The Honda F18A3 is a 1,834 cc, inline‑four petrol engine produced between 1998 and 2001. It features a single overhead camshaft (SOHC) with 16 valves and Honda's PGM-FI (Programmed Fuel Injection) system. This design offered a balance of smooth power delivery and fuel efficiency for its era, delivering 92 kW (125 PS) and 162 Nm of torque.
Fitted primarily to the sixth-generation Honda Accord (CD) for the European market, the F18A3 was engineered for refined, comfortable performance in mid-size sedans and estates. Emissions compliance for its production period was met through electronic fuel injection and a catalytic converter, allowing it to meet Euro 2 standards.
One documented engineering characteristic is its use of a balance shaft to reduce vibration, which is detailed in Honda Service Bulletin 98-033. This feature, uncommon in many contemporary four-cylinder engines, was implemented to enhance refinement and NVH characteristics in the larger Accord platform.
Honda
Production years 1998–2001 meet applicable European emissions standards (Euro 2) for passenger vehicles of that era (Honda Internal Emissions Certification Docs).
The Honda F18A3 is a 1,834 cc inline‑four naturally aspirated petrol engine engineered for mid-size sedans and estates (1998-2001). It combines SOHC 16-valve architecture with PGM-FI fuel injection and a balance shaft to deliver smooth, linear power and refined cruising. Designed to meet late-1990s emissions standards, it prioritizes drivability and mechanical simplicity.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,834 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 81.0 mm × 89.0 mm | |
| Power output | 92 kW (125 PS) @ 5,500 rpm | |
| Torque | 162 Nm @ 4,300 rpm | |
| Fuel system | PGM-FI (Programmed Fuel Injection) | |
| Emissions standard | Euro 2 | |
| Compression ratio | 9.3:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven | |
| Oil type | 10W-40 (API SJ) | |
| Dry weight | 135 kg |
The balance shaft provides exceptional smoothness for a four-cylinder engine but adds complexity. Strict adherence to 90,000 km timing belt replacement intervals is critical to prevent catastrophic failure. The PGM-FI system requires clean fuel filters and properly functioning sensors for optimal performance. The distributor-based ignition system should be inspected for wear. Regular oil changes with the correct viscosity protect the valvetrain and balance shaft bearings.
Oil Specs: Requires 10W-40 meeting API SJ specification (Honda Owner's Manual 1999 Accord).
Emissions: Certification applies to 1998-2001 models for European markets (Honda Internal Emissions Certification Docs).
Power Ratings: Measured under JIS D 1001 standards (Honda Group PT-2000).
Honda Technical Information System (TIS): Workshop Manual 1999 Accord, SIB 98-033
Honda Electronic Parts Catalogue (EPC): Doc. H-F18A3-98
Honda Owner's Manual: 1999 Accord
The Honda F18A3 was used across Honda's CD platform with transverse mounting. This engine received minor ECU and accessory bracket variations between sedan and estate body styles, creating minor part number differences. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the engine block, near the timing belt cover (Honda Workshop Manual 1999 Accord). Visually, it can be identified by its SOHC valve cover and the presence of a balance shaft housing at the bottom of the engine block. Critical differentiation from the F20B: The F18A3 has a smaller displacement (1.8L vs 2.0L) and lower power output. The distributor is mounted at the rear of the cylinder head.
The F18A3 is generally robust, with the primary long-term concern being timing belt failure if replacement intervals are neglected. Honda service data indicates that failure to replace the belt at 90,000 km can lead to catastrophic engine damage due to its interference design. The distributor and balance shaft seals are also common wear items after 150,000 km.
Analysis derived from Honda technical bulletins (1998-2001) and aggregated workshop repair data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HONDA F18A3.
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