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1991 Subaru XT & XT6 Service Repair Manual 91

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Basic Information Identification Make: Subaru Model: XT / XT6 Year: 1991 Introduction Market Position Positioning: The 1991 Subaru XT and XT6 represented Subaru's entry into the personal luxury/sports coupe market,...
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标签: Subaru XT
1991 Subaru XT & XT6 Service Repair Manual 91
Basic Information
Identification
Make: Subaru
Model: XT / XT6
Year: 1991
Introduction
Market Position
Positioning: The 1991 Subaru XT and XT6 represented Subaru's entry into the personal luxury/sports coupe market, focusing on distinctive styling and its signature AWD system. This manual is essential for owners and technicians working on these unique vehicles.
Competitive Analysis
Competitors: Competed with vehicles like the Toyota Celica, Mitsubishi Eclipse, and Ford Probe, offering a unique AWD advantage and distinctive 'Brat-like' styling cues in its lineage.
Key Features
Features: Aerodynamic 'wedge' styling, optional 'turbo' engine (XT), Symmetrical All-Wheel Drive, unique interior design, pop-up headlights.
Manual Details
Coverage Areas
Systems Covered: Engine Mechanical, Engine Fuel & Emission Control, Engine Electrical, Drivetrain (AWD System), Transmission (Manual & Automatic), Suspension, Steering, Brakes, Body Electrical, Climate Control, Body & Chassis, Wiring Diagrams, Maintenance, Troubleshooting, Diagnostics
Page Count
Pages: Approximately 1500+
Manual Type
Type: Factory Service Manual (FSM) / Repair Manual
Language
Language: English
Format
Format: Printed Paperback
Manual Coverage
Systems Covered
Engine Mechanical: Cylinder head, valve train, pistons, connecting rods, crankshaft, engine assembly, lubrication system, cooling system
Engine Fuel Emission: Fuel injection system (MPI), throttle body, exhaust system, emissions control systems (catalytic converter, EGR), fuel pump, fuel filter
Engine Electrical: Ignition system, starter motor, alternator, battery, ECU (Engine Control Unit) and sensor diagnostics
Drivetrain: Subaru's Symmetrical All-Wheel Drive (AWD) system, front and rear differentials, driveshafts, CV joints
Transmission: 4-speed Automatic Transmission (4EAT) and 5-speed Manual Transmission, clutch system, torque converter, transmission fluid specifications and service
Suspension: Front suspension (struts, control arms), rear suspension (struts, trailing arms), springs, shock absorbers, wheel alignment specifications
Steering: Power steering system, steering rack, steering column, universal joints, steering fluid specifications
Brakes: Front and rear disc brakes, brake master cylinder, brake lines, ABS (Anti-lock Braking System) components and diagnostics, brake fluid specifications
Body Electrical: Lighting system, wipers, power windows, door locks, mirrors, horn, interior and exterior lamps, fuse box, relay locations
Climate Control: Air conditioning system (R-12 refrigerant), heating system, blower motor, controls, refrigerant charging specifications
Body Chassis: Body panels, doors, hood, trunk lid, interior trim, bumpers, chassis components, structural integrity
Wiring Diagrams: Complete, detailed wiring schematics for all vehicle systems
Procedures Included
Maintenance: Oil changes, filter replacements (oil, air, fuel), spark plug replacement, coolant flush, brake fluid service, transmission fluid service, belt inspection and replacement
Troubleshooting: Diagnostic procedures for common and complex issues, symptom-based troubleshooting charts
Repair: Detailed step-by-step instructions for component removal, installation, and repair for all major systems
Diagnostics: Engine diagnostic codes (OBD-I equivalent), sensor testing, component testing procedures
Technical Depth
Depth: Comprehensive from basic maintenance to complete engine and transmission overhauls, including electrical system troubleshooting and component-level repair.
