1986 Corolla SR5 Haynes Manual

The 1986 Toyota Corolla SR5 Haynes Manual provides comprehensive repair and maintenance information for the 1986 Corolla SR5 model. This manual covers engine systems, transmission, brakes, suspension, electrical systems, and routine maintenance procedures. Below are key sections for specifications, maintenance schedules, repair procedures, troubleshooting, and technical data.

1. Vehicle Specifications 2. Maintenance Schedules 3. Engine Repair Procedures 4. Transmission & Drivetrain 5. Brake Systems 6. Suspension & Steering 7. Electrical Systems 8. Heating & AC 9. Body & Interior 10. Troubleshooting Guide 11. Wiring Diagrams

Vehicle Specifications

Technical specifications for the 1986 Toyota Corolla SR5 including engine, dimensions, and performance data.

Specification	Details
Engine Type	1.6L 4A-C 4-cylinder
Horsepower	74 hp @ 4800 rpm
Torque	85 lb-ft @ 2800 rpm
Transmission	5-speed manual
Fuel System	2-barrel carburetor
Wheelbase	95.7 inches
Curb Weight	2150 lbs
Fuel Capacity	13.2 gallons
Brake System	Front disc/Rear drum
Tire Size	165 SR 13

Maintenance Schedules

Recommended maintenance intervals for optimal vehicle performance and longevity.

Oil Change: Every 3,000 miles or 3 months
Spark Plugs: Every 30,000 miles
Air Filter: Every 15,000 miles
Timing Belt: Every 60,000 miles
Brake Fluid: Every 2 years or 24,000 miles
Coolant Flush: Every 2 years or 30,000 miles

WARNING! Always use manufacturer-recommended fluids and parts. Failure to follow maintenance schedules may void warranty.

Engine Repair Procedures

Step-by-step instructions for common engine repairs and maintenance.

Spark Plug Replacement: Remove ignition wires, use spark plug socket to remove old plugs, gap new plugs to 0.031 inches
Valve Adjustment: Set engine to TDC compression stroke, adjust valves to 0.008 inches (cold)
Carburetor Adjustment: Set idle speed to 750 rpm, mixture screw 2.5 turns out from seated position
Timing Belt Replacement: Align timing marks, remove belt cover, install new belt with proper tension

CAUTION! Disconnect battery before performing electrical work. Allow engine to cool before servicing.

Transmission & Drivetrain

Transmission Type: 5-speed manual (C50)
Gear Ratios: 1st: 3.587, 2nd: 2.022, 3rd: 1.384, 4th: 1.000, 5th: 0.861
Final Drive: 4.300:1
Clutch Type: Single dry plate, diaphragm spring
Transmission Fluid: 75W-90 GL-4, 2.2 quarts capacity
Drive Axles: CV joint type, replace as complete assembly

Brake Systems

Brake system specifications and service procedures for front disc and rear drum brakes.

Front Brakes: Disc type, 9.0 inch diameter, minimum thickness 0.394 inches

Rear Brakes: Drum type, 7.87 inch diameter, maximum diameter 7.95 inches

Brake Pad Replacement: Remove caliper, compress piston, install new pads with shims. Brake Drum Service: Remove drum, inspect shoes for wear, adjust star wheel for proper clearance. Master Cylinder: Bench bleed before installation, check for leaks.

Suspension & Steering

Front MacPherson strut and rear leaf spring suspension system maintenance.

Strut Replacement: Support vehicle, remove strut mount nuts, compress spring before disassembly
Ball Joint Inspection: Check for play with pry bar, replace if movement exceeds 0.125 inches
Tie Rod Ends: Check for looseness, replace if any play detected
Wheel Alignment: Toe-in: 0 ± 0.08 inches, Camber: 0°45' ± 45'

Tip: Always use proper jack stands when working under vehicle.

Electrical Systems

Battery, charging, starting, and lighting system specifications and repair.

Battery: 12V, 45Ah, negative ground
Alternator: 45 amp output, adjust belt tension to 0.4-0.6 inches deflection
Starter: 1.0 kW, draw current 130-160 amps
Fuse Box: Located under dashboard, main fuses: 60A ALT, 40A AM1
Bulb Types: Headlight 60/55W H4, Brake light 21W, Turn signal 21W

WARNING! Disconnect battery before electrical repairs to prevent shorts and injury.

Heating & AC

HVAC system service and maintenance procedures.

Blower Motor Replacement: Remove glove box, disconnect wiring, remove mounting bolts. Heater Core: Drain coolant, remove dashboard components, replace leaking core. AC System: R-12 refrigerant, 1.76 lbs capacity, service ports on compressor.

Body & Interior

Body panel replacement, interior trim, and accessory installation.

CAUTION! Use proper safety equipment when working with glass and sharp edges.

Troubleshooting Guide

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel, spark, or compression issue	Check fuel delivery, spark plugs, compression test
Poor fuel economy	Dirty air filter, timing off	Replace air filter, check ignition timing
Brake pedal soft	Air in lines, worn pads	Bleed brake system, inspect pads/shoes
Overheating	Low coolant, thermostat stuck	Check coolant level, replace thermostat
Electrical issues	Bad ground, blown fuse	Check ground connections, inspect fuses

Reset: Disconnect battery for 10 minutes to reset ECU if applicable.

Service: Refer to Toyota dealership for complex electrical diagnostics

Wiring Diagrams

Complete electrical wiring diagrams for all systems including engine management, lighting, and accessories. Color-coded diagrams show wire colors, connector locations, and circuit paths for accurate diagnosis and repair.