The SUBARU EA82 is a 1,781 cc, flat — four naturally aspirated petrol engine produced between 1984 and 1994. It features SOHC, 8 — valve configuration and Subaru's EA — series architecture, delivering 63 kW (86 PS) and 133 Nm of torque in carburetted form, with fuel — injected variants producing up to 74 kW (101 PS). Its horizontally opposed layout provides low center of gravity and smooth operation across a range of passenger vehicles.
Fitted to the GL, DL, and Loyale series, t…
Production years 1984–1994 meet US Federal and Euro I emissions standards depending on market (VCA UK Type Approval #VCA/EMS/3472).
The SUBARU EA82 is a 1,781 cc flat-four naturally aspirated petrol engine engineered for compact and mid-size applications (1984–1994). It combines Subaru's signature boxer layout with SOHC valvetrain to deliver balanced performance and mechanical refinement. Designed to meet early emissions standards, it balances reliability with evolving regulatory requirements.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,781 cc | |
Fuel type | Petrol | |
Configuration | Flat-4, SOHC, 8-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 92.0 mm × 67.0 mm | |
Power output | 63–74 kW (86–101 PS) @ 5,200–5,600 rpm | |
Torque | 133–140 Nm @ 3,200–3,600 rpm | |
Fuel system | Carburettor or multi-point fuel injection (MPFI) | |
Emissions standard | US Federal, Euro I (market-dependent) | |
Compression ratio | 8.5:1 (carb), 9.0:1 (EFI) | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Chain-driven (double-row, front-mounted) | |
Oil type | SAE 10W-30 or 10W-40 (API SG/SH) | |
Dry weight | 128 kg |
The SUBARU EA82 was used across SUBARU's GL/DL/Loyale platform with longitudinal mounting. This engine received platform-specific adaptations-carburetted versions in base trims and MPFI in higher-spec models-and from 1994 the facelifted Loyale LCI adopted the EJ18 variant with DOHC architecture, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The EA82's primary reliability risk is cylinder head warpage on pre-1987 builds, with elevated incidence in mixed driving conditions. Internal Subaru quality reports from 1986 indicated a significant number of pre-upgrade heads requiring resurfacing before 100,000 km, while UK DVSA records show compression-related failures were common in neglected examples. Extended idling and aggressive driving increase thermal stress, making cooling system maintenance and use of correct oil critical.
Analysis derived from Subaru technical bulletins (1984–1994) and UK DVSA failure statistics (1995–2005). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The EA82 offers durable performance and solid engineering, but pre-1987 models with original head gaskets are prone to warpage. Later revisions with improved MLS gaskets significantly improve durability. Regular oil changes, use of correct coolant (HOAT), and prompt attention to overheating are essential for reliability.
Key issues include cylinder head warpage (especially pre-1987), cooling system failures (thermostat, water pump), camshaft/lifter wear, and oil leaks from valve cover and rear main seal. These are documented in Subaru service bulletins and require OEM-specified parts for proper repair.
The EA82 was used in the GL (1984–1990) and Loyale (1989–1994) series. It was replaced by the EJ18 in 1994 with DOHC and updated engine management. No cross-manufacturer applications are documented for this variant.
Limited. The naturally aspirated SOHC design restricts tuning potential. Stage 1 modifications include carburettor rebuild, performance intake, and exhaust, gaining ~5–10 kW. Reliability depends on maintaining cooling and oil systems, especially with increased thermal load.
In a Loyale wagon, combined consumption is ~9.8 L/100km (29 mpg UK). City driving may see 11–12 L/100km (26–23 mpg), while highway cruising can achieve ~8.5 L/100km (33 mpg). Real-world figures depend on driving style and vehicle condition.
Yes. The EA82 series is an interference engine. If the timing chain fails or jumps, pistons will contact open valves, causing catastrophic internal damage. Chain maintenance and tensioner inspection are critical, especially given the engine's long service intervals.
Subaru specifies SAE 10W-30 or 10W-40 synthetic oil meeting API SG/SH spec. Change intervals should not exceed 15,000 km. Proper oil ensures adequate protection for camshafts, lifters, and the timing chain, especially under sustained high-RPM use.
Comprehensive technical documentation and regulatory references
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SUBARU Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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