The Honda H22A2 is a 2,259 cc, inline‑four naturally aspirated petrol engine produced between 1997 and 2001. It features a dual overhead camshaft (DOHC) 16‑valve layout and Honda's PGM‑FI fuel injection system. This configuration prioritizes strong mid-range torque and high-revving power, producing a peak output of 185 PS.
Fitted primarily to the European‑spec Honda Accord Type R (CH1) and Prelude (BB6), the H22A2 was engineered for spirited performance and driver engagement. Emissions compliance for its production era was managed through precise fuel metering and a catalytic converter, meeting Euro 2 standards applicable to vehicles registered from January 1997 onwards.
One documented engineering focus was optimizing the intake manifold for a broader torque curve, addressed through specific runner length and plenum volume as detailed in Honda Service Bulletin 98‑031. Later H22 variants, like the H22A7, incorporated minor revisions to the cylinder head and ECU for enhanced emissions control.
Honda
Production years 1997–2001 meet Euro 2 standards for vehicles registered from January 1997 (VCA UK Type Approval #VCA/HON/97/01).
The Honda H22A2 is a 2,259 cc inline‑four naturally aspirated petrol engine engineered for performance sedans and coupes (1997-2001). It combines DOHC 16-valve architecture with PGM-FI electronic fuel injection to deliver a broad, linear powerband. Designed to meet Euro 2 emissions standards, it balances high-RPM excitement with strong mid-range pull.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,259 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 87.0 mm × 95.0 mm | |
| Power output | 185 PS (136 kW) @ 6,800 rpm | |
| Torque | 22.0 kgf·m (216 Nm) @ 5,500 rpm | |
| Fuel system | Honda PGM-FI (Programmed Fuel Injection) | |
| Emissions standard | Euro 2 | |
| Compression ratio | 10.6:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven DOHC | |
| Oil type | 10W-40 API SG/SH (Mineral/Semi-Synthetic) | |
| Dry weight | Not specified in primary sources |
The DOHC design provides a thrilling, high-revving character but requires a timing belt replacement every 90,000 km to prevent catastrophic failure. Using the specified 10W-40 oil is recommended for optimal lubrication of the valvetrain. The engine is sensitive to ignition timing; incorrect settings can lead to detonation or reduced power. The distributor-based ignition system requires periodic inspection of the cap, rotor, and HT leads. The VTEC system engages around 5,200 rpm, demanding premium fuel (98 RON) for optimal performance and to prevent knocking.
Oil Specs: Requires 10W-40 API SG/SH specification (Honda Owner's Manual CH1/BB6). Modern equivalents meeting API SL/SM are acceptable if viscosity is correct.
Emissions: Certified to Euro 2 standards for vehicles registered from Jan 1997 (VCA Type Approval #VCA/HON/97/01).
Power Ratings: Measured under JIS D 1001 standards. Output figures are for the European-spec Accord Type R variant (Honda Group PT-2000).
Honda Technical Information System (TIS): Workshop Manuals CH1/BB6
Honda Electronic Parts Catalogue (EPC): Doc. H-H22A2-97
Honda Service Bulletin Database: SB 98-031
Japanese Industrial Standards: JIS D 1001 Engine Power Measurement
The Honda H22A2 was used across Honda's CH and BB platforms with transverse mounting and was not licensed to other manufacturers. This engine received minor platform-specific adaptations-primarily in accessory bracket positioning for the Accord versus the Prelude-and no major facelift revisions occurred during its production run, ensuring good interchangeability within its model years. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the cylinder block, just below the exhaust manifold (Honda Workshop Manual CH1/BB6). The 8th digit of the VIN for CH/BB chassis is 'H' for the H-series engine family. The H22A2 is visually identified by its red valve cover with "H22A" and "DOHC VTEC" cast into it. The intake manifold features a large, single plenum. Critical differentiator from H22A7: The H22A2 uses a different ECU (P13) and has a slightly different intake manifold runner design. Service parts like the cylinder head and intake manifold are generally interchangeable between A2 and A7.
The H22A2's primary reliability consideration is the timing belt, with failure resulting in immediate engine damage. Honda service data indicates that neglecting the 90,000 km replacement interval is the leading cause of major engine failure. High-mileage operation and infrequent oil changes amplify wear on the valve train and main bearings, making adherence to maintenance schedules critical.
Analysis derived from Honda technical bulletins (1997-2002) and aggregated workshop repair data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HONDA H22A2.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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