Technical Specifications
| Manufacture | Kyoto engine plant |
| Engine brand | 4G9 |
| Years of manufacture | 1991-2010 |
| Cylinder block material | cast iron |
| Power system | Carburetor/injector |
| Type | row |
| Number of cylinders | 4 |
| Valves per cylinder | 4 |
| Piston stroke, mm | 89 |
| Cylinder diameter, mm | 81 |
| Compression ratio | 8.5 9.1 9.5 10.0 10.5 12.0 |
| Engine capacity, cc | 1834 |
| Engine power, hp/rpm | 110/6000 115/5500 120/5250 125/5500 131/5500 140/6500 150/6500 160/5200 165/5500 194/6000 205/6000 215/6000 |
| Torque, Nm/rpm | 154/3000 162/4500 174/3500 174/3750 181/3500 167/5500 178/5000 220/3500 220/3500 270/3000 275/3000 284/3000 |
| Fuel | 92-95 |
| Environmental standards | up to Euro 4 |
| Engine weight, kg | ~150 |
| Fuel consumption, l/100 km – city – highway – mixed. |
9.2 5.7 7.0 |
| 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 3.9 (Turbo) |
| When replacing fill, l | 3.5 |
| Oil change is carried out, km | 10000 (better 5000) |
| Engine operating temperature, deg. | 90-95 |
| Engine life, thousand kilometers – according to the factory data – in practice |
– 200-250 |
| Tuning – potential – without loss of resource |
250+ n.d. |
| Motor installed | Mitsubishi Carisma Mitsubishi Colt (Mirage) Mitsubishi Galant Mitsubishi Lancer Mitsubishi RVR/Space Runner Mitsubishi Dingo Mitsubishi Emeraude Mitsubishi Eterna Mitsubishi FTO Mitsubishi Libero Mitsubishi Pajero iO Mitsubishi Space Star Mitsubishi Space Wagon Brilliance BC3 Brilliance BS6 Brilliance BS4 Proton Wira Proton Satria Proton Putra Volvo S40 Volvo V40 |
Mitsubishi 4G93 engine troubleshooting and repair
Very popular 2-liter motor, produced for 20 years, is a cast iron cylinder block covered with a single-shaft head SOHC, or two-shaft DOHC with a belt-driven timing (Belt replacement is carried out every 90 thousand km, if the belt is broken 4G93 will bend valves). 4G93 engines are equipped with hydrocompensators and constant adjustment of valves will not threaten you.
The first versions came with a carburetor and the cylinder head with a single camshaft, later the carb gave way to distributed injection MPI and direct fuel injection GDI, the latter option received very mixed reviews. In addition, there were both atmospheric modifications and versions with turbocharged 4G93T, the power of turbo engines ranged from 160 to 215 hp.
On the basis of this power unit were created engines of different working volume: 1.6-liter 4G92, 2.0-liter 4G94 and 1.5-liter. 4G91.
Faults 4G93 and their causes
- Engine knocking. Typical 4G93 problem, it is the hydrocompensators, and to solve the problem, they need to be changed. Next time, pour quality engine oil.
- High oil consumption (oil burn). This is a normal state of affairs for a motor with decent mileage, considering that 4G93 is very prone to fouling. Decalcifying will not help, you need to change the oil caps and rings.
- RPMs float. On GDI engines, the main culprit is the fuel injector, cleaning the filter will help. In addition, do not forget to clean the throttle block.
- Stalls on hot. Check the idle speed regulator, most likely you need to replace it.
In addition, the 4G93 GDI from the EGR valve is constantly soot in the intake manifold and requires regular cleaning, in severe frosts often floods the plugs, the engine itself likes good quality oil and fuel, constant care and control.
To summarize, the motor is normal, medium reliability, to take or not to decide you.
Mitsubishi 4G93 engine tuning
4G93 MIVEC
A pretty reasonable way to increase the power of the 4G93 1.8 engine is to give it a MIVEC. To do this we will need a 4G92 cylinder head with gasket and intake manifold, pistons from a 92, standard connecting rods, timing belt from a 4G64, injectors from a 390 cc Lancer GSR, ECU from a 4G92. All this will significantly raise the power (180-190 hp) and greatly increase the maximum rpm. For even more swing of the motor it is necessary to port the head, combine channels, put wide shafts (there are plenty of variants), cold intake, damper from 63 mm, Skunk2 receiver, build an exhaust on 63rd pipe with 4-2-1 collector, adjust and spin until it falls apart. Such configs give well over 200hp, but they don’t last long.
Turbine on 4G93
A rather expensive, labor intensive and irrational way to increase the power of the 4G93 is a turbine. For supercharging, we’ll need a third-party turbo kit, either from a 4G93T, based on the TD04L. The first thing you need to do is to install oil injectors, replace the sprag with the same one from 4G93T for low compression ratio (or forging), install the kit with intercooler, injectors from 390 cc, exhaust from 63 mm, adjust and safely blow up to 0.8-1 bar in the stock piston 4G93T. Similar things can be realized on MIVEC cylinder head from 4G92.
Considering all the financial and labor costs to convert GDI to turbo, it is much easier to initially buy a contract 4G93 T or 4G63 T or a car with such power units.
ENGINE RATING: 4-