Systems Covered:
Engine, Lubrication, Fuel, Cooling, Intake/Exhaust, Engine Electrical, Engine/Emission Control, Clutch, Manual Transaxle, Automatic Transaxle, Front Axle, Rear Axle, Wheels/Tires, Power Plant Mounts, Front Suspension, Rear Suspension, Service Brakes, Parking Brakes, Steering, Body, Exterior, Chassis Electrical, Component Locations, Configuration Diagrams, Splice Locations, Circuit Diagrams
Estimated Page Count:
Likely over 1000 pages, typical for a full service manual of this era.
Manual Type:
Factory Service Manual / Repair Manual
Engine Systems:
Detailed coverage of engine mechanicals, lubrication, fuel delivery (carburetor and early fuel injection systems depending on market), ignition, cooling, intake and exhaust systems, and emission controls.
Drivetrain Systems:
Comprehensive information on clutch operation, manual transaxle (gearbox) service and repair, automatic transaxle diagnosis and overhaul, front and rear axle assemblies, wheel bearings, and tire specifications.
Suspension Steering Brakes:
In-depth coverage of front and rear suspension components, steering system (hydraulic power steering likely), service brakes (disc/drum configurations), and parking brake mechanisms.
Body Chassis Electrical:
Detailed sections on bodywork, exterior components, interior trim, chassis electrical systems, component locations, wiring diagrams, splice locations, and configuration diagrams for various electrical circuits.
Maintenance Procedures:
Routine maintenance tasks such as oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt adjustments, and general inspection points.
Repair Procedures:
Step-by-step instructions for component disassembly, inspection, repair, and reassembly of all major vehicle systems, from engine rebuilds to brake caliper replacement.
Diagnostic Procedures:
Troubleshooting guides and diagnostic flowcharts for identifying common and uncommon faults across all systems, including engine performance issues and electrical gremlins.
Engine Repair Procedures:
Includes cylinder head removal/installation, piston and connecting rod service, crankshaft inspection, valve timing adjustment, and engine mounting adjustments.
Transmission Repair Procedures:
Covers clutch disc, pressure plate, and release bearing replacement; manual transaxle gear set inspection and repair; automatic transaxle hydraulic control system testing and rebuild; and final drive unit servicing.
Brake System Procedures:
Details brake pad and shoe replacement, rotor and drum machining/replacement, caliper and wheel cylinder overhaul, brake line inspection and replacement, and brake fluid bleeding procedures.
Electrical System Procedures:
Includes troubleshooting of starting and charging systems, ignition system diagnostics, lighting system repair, wiper and washer system servicing, and power window/lock system maintenance, with comprehensive circuit diagrams.
Depth Of Information:
Extensive technical detail suitable for professional mechanics, including precise torque specifications, clearances, diagnostic trouble codes (if applicable for the era), and detailed assembly instructions.
Illustration Quality:
Hundreds of photos and illustrations are mentioned, indicating clear visual guidance for disassembly, assembly, and identification of parts.
Torque Specifications:
Provides precise torque values for critical fasteners, ensuring correct assembly and preventing component damage.
Clearances And Tolerances:
Lists necessary clearances and tolerances for engine components (e.g., piston-to-cylinder wall, bearing clearances) and other mechanical assemblies.
Diagnostic Trouble Codes:
While OBD-I was emerging, specific diagnostic trouble code (DTC) coverage for this model might be limited or proprietary to Mitsubishi's diagnostic tools. However, the manual would provide methods for interpreting engine performance issues.
Engine Options 1990 Galant:
Likely included the 1.8L (4G37) SOHC and potentially the 2.0L (4G63) SOHC or DOHC engines, depending on market and trim level (e.g., GSR models often featured the 4G63). Some markets may have had a 1.6L option.
Horsepower Torque:
Varies by engine. The 1.8L typically produced around 86-90 hp, while the 2.0L SOHC could offer around 110-120 hp, and the 2.0L DOHC (like in GSR) could push past 140 hp. Specific figures would be detailed in the manual.
Fuel Delivery:
Covered likely includes both carburetor systems (on base models/markets) and early multi-point fuel injection (MPI) systems. The manual would detail fuel pump pressures, injector testing, and throttle body procedures.
Specific Engine Codes:
Commonly found engines include 4G37 (1.8L), 4G63 (2.0L SOHC and DOHC). The manual would differentiate procedures based on the specific engine variant.
Typical Maintenance Schedule:
The manual would detail intervals for oil changes (e.g., every 3,000-5,000 miles or 3-6 months), filter replacements, coolant flushes (e.g., every 2 years or 30,000 miles), timing belt replacement (crucial for interference engines like the 4G63, typically 60,000 miles), and brake fluid changes.
Engine Oil Type:
Likely specified API SG or SH rated oil, with viscosity grades such as 10W-30 or 5W-30 depending on climate. Specific capacities would be listed.
Coolant Type:
Would specify a green ethylene glycol-based coolant, typically a 50/50 mix with distilled water. Capacity for the cooling system would be provided.
Transmission Fluid Type:
For manual transmissions, gear oil specification (e.g., GL-4) and capacity. For automatic transmissions, likely Dexron-II or equivalent ATF and its capacity.
Power Steering Fluid:
Typically specified as Dexron-II or a specific Mitsubishi power steering fluid for models equipped with hydraulic power steering.
Brake Fluid Type:
DOT 3 brake fluid is the standard specification for vehicles of this era.
Common Galant E30 Problems:
Potential issues for this era include timing belt failure (if not replaced regularly on 4G63 engines), minor oil leaks from valve cover gaskets or oil pan seals, aging coolant hoses, and potential electrical gremlins due to harness degradation. Rust can also be a concern in certain climates.
Recommended Filters:
The manual would likely list OE part numbers or cross-references for commonly replaced filters like oil filters (e.g., MD069845 for some Mitsubishi applications), air filters, and fuel filters.
Mitsubishi Motors History:
Mitsubishi Motors Corporation has a long history in automotive manufacturing, known for engineering and performance, particularly in rally-inspired models like the Lancer Evolution, which shared engine technology with performance Galants.
Galant Lineage:
The 1990 Galant (E30 generation) represented a significant styling and engineering update over previous generations, featuring more aerodynamic lines and advanced technology for its time. It was a competitor in the popular mid-size sedan/coupe segment.
E30 Galant Production Years:
The E30 generation was produced from roughly 1987 to 1993, with the 1990 model year falling in the middle of its lifecycle, often with minor updates.
