Engine Mechanical:
Engine overhaul, cylinder head, block assembly, pistons, crankshaft, camshaft, timing belt/chain, lubrication system, cooling system, fuel injection system (MPI), emission control systems.
Engine Electrical:
Ignition system, starter motor, alternator, battery, electronic control unit (ECU) diagnostics and component testing, sensor identification and testing (crankshaft position, camshaft position, throttle position, oxygen, etc.).
Transmission Manual:
Clutch system, manual transmission overhaul, gear shift mechanism, transfer case overhaul, front and rear driveshafts, differentials.
Transmission Automatic:
Automatic transmission overhaul, hydraulic control system, torque converter, electronic controls (if equipped), transmission fluid and filter replacement procedures.
Suspension And Steering:
Front and rear independent suspension (e.g., double wishbone), shock absorbers, springs, control arms, ball joints, steering linkage, power steering system, steering gear box/rack and pinion.
Brakes:
Front and rear disc/drum brake systems, hydraulic lines, master cylinder, brake booster, ABS (Anti-lock Braking System) components and diagnostics, parking brake system.
Electrical System:
Wiring diagrams for all major systems, lighting