Subaru Loyale 1989 Factory Service Manual – Selected Sections

Selected sections from Subaru’s 1989 factory service manual cover the Loyale/1800cc range in 4-Door Sedan, Station Wagon, Touring Wagon, and 3-Door form, including DL, GL, GL Turbo, GL-10, GL-10 Turbo, and RX Turbo configurations.

PDF Search, Bookmarks, and Page Count

Search and diagram detail: PDF text search is not available. Two embedded bookmarks open file parts at PDF pages 1 and 201; they do not provide chapter-by-chapter navigation. Small wiring labels and connector numbers require zooming.

One printable, English-language 362-page PDF, including two quick-reference covers, eleven section contents pages, two abbreviation pages, and six blank pages.

Engine Repair, Fuel-Injection Diagnosis, and Service Checks

The selected topics below preview the included material rather than reproduce the full contents list. Other topics include air-suspension diaphragm inspection and spark-plug deposit interpretation.

• Engine mechanical work: Timing-belt replacement and alignment, camshaft and rocker service, cylinder-head inspection, valve-guide replacement, crankcase separation, and cylinder-bore checks.

• Lubrication and cooling: Oil-pump disassembly and clearance inspection, relief-valve checks, water-pump service, thermostat testing, radiator inspection, and cooling-fan diagnosis.

• SPFI fault diagnosis: Self-diagnosis modes, trouble-code charts, connector terminal views, harness checks, starting-failure diagnosis, and throttle-chamber inspection and adjustment.

• MPFI turbo systems: Airflow-meter, injector and resistor tests, auxiliary-air-valve checks, pressure-regulator inspection, wastegate controls, and turbocharger fault diagnosis.

• Periodic chassis service: Brake bleeding and wear inspection, clutch/hill-holder adjustment, steering and suspension checks, wheel-bearing service, and transmission-fluid maintenance.

• Engine electrical repair: Separate starter procedures for manual and automatic transmissions, alternator testing and overhaul, distributor service, ignition-coil inspection, and wiring diagrams.

• Coverage limits: Selected factory sections; full transmission/differential, carburetor, exhaust, clutch, mounting, body-electrical, air-conditioning, and chassis-overhaul chapters are not included.

Suited to technicians and experienced mechanics who can use electrical test equipment and the specified engine-service tools.

Configuration Checks and Repair Limits

Vehicle-identification tables and label-location drawings support configuration checks before parts or procedures are selected. The drawings identify the VIN, engine and transmission serial numbers, certification plate, emissions labels, and color-code label.

Configuration tables distinguish FWD, selectable 4WD, and full-time 4WD, with single-range and dual-range manual transmissions and automatic options. Emissions and injection information separates California, 49-state, and Canadian applications; wiring references also distinguish automatic shoulder-belt configurations.

Incomplete engine sequence: The engine chapter skips printed pages 39–46 between PDF pages 178 and 179. This interrupts block reassembly and omits most of the dedicated crankshaft-and-piston service material. The file should not be used as a complete engine-rebuild reference.

Transmission specifications and fluid-service instructions remain included despite the absence of the full transmission-overhaul chapters.

Timing Belts, Cylinder Heads, and Block Work

The included step-by-step procedures extend to hydraulic lash-adjuster inspection, distributor indexing, valve-seat reconditioning, and valve-guide installation. Cylinder-block material includes piston-pin removal, bore measurements, piston-fit specifications, and crankshaft bearing data, subject to the missing procedures noted above.

The special-tool catalog supplies drawings, applications, and part numbers, including Flywheel Stopper CP 498277000, Drive Plate Stopper 498497000, Tensioner Wrench 499007000, Camshaft Sprocket Wrench 499207000, and oxygen-sensor socket 499990110.

The timing-belt procedures identify where the tensioner wrench can scratch the crankshaft and explain the precautions needed to prevent that damage.

Fuel Injection, Emissions, and Fuel Delivery

SPFI troubleshooting: U-check, read-memory, D-check, and clear-memory information is paired with connector pinouts and circuit charts. Starting-failure charts distinguish control-unit power and grounding faults from ignition-control and fuel-pump circuit problems, helping narrow the cause of a no-start condition.

MPFI scope: General troubleshooting tables, self-diagnosis operating information, and code lists are included. The later individual MPFI trouble-code charts referenced in those lists are outside this PDF. Turbocharger coverage addresses inspection and replacement; the turbocharger itself is not intended for internal disassembly or adjustment.

Emissions material covers PCV inspection, EGR valve and flow-passage checks, evaporative-emission components, and vacuum routing. Fuel-delivery procedures address the tank, fuel-level meter, filler pipe, separator, filter, pump, and delivery, return, and evaporation lines.

The manual warns that solvents can permanently damage the EGR diaphragm and that forcing a cold oxygen sensor can damage the exhaust pipe.

Oil-Pump and Cooling-System Diagnosis

Oil-pressure warning-light and gauge troubleshooting accompanies rotor-selection data, pump-clearance measurements, and relief-valve inspection. The Lubrication Lines diagram shows the relationship between the pump, crankshaft bearings, camshaft lubrication, hydraulic lash adjusters, and turbocharger supply.

Cooling coverage includes pressure-cap and leakage testing, pump mechanical-seal inspection, thermostat operation, thermometer testing, and fan-motor checks. Capacity and component data distinguish transmission, turbo, and regional configurations.

Starter, Alternator, and Wiring References

Starter chapters include magnetic-switch checks and no-load, load, and stall tests. Alternator coverage adds rotor, stator, brush, diode, and IC-regulator testing, while distributor material explains the photoelectric crank-angle sensor and permitted disassembly limits.

Diagram examples include the SPFI and MPFI system schematics, EGR Valve and EGR Flow Passages inspection chart, SPFI self-diagnosis flowcharts, and engine-electrical wiring diagrams for automatic shoulder-belt variants.

For under-vehicle work, use the designated lift and safety-stand points shown in the manual; the factory instructions specifically warn against working beneath a vehicle supported only by its jack.

Examples of Pump Clearances and Sensor Test Data

Oil-pump side-clearance data specifies a standard range of 0.05–0.16 mm and a limit of 0.18 mm. Rotor-height classifications and housing measurements accompany the inspection information.

The fuel-injection coolant thermosensor specification is 2–3 kΩ at a water temperature of 20°C (68°F). Its resistance table also provides cold and warmer test points for comparison.