5:1 |
| Power, hp | 227 hp (169kW)/ 5,000 – regular gasoline 250 hp (186kW)/ 5,000 – premium gasoline |
| Torque, lb ft | 310 lb-ft (420 Nm)/ 2,000 |
| Engine weight | – |
| Firing order | 1-3-4-2 |
| Engine oil weight | SAE 0W-30, 5W-30 |
| Engine oil capacity, liter | 4.8 (5.07 us quarts) – service change; 5.9 (6.23 us quarts) – dry; 0.2 (0.211 us quarts) – oil filter |
| Oil change interval, mile | 12,000 (20,000 km)/12 months |
| Applications | Mazda CX-9, Mazda6 |
