Mitsubishi 6G74 engine characteristics
| Parameter | Value |
|---|---|
| Manufacturing | Kyoto Engine Plant |
| Engine make | 6G7/Cyclone V6 |
| Years of production | 1992-2019 |
| Cylinder block material | cast iron |
| Power system | injector |
| Type | V-type |
| Number of cylinders | 6 |
| Valves per cylinder | 4 |
| Piston stroke, mm | 85.8 |
| Cylinder diameter, mm | 93 |
| Compression ratio | |
| 9.5 (SOHC) | |
| 10 (DOHC) | |
| 10.4 (DOHC GDI) | |
| Engine displacement, cc | 3497 |
| Engine power, hp/rpm | |
| 186-222/4750-5200 (SOHC) | |
| 208-265/5500-6000 (DOHC) | |
| 202-245/5000-5500 (DOHC GDI) | |
| Torque, Nm/rpm | |
| 303-317/4500-4750 (SOHC) | |
| 300-348/3000 (DOHC) | |
| 318-343/4000 (DOHC GDI) | |
| Fuel | 95-98 |
| Environmental regulations | – |
| Motor weight, kg | ~230 |
| Fuel consumption, l/100 km | |
| – city | 17.0 |
| – highway | 10.5 |
| – mixed | 12.8 |
| Oil consumption, gr./1000 km | to 1000 |
| Engine oil | 0W-40 |
| 5W-30 | |
| 5W-40 | |
| 5W-50 | |
| 10W-30 | |
| 10W-40 | |
| 10W-50 | |
| 10W-60 | |
| 15W-50 | |
| How much oil in the engine, liters | 4.9 |
| Oil change is carried out, km | 7000-10000 |
| Engine operating temperature, deg. | 90-95 |
| Engine life, thousand kilometers | |
| – according to the plant | – |
| – in practice | 400+ |
| Tuning, hp | |
| -potential | 1000+ |
| – without loss of resource | – |
| Motor installed | Mitsubishi L200/Triton |
| Mitsubishi Pajero/Montero | |
| Mitsubishi Pajero Sport/Challenger | |
| Mitsubishi Debonair | |
| Mitsubishi Diamante | |
| Mitsubishi Magna/Verada |
Reliability, problems and repair of Mitsubishi 6G74 3.5L engine
Mitsubishi 6G7The 6G74, a major representative of the Cyclone V6 family (which included the 6G71, 6G72, 6G73 and 6G75), was developed on the basis of the 6G72 and was released in 1992. The cylinder block of the new engine was finalized for the use of a crankshaft with a stroke of 85.8 mm, the cylinder diameter was increased from 91.1 mm to 93 mm. There were various cylinder heads, all with hydrocompensators. The simplest SOHC 24V, compression ratio here is 9.5, power from 180 to 222 hp. 6G74 SOHC can be found on the following cars: Mitsubishi Triton/L200, Pajero Sport, Pajero 2/3/4, Montero, Magna/Verada.
The next type of cylinder head on the 6G74 was DOHC, compression ratio increased to 10. Power 208-230 hp. Versions with the system of changing the valve timing and valve lift height MIVEC are more powerful – 260-264 hp. These engines were used in Mitsubishi Debonair, Diamante, Pajero 2. Mitsubishi Pajero Evolution has been developed on the basis of this engine, the power of which is 280 hp.
The last variation is a DOHC 24V GDI, with a direct fuel injection system. Compression ratio is increased to 10.4, power from 220 to 245 hp. This motor was used in Mitsubishi Pajero 3, Challenger.
The timing is driven by a belt, replacement of the timing belt on the 6G74 is mandatory every 90 thousand kilometers. Together with it we change the roller and pump.
Since 2003, the 6G74 was leisurely replaced by a more powerful and voluminous 6G75. In 2019, the production of 6G74 was completed and today its place is taken by 6B31.
Problems and disadvantages of Mitsubishi 6G74 3.5-liter engines
The disadvantages of the 3.5-liter engine are similar to those of the 6G72, you can learn about them by clicking here. Additionally there is an issue with GDI. If your 6G74 is stalling, then it’s worth cleaning the fuel injector filters and idle valve.