H23A2 engine — BB 2.3 (2.3L)
2.3L · 160 hp
Engine overview
Vehicles with this engine
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
| Engine code | H23A2 |
| Capacity | 2259 cc |
| Idle speed | 780 ± 50 rpm |
| Inlet | 0.07 - 0.11 mm |
| Exhaust | 0.15 - 0.19 mm |
| Normal | 12.5 bar |
| Minimum | 9.5 bar |
| Oil pressure | 3.5/3000 bar/rpm |
Engine (petrol)
| Fuel system (make and type) | Honda PGM-Fi |
| Number of cylinders | 4 |
| Firing order | 1-3-4-2 |
| Timing stroboscopic (before TDC) | 15 ± 2/780 °/rpm |
| Ignition coil resistance, primary | 0.6 - 0.8 ohms |
| Ignition coil resistance, secondary | 12900 - 19200 14400 - 21600 ohms |
| Spark plugs (make and type) | NGK ZFR6F-11 |
| Spark plug gap | 1.0 - 1.1 mm |
| Fuel pump pressure | 2.5 - 3.0 bar |
| Injection pressure/system pressure | 2.55 - 3.05 bar |
| CO exhaust gas | < 0.5 % |
| CO2 | 14.5 - 16.0 % |
| HC | 100 ppm |
| O2 | 0.1 - 0.5 % |
| CO at fast-idle speed | < 0.3 % |
| Fast-idle speed | 2300 - 2700 rpm |
| Lambda | 0.97 - 1.03 |
| Lambda change (Delta Lambda) | 0.03 |
| Oil temperature during test | 80 °C |
| Closed-loop test at: | 600 - 1000 rpm |
| Basic method (Germany only) | 1 0.04 (bar) |
| Alternative method (Germany only) | 2 |
Cooling system
| Cap pressure | 0.95 - 1.25 bar |
| Thermostat opens at | 76 - 80 °C |
| Fan on at | 92 - 98 °C |
Electrical
| Battery | 52 Ah |
| Alternator | 90 A |
Capacities
| Engine sump, incl. filter | 4.0 l |
| Gearbox refill | 2.4 l |
| Cooling system | 7.3 l |
| Air-conditioner refrigerant | 650 - 700 g |
| Air-conditioner compressor oil | 120 ml |
Torque settings
| Cylinder head bolts — Stage 1 | 40 Nm |
| Cylinder head bolts — Stage 2 | 70 Nm |
| Cylinder head bolts — Stage 3 | 100 Nm |
| Front hub | 250 Nm |
| Rear hub | 185 Nm |
| Wheel nuts | 110 Nm |
| Spark plugs | 18 Nm |
Workshop procedures for this engine
Step-by-step procedures from the workshop database.
Got a H23A2 problem? Ask for free.
Describe the symptoms — TorqFix replies with a diagnosis cited from verified workshop data.
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.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 22 Aug 2026.