The 1986 Jeep CJ7 Shop Manual provides comprehensive technical information for maintenance, repair, and service procedures. This manual covers the 2.5L 4-cylinder and 4.2L 6-cylinder engines, manual and automatic transmissions, transfer cases, axles, steering, suspension, brakes, electrical systems, and body components. Below are key sections for specifications, maintenance schedules, troubleshooting, and repair procedures.
Technical specifications for 1986 Jeep CJ7 models including engine options, dimensions, capacities, and performance data.
| Specification | Description |
|---|---|
| Engine Options | 2.5L 4-cylinder, 4.2L 6-cylinder |
| Transmission | 4-speed manual, 3-speed automatic |
| Transfer Case | Dana 300, part-time 4WD |
| Wheelbase | 93.5 inches |
| Overall Length | 152.3 inches |
| Fuel Capacity | 15.5 gallons |
| Gross Vehicle Weight | 4,100 lbs |
| Tire Size | P205/75R15 (standard) |
| Axle Ratios | 2.73:1, 3.31:1, 3.73:1 |
| Turning Radius | 34.5 feet |
Recommended maintenance intervals for optimal performance and longevity.
WARNING! Always use recommended fluids and follow safety procedures when working under vehicle.
Service procedures for 2.5L and 4.2L engines including tune-up specifications and repair guidelines.
CAUTION! Always disconnect battery before working on electrical components.
Leaf spring suspension with recirculating ball steering gear.
Front Suspension: Multi-leaf springs, 11.5" length, telescopic shock absorbers
Rear Suspension: Multi-leaf springs, 22" length, telescopic shock absorbers
Steering Gear: Saginaw recirculating ball, 24:1 ratio, 4.5 turns lock-to-lock
Alignment Specs: Caster +3° to +7°, Camber +1/4° to +3/4°, Toe-in 1/8" to 1/4"
Dual-circuit hydraulic system with front disc and rear drum brakes.
Tip: Always bleed brakes starting from farthest wheel from master cylinder.
12-volt negative ground system with 60-amp alternator.
WARNING! Disconnect battery before servicing electrical systems to prevent shorts.
Steel body with removable doors and fold-down windshield.
Common problems and diagnostic procedures for quick identification of issues.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine won't start | Fuel, spark, or compression issue | Check fuel delivery, spark plugs, compression test |
| Hard shifting | Low fluid, linkage adjustment | Check transmission fluid level, adjust shift linkage |
| Steering wander | Worn components, alignment | Inspect tie rods, ball joints, check alignment |
| Brake pull | Stuck caliper, contaminated pads | Clean and lubricate slides, replace pads |
| Electrical issues | Ground connections, battery | Clean battery terminals, check ground straps |
Critical fasteners and their required torque values.
| Component | Torque Value |
|---|---|
| Cylinder head bolts | 65-75 ft-lbs (warm engine) |
| Main bearing caps | 80-85 ft-lbs |
| Rod bearing caps | 40-45 ft-lbs |
| Flywheel bolts | 55-65 ft-lbs |
| Wheel lug nuts | 85-95 ft-lbs |
| Spark plugs | 15-20 ft-lbs |
| Oil pan bolts | 7-9 ft-lbs |
| Differential cover | 20-25 ft-lbs |
Complete electrical schematics for charging, starting, lighting, and accessory systems.
Color Codes: BLK-Black, WHT-White, RED-Red, YEL-Yellow, BLU-Blue, GRN-Green, BRN-Brown, ORN-Orange, PPL-Purple, GRY-Gray
Circuit Protection: 14-gauge primary wires, 16-gauge secondary, fusible links at battery
Ground Locations: Engine block, firewall, frame rails, instrument panel
Service: For technical support contact Jeep customer service or authorized dealers