Manual Specifications
File Format
Format: Printed, bound manual
Print Quality
Quality: High-quality printing with clear diagrams and text
Binding Type
Binding: Perfect bound or stitched binding for durability
Paper Type
Paper: Durable, semi-gloss paper stock suitable for workshop use
Engine Specifications
Primary Engine
Engine Xt: 2.7L EA82T (Turbocharged) Boxer-4
Engine Xt6: 3.0L ER27 Boxer-6
Performance Xt
Horsepower Xt: 115 hp @ 5200 rpm (Naturally Aspirated) / 130 hp @ 4800 rpm (Turbocharged)
Torque Xt: 124 lb-ft @ 2800 rpm (Naturally Aspirated) / 144 lb-ft @ 2400 rpm (Turbocharged)
Performance Xt6
Horsepower Xt6: 145 hp @ 5600 rpm
Torque Xt6: 166 lb-ft @ 4000 rpm
Fuel System
Fuel System Type: Multi-Point Fuel Injection (MPI) for both engines
Fuel Type
Fuel Requirement: Unleaded gasoline (87 octane recommended for naturally aspirated, 91 octane recommended for turbo/XT6)
Engine Code Xt
Engine Code: EA82T
Engine Code Xt6
Engine Code: ER27
Transmission
Standard
Transmission Xt Standard: 5-Speed Manual Transmission
Transmission Xt6 Standard: 4-Speed Automatic Transmission (4EAT) with AWD
Optional
Transmission Xt Optional: 4-Speed Automatic Transmission (4EAT) with AWD
Features
AWD System: Full-time Symmetrical All-Wheel Drive with viscous coupling center differential (manual) or electronic control (automatic).
Fluid Specifications Automatic
Atf Type: Subaru ATF HP / Dexron III (refer to manual for exact specification)
Fluid Specifications Manual
Mtf Type: GL-5 Gear Oil (refer to manual for viscosity)
Dimensions
Exterior Length
Length: Approximately 177 inches
Exterior Width
Width: Approximately 67 inches
Exterior Height
Height: Approximately 51 inches
Wheelbase
Wheelbase: Approximately 97.2 inches
Weights
Curb Weight: Approximately 2800 - 3100 lbs (depending on model and features)
Cargo
Cargo Space: Trunk space suitable for coupes of the era, folding rear seats for extended cargo.
Tire Size
Tire Specifications: Commonly 205/60R14 or 205/55R15 (verify with specific trim/options)
Wheel Bolt Pattern
Bolt Pattern: 5x100mm
Safety Features
Ratings
NHTSA Rating: Era-appropriate safety features; specific NHTSA ratings may not be readily available for this specific model year and variant.
Active Features
Active Safety: Anti-lock Braking System (ABS) optional on some trims.
Passive Features
Passive Safety: Three-point seatbelts, front crumple zones, reinforced passenger compartment, driver-side airbag (optional/standard on some trims).
Technology Features
Infotainment
Infotainment System: Factory original AM/FM stereo with cassette player, optional CD player. Manual details speaker replacement and head unit removal/installation.
Driver Assistance
Driver Assistance Features: Limited by era; primary driver assistance is the AWD system for enhanced traction.
Connectivity
Connectivity Features: No modern connectivity features (Bluetooth, USB). Manual covers basic antenna and wiring for aftermarket additions.
Maintenance
Service Intervals Oil
Oil Change Interval: Every 3,750 miles or 3 months (refer to manual for specific conditions)
Service Intervals Filters
Filter Replacement Intervals: Air filter: 15,000 miles or 12 months; Fuel filter: 30,000 miles (replace more frequently in dusty conditions).
Service Intervals Spark Plugs
Spark Plug Replacement: Every 30,000 miles (NGK, Denso, or equivalent recommended)
Service Intervals Coolant
Coolant Flush Interval: Every 30,000 miles or 24 months
Fluid Specifications Engine Oil
Engine Oil Type: SAE 10W-30 or 10W-40 API SG/SH (refer to manual for climate suitability)
Fluid Specifications Coolant
Coolant Type: Ethylene Glycol based coolant, 50/50 mix with distilled water
Fluid Specifications Brake Fluid
Brake Fluid Type: DOT 3 or DOT 4 brake fluid
Known Issues
Common Problems: Head gasket leaks (especially on EJ series, though less common on EA82T/ER27), turbocharger issues (on XT Turbo), suspension wear, electrical gremlins, AC system leaks (R-12),
Specific Issues: Dashboard cracking, window regulator failure, rust on common areas (wheel arches, sills).
Vehicle History
Brand Heritage
Subaru Heritage: Subaru, a division of Subaru Corporation (formerly Fuji Heavy Industries), has a long history of pioneering All-Wheel Drive technology, originating in aerospace. Known for its boxer engines and durable vehicles.
Model Evolution
Xt Evolution: The XT (Leone Coupe/Van in some markets) was introduced in 1985, with the XT6 variant featuring the unique 6-cylinder boxer engine. The 1991 model year represents the final iteration before production ended.
Production
Production Years: Subaru XT: 1985-1991; Subaru XT6: 1987-1991
Manufacturing Location
Location: Japan
Awards & Recognition
Recognitions
Automotive Awards: While specific awards for the 1991 XT/XT6 are not widely documented, Subaru's reputation for AWD and durability was well-established by this period. The XT was noted for its futuristic design for its time.
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