1989 Subaru Leone, DL, GL, Loyale, RX & Isuzu Geminett II Factory Service Manual

• Covers 1989 U.S. and Canadian Subaru DL, GL, GL-10, and RX specifications for 4-door sedan, station wagon, Touring Wagon, and 3-door bodies, including FWD, selectable 4WD, and full-time 4WD configurations.
• Details EA82 SOHC flat-four engine repair, including timing-belt service, camshaft and rocker removal, cylinder-head and valve work, cylinder-block separation, crankshaft and piston inspection, and engine-noise troubleshooting.
• Separates SPFI and turbocharged MPFI service for the air-flow meter, throttle chamber or body, injectors, coolant sensor, pressure regulator, auxiliary-air valve, EGR, purge controls, and turbocharger system.
• Provides factory self-diagnosis and fault isolation for sensors, actuators, harnesses, connectors, CHECK ENGINE and monitor-lamp modes, trouble-code charts, and California/49-state or MT/AT system differences.
• Covers lubrication, cooling, fuel, and engine-electrical work on the oil and water pumps, thermostat, radiator and fan, fuel tank and pump, starter, alternator, distributor, ignition coil, and spark plugs.
• 362-page PDF — General: 112 pages; Engine: 211 pages; Electrical: 39 pages — with service data, torque tables, capacities, wear limits, adjustment values, special-tool listings, exploded views, schematics, and wiring diagrams.

This manual is built around Subaru's 1989 model tables rather than blanket coverage for every vehicle sold from 1984 through 1994. The tables distinguish SPFI and turbo MPFI engines, manual and automatic transmissions, FWD and several 4WD arrangements, and U.S., Canadian, California, 49-state, and selected Puerto Rico specifications. Its repair depth is suited to professional technicians and experienced owners who already understand engine teardown and electrical meter testing; it is not written as introductory automotive instruction.

Engine Repair and On-Car Testing

The on-car service material covers ignition timing, compression and intake-manifold vacuum tests, idle speed and mixture adjustment, oxygen-sensor checks, turbocharger checks, cooling-system pressure testing, high-tension cords, cylinder-head bolt service, and oil- and water-pump work. The main engine chapter goes further into timing belts and covers, camshafts and valve rockers, cylinder heads, valves and springs, the split crankcase, crankshaft, pistons, and connecting rods. Inspection limits, fitting data, clearances, tightening sequences, and troubleshooting charts support the mechanical repair procedures without turning the publication into a simple tune-up guide.

Separate fuel-injection sections explain how the SPFI and MPFI systems operate before moving into component testing and repair. The coverage includes the hot-wire air-flow meter, throttle components, air-control or auxiliary-air valves, fuel injectors and resistor, pressure regulation, coolant sensing, crank-angle and throttle inputs, wastegate control, and related harnesses. Self-diagnosis material documents U-check, read-memory, D-check, and clear-memory modes, then ties trouble codes to circuit tests and symptom charts for hard starting, stalling, poor idle, hesitation, lack of power, and excessive fuel consumption.

General Service and Electrical Reference

The General section supplies VIN decoding and identification-label locations, approved fuels, lubricants, sealants, standard-fastener torque tables, and factory lifting, towing, and tie-down points. Its scheduled-service chapter reaches beyond the engine to transmission and differential lubricants, ATF, disc and drum brake inspection, clutch and hill-holder adjustment, steering and suspension checks, axle boots, and wheel-bearing service. These are inspection and maintenance procedures, not complete chassis overhaul chapters.

The illustrated special-tool catalog identifies Subaru tools by number. Engine-related examples include Piston Pin Remover ASSY 399094310, Tensioner Wrench 499007000, Engine Stand 499817000, and Oxygen Sensor Socket 499990110. The engine-electrical pages cover separate MT and AT starter designs, alternator output and diode/regulator testing, distributor and crank-angle-sensor inspection, ignition-coil checks, and spark-plug diagnosis, with disassembly, inspection, assembly, and installation details where provided.

Diagrams, Repair Cautions, and Scope

Named illustration sets include the SPFI and MPFI Turbo emission-control schematics, engine lubrication lines, cooling-system flow views, cylinder-block and timing-belt exploded views, MT/AT starter assemblies, and SPFI/MPFI self-diagnosis wiring diagrams. Component-specific troubleshooting tables connect those drawings to actual test points rather than using them only as parts illustrations.

The factory cautions matter during electronic and turbo repair. Reversed battery polarity can destroy the SPFI or MPFI control unit and damage the injector circuit, while dirt entering an open turbocharger can damage the turbine or compressor blades as soon as the engine runs. The water-pump section also warns that pressing on the shaft instead of the bearing outer race can damage the bearings.

This PDF does not include the full manual- or automatic-transmission and differential repair chapters referenced in the opening index. The carburetor, exhaust, clutch, and engine/transmission mounting chapters are also absent, and the electrical portion is limited to engine electrical service plus the included SPFI/MPFI diagrams rather than the complete body-electrical volume. Follow the manual's safety precautions when lifting a 4WD vehicle, opening a hot cooling system, releasing fuel pressure, or performing powered bench tests.