Acura Integra 89 Service Manual

The Acura Integra 1989 is a compact sports sedan featuring a 1.6L DOHC 16-valve four-cylinder engine, front-wheel drive, 5-speed manual transmission, double wishbone suspension, power-assisted rack-and-pinion steering, front disc/rear drum brakes, and comprehensive electronic systems. This service manual covers maintenance procedures, troubleshooting, specifications, and repair guidelines for proper vehicle upkeep.

Vehicle Specifications

Key technical data for the 1989 Acura Integra model.

Maintenance Schedule

Recommended service intervals for optimal performance.

1. Oil Change: Every 3,000 miles or 3 months
2. Oil Filter: Replace with every oil change
3. Air Filter: Inspect every 15,000 miles, replace as needed
4. Spark Plugs: Replace every 30,000 miles
5. Timing Belt: Replace every 60,000 miles
6. Coolant Flush: Every 30,000 miles or 2 years
7. Brake Fluid: Replace every 2 years

WARNING! Always use genuine Acura parts for replacement. Follow torque specifications precisely.

Engine System

Service procedures for the 1.6L DOHC engine.

1. Valve Adjustment: Check every 15,000 miles, adjust to 0.009-0.011 in (intake), 0.010-0.012 in (exhaust)
2. Timing Belt: Align marks with crankshaft and camshaft sprockets
3. Compression Test: Should read 135-185 psi, variation less than 15 psi between cylinders
4. Oil Pressure: 50-65 psi at 3000 rpm when warm

CAUTION! Engine must be cool before performing maintenance. Use proper safety equipment.

Transmission

• Type: 5-speed manual transaxle
• Gear Ratios: 1st: 3.250, 2nd: 1.900, 3rd: 1.250, 4th: 0.909, 5th: 0.702, Reverse: 3.153
• Final Drive: 4.266:1
• Fluid Capacity: 2.2 US quarts Honda MTF
• Shift Pattern: Standard H-pattern with reverse left and up
• Clutch: Single dry plate, hydraulic operation

Braking System

Front disc brakes with rear drum configuration.

Front Brakes: Ventilated discs, 9.8 inch diameter, single-piston floating calipers

Rear Brakes: Drum brakes, 7.9 inch diameter, self-adjusting

Brake Fluid: DOT 3 or DOT 4. Pad Replacement: Minimum thickness 0.12 inch. Rotor Runout: Maximum 0.004 inch. Drum Diameter: Maximum 7.91 inch when machined.

Suspension & Steering

Double wishbone front suspension with rear dual-link setup.

1. Front Suspension: Double wishbone with coil springs, stabilizer bar
2. Rear Suspension: Dual-link with trailing arms, coil springs
3. Steering: Power-assisted rack-and-pinion, 2.8 turns lock-to-lock
4. Wheel Alignment: Front toe-in 0 ± 1/8 inch, camber -0°30' ± 45'

Tip: Check ball joints and tie rod ends during routine maintenance.

Electrical System

12-volt negative ground system with alternator and battery.

1. Battery: 12V 45Ah, negative ground
2. Alternator: 70 amp output
3. Starter: 1.4 kW reduction gear type
4. Fuse Box: Located under dashboard, additional fuses in engine compartment
5. Spark Plug Gap: 0.039-0.043 inch
6. Ignition Timing: 16° BTDC at 800 rpm with vacuum advance disconnected

WARNING! Disconnect battery before electrical work. Avoid short circuits.

Fuel System

Multi-point fuel injection with electric fuel pump.

Fuel Pressure: 35-40 psi with vacuum hose disconnected. Injector Resistance: 1.5-2.5 ohms. Fuel Filter: Replace every 30,000 miles. Fuel Pump: In-tank electric type, 90+ psi capacity.

Cooling System

Pressurized cooling system with thermostat and radiator.

Coolant Capacity: 5.8 US quarts (with heater). Thermostat: Opens at 180°F (82°C). Radiator Cap Pressure: 13-15 psi. Cooling Fan: Electric, thermostatically controlled.

Troubleshooting Guide

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

Service: Contact Acura dealer or certified technician for complex repairs.