The Honda H22A1 is a 2,259 cc, inline‑four naturally aspirated petrol engine produced between 1997 and 2001. It features a single overhead camshaft (SOHC) 16‑valve design with Honda's VTEC system engaging at 5,200 rpm and PGM‑FI fuel injection. This configuration delivers a balance of low‑end torque and a distinct high‑revving power surge, making it ideal for spirited driving.
Fitted primarily to the fourth-generation (BB4/BB6) Honda Prelude for the North American market, the H22A1 was engineered to offer accessible performance with everyday refinement. Emissions compliance for its era was achieved through precise fuel metering and ignition control, meeting US EPA Tier 1 and California Air Resources Board (CARB) standards applicable to 1997–2001 model years.
One documented service consideration is the potential for VTEC oil pressure switch failure, which can prevent the system from engaging or trigger a ‘Check Engine’ light, as noted in Honda Service Bulletin 98‑033. This is typically caused by age-related electrical failure or oil contamination. The engine was succeeded by the H22A4 in 2002, which featured minor revisions for improved emissions.
Honda
Production years 1997–2001 meet US EPA Tier 1 and CARB emissions standards for light-duty vehicles (EPA Engine Family H22A1.5HAX).
The Honda H22A1 is a 2,259 cc inline‑four naturally aspirated petrol engine engineered for sport coupe applications (1997-2001). It combines SOHC VTEC architecture with PGM-FI electronic fuel injection to deliver a characteristic powerband with a noticeable surge above 5,200 rpm. Designed to meet contemporary US emissions standards, it balances sporting character with daily-driver practicality.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,259 cc | |
| Fuel type | Petrol (Gasoline) | |
| Configuration | Inline‑4, SOHC, 16‑valve, VTEC | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 87.0 mm × 95.0 mm | |
| Power output | 127 kW (172 PS) @ 6,300 rpm | |
| Torque | 215 Nm @ 5,250 rpm | |
| Fuel system | Honda PGM‑FI (Programmed Fuel Injection) | |
| Emissions standard | US EPA Tier 1 / CARB | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt‑driven SOHC | |
| Oil type | API SG/SH 10W‑40 or 5W‑30 | |
| Dry weight | 150 kg |
The SOHC VTEC system provides a thrilling power surge above 5,200 RPM but requires strict adherence to 10,000 km oil change intervals to ensure reliable oil pressure for engagement. Using the specified API SG/SH oil is critical for protecting the VTEC mechanism. The timing belt must be replaced every 90,000 km or 6 years to prevent catastrophic failure, as this is an interference engine. The PGM-FI system demands a healthy battery for optimal sensor operation. VTEC oil pressure switches are prone to failure and should be inspected if engagement issues arise, per Honda SIB 98-033.
Oil Specs: Requires API SG/SH specification (Honda Owner's Manual). ACEA A3/B3 is an acceptable modern equivalent.
Emissions: Meets US EPA Tier 1 and CARB standards for 1997-2001 model years (EPA Engine Family H22A1.5HAX).
Power Ratings: Measured under SAE J1349 standards. Output is consistent across all model variants (Honda Workshop Manual).
Honda Technical Information System (TIS): Workshop Manual (1997), SIB 98-033
US Environmental Protection Agency (EPA) Engine Certification Database
Honda EPC (Electronic Parts Catalogue) Doc. H-H22A1-97
SAE International: J1349 Engine Power Certification Standards
The Honda H22A1 was used across Honda's BB platform with transverse mounting and was not licensed to other manufacturers. This engine received minor platform-specific adaptations-different intake manifolds and engine mounts between trim levels-but no major facelift revisions occurred during its production run, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the engine block, just below the cylinder head and behind the alternator (Honda Workshop Manual). The 8th VIN digit for H22A1-equipped BB Preludes is typically 'H'. Visually, it features a black or silver valve cover with "SOHC VTEC" embossed on top. Critical differentiation from the H23A: The H22A1 has a VTEC solenoid and oil pressure switch on the rear of the cylinder head, near the distributor. The engine harness connector for PGM-FI is unique to this engine family.
The H22A1's primary long-term concern is VTEC oil pressure switch failure, with elevated incidence in high-mileage vehicles. Honda service data indicates this is a common electrical wear item, while owner reports frequently cite distributor bearing wear. Aggressive driving and aftermarket exhausts without proper tuning can strain the ECU, making preventative maintenance critical.
Analysis derived from Honda technical bulletins (1997-2001) and aggregated owner workshop data (1998-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HONDA H22A1.
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