Mitsubishi 4G92 engine characteristics
| Parameter | Value |
|---|---|
| Manufacturing | Kyoto engine plant |
| Engine make | 4G9 |
| Years of manufacture | 1991-2005 |
| Cylinder block material | cast iron |
| Power system | Carburetor, injector |
| Type | row |
| Number of cylinders | 4 |
| Valves per cylinder | 4 |
| Piston stroke, mm | 77.5 |
| Cylinder diameter, mm | 81 |
| Compression ratio | 10.0, 11.0 |
| Engine displacement, cc | 1597 |
| Engine power, hp/rpm | 94/5500, 103/6000, 113/6000, 147/7000, 170/7500 |
| Torque, Nm/rpm | 135/4000, 141/4500, 137/5000, 149/4500, 167/7000 |
| Fuel | 95 |
| Environmental standards | up to Euro 3 |
| Engine weight, kg | ~145 |
| Fuel consumption, l/100 km | city: 10.1, highway: 5.8, mixed: 7.4 |
| Oil consumption, gr./1000 km | to 1000 |
| Engine oil | 5W-30, 5W-40, 5W-50, 10W-30, 10W-40, 10W-50, 15W-40, 15W-50, 20W-40, 20W-50 |
| How much oil in the engine, liters | 3.8 |
| Oil change is carried out, km | 10000 |
| Engine operating temperature, deg. | 90-95 |
| Engine life, thousand kilometers | Factory data: -, in practice: 200-250 |
| Tuning, hp | potential: 300+, without loss of resource: n.d. |
| Motor installed | Mitsubishi Carisma, Mitsubishi Colt (Mirage), Mitsubishi Lancer, Mitsubishi Dingo, Mitsubishi Libero, Proton Satria, Proton Wira |
Mitsubishi 4G92 engine troubleshooting and repair
The 4G92 engine is a short-stroke variant of the 4G9 family with a displacement of 1.6 liters. Developed on the basis of the well-known 4G93, it is characterized by a reduced piston stroke from 89 mm to 77.5 mm, which led to a reduction in the height of the cylinder block from 208.75 mm to 188.75 mm (which does not always suit fans of increasing the working volume). The connecting rods are 120mm long and the piston height is 30mm.
The cylinder head for the 4G92 can be equipped with either a single SOHC camshaft or two DOHC camshafts. For the more powerful versions with two camshafts, the cylinder head can be equipped with the MIVEC variable camshaft timing system, allowing 175 hp in atmospheric performance with more aggressive camshafts. Single-shaft versions are not equipped with hydrocompensators, and valve clearance adjustment for the 4G92 SOHC is performed every ~50,000 km. Valve clearances for a hot engine are 0.2mm for intake and 0.3mm for exhaust, and for a cold engine are 0.1mm for intake and 0.2mm for exhaust. The timing is driven by a belt, which must be changed every 90 thousand kilometers. If the timing belt breaks on the 4G92 engine, the valves may be damaged.
Other modifications were also produced on the basis of this engine: 1.8-liter 4G93, 2.0-liter 4G94 and 1.5-liter 4G91.
Faults 4G92 and their causes
- SOHC modification of the motor is very reliable and even if the belt breaks, it does not bend the valves
- But SOHC version does not have hydrocompensators, valves are adjusted once every 50,000 km
- DOHC versions are more capricious and prone to oil build-up after 150,000 km
- In addition, hydrocompensators in DOHC versions fail relatively quickly
- A common problem with all engines in the series is the low reliability of attachments