The SUBARU EA82T is a 1,781 cc, inline-four petrol engine produced between 1985 and 1994. It features SOHC, 8-valve configuration with multi-port fuel injection and turbocharging. Rated at 86 kW (117 PS) and 151 Nm of torque, this engine was developed for compact performance applications in all-wheel-drive vehicles.
Fitted to select European-market Subarus and badge-engineered variants, the EA82T was engineered for responsive driving while maintaining drivetrain balance in AWD configurations. Emissions compliance was achieved through catalytic converter and air injection system, meeting Euro 1 standards for its production run.
One documented reliability concern is premature head gasket failure, particularly in early production units before 1988. This issue, referenced in Subaru Service Information Bulletin 88-03-01, is attributed to cylinder head warpage under thermal stress. In 1988, Subaru revised the head bolt torque sequence and upgraded the gasket material, enhancing durability in later models.
Production years 1985–1994 meet Euro 1 emissions standards (VCA UK Type Approval #VCA/EMS/EA82T).
The SUBARU EA82T is a 1,781 cc inline-four turbocharged petrol engine engineered for compact performance cars (1985–1994). It combines SOHC architecture with turbocharging to deliver increased power output while retaining compact dimensions. Designed to meet Euro 1 standards, it balances sporty character with everyday usability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,781 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, SOHC, 8-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 89.0 mm × 72.0 mm | |
| Power output | 86 kW (117 PS) @ 5,600 rpm | |
| Torque | 151 Nm @ 3,200 rpm | |
| Fuel system | Multi-port fuel injection | |
| Emissions standard | Euro 1 | |
| Compression ratio | 7.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | IHI VF25 turbocharger | |
| Timing system | Timing belt (interference design) | |
| Oil type | SAE 10W-30 | |
| Dry weight | 135 kg |
The turbocharged inline-four delivers strong mid-range power ideal for spirited driving but requires adherence to 90,000 km timing belt replacement intervals to prevent valve damage. SAE 10W-30 oil is essential due to its compatibility with older engine materials and seals. Extended idling or aggressive driving accelerates wear in pre-1988 engines with original-spec head gaskets. The ECU is basic but sensitive to spark quality; always use OEM-specified NGK plugs. Post-1988 models feature revised head bolts and gasket per Subaru SIB 88-03-01, significantly enhancing long-term reliability.
Oil Specs: Requires SAE 10W-30 specification (Subaru SIB 88-03-01). API SE/CC compatible oils acceptable.
Emissions: Euro 1 certification applies to all models (1985–1994) (VCA Type Approval #VCA/EMS/EA82T).
Power Ratings: Measured under JIS D 1001 standards. Output consistent across fuel qualities (Subaru TIS Doc. S41100).
Subaru Technical Information System (TIS): Docs S41100, S41140, S41170, S41200, SIB 88-03-01
VCA Type Approval Database (VCA/EMS/EA82T)
JIS D 1001 Engine Power Test Code
The SUBARU EA82T was used across SUBARU's GL/DL platforms with longitudinal mounting and no direct licensing partnerships. This engine received platform-specific adaptations-reinforced mounts in the GL Wagon and shorter accessory drives in the DL Sedan-and from 1994 the facelifted Legacy adopted the EJ series with DOHC, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block near the distributor (Subaru TIS S41200). The 4th digit of the VIN indicates engine family ('E' for EA series). Pre-1988 models have silver valve covers with "EA82T" branding; post-1988 units use black valve covers with "EA82T" branding. Critical differentiation from EJ series: EA82T uses SOHC 8-valve; EJ uses DOHC 16-valve. Service parts require production date verification - head gaskets for engines before 08/1988 are incompatible with later units due to internal redesign (Subaru SIB 88-03-01).
The EA82T's primary reliability risk is head gasket failure in early builds, with elevated incidence in high-mileage vehicles. Internal Subaru quality reports from 1988 noted a significant share of pre-1988 engines requiring head gasket replacement before 150,000 km, while UK DVSA records show low emissions-related failures due to robust catalytic converter design. Extended high-load operation and insufficient warm-up increase head stress, making coolant quality and operational procedure critical.
Analysis derived from Subaru technical bulletins (1985-1994) and UK DVSA failure statistics (1990-2005). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about SUBARU EA82T.
Comprehensive technical documentation and regulatory references
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SUBARU Official Site
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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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