EGH engine — RG 3.8 (3.8L)
3.8L · 178-218 hp
Engine overview
Vehicles with this engine
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
| Engine code | EGH |
| Capacity | 3778 cc |
| Idle speed | 575 - 875 rpm |
| Minimum | 6.9 bar |
| Max. compression loss between cylinders | 25% % |
| Oil pressure | 3.4 / 575 - 875 bar/rpm |
| Oil pressure | 2.05 - 5.51 / 3000 bar/rpm |
Engine (petrol)
| Fuel system (make and type) | MPI |
| Number of cylinders | 6 |
| Firing order | 1 - 2 - 3 - 4 - 5 - 6 |
| Ignition coil resistance, primary | 0.45 - 0.65 ohms |
| Ignition coil resistance, secondary | 7000 -15800 ohms |
| Spark plugs (make and type) | Champion RN 14 PMP 5 |
| Spark plug gap | 1.2 - 1.3 mm |
| Fuel pump pressure | 6.4 bar |
| Injection pressure/system pressure | 3.4 bar |
| CO exhaust gas | < 0.5 % |
| CO at fast-idle speed | < 0.3 % |
| Fast-idle speed | 2500 - 2800 rpm |
| CO2 | > 14.0 % |
| HC | < 100 ppm |
| O2 | 0.1 - 0.5 % |
| Lambda | 0.97 - 1.03 |
| Lambda change (Delta Lambda) | 0.03 |
Cooling system
| Cap pressure | 0.97-1.24 bar |
| Thermostat opens at | 88° - 93° °C |
| Stage 1/Fan 1 | 104° °C |
| Stage 2/Fan 2 | 110° °C |
Electrical
| Battery | 66 Ah |
| Alternator | 90 / 120 A |
Capacities
| Engine sump, incl. filter | 4.3 l |
| Gearbox refill | 2.3 l |
| Gearbox refill | 3.8 l |
| Cooling system | 12.5 l |
Torque settings
| Cylinder head bolts — Stage 1 | 60 Nm |
| Cylinder head bolts — Stage 2 | 90 Nm Nm |
| Cylinder head bolts — Stage 3 | 90 Nm Nm |
| Cylinder head bolts — Stage 4 | 90° ° |
| Front hub | 245 Nm |
| Rear hub | 130 Nm |
| Wheel nuts | 135 Nm |
| Spark plugs | 30 Nm |
Emissions
| Emission code | 70/220*1996/69 |
| Emission standard | Euro 2 |
| CO2 average | 322 g/km |
| CO | 0.690 - 0.750 g/km |
| HC NOx | 0.250 - 0.280 g/km |
Engine codes in the same family
The same code prefix usually means the same block with a different output, fuel or model year. Procedures are often shared — check the code on the engine plate.
Workshop procedures for this engine
Step-by-step procedures from the workshop database.
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Get free diagnosis →Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
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The story behind TorqFix →Workshop data on this page last updated 22 Aug 2026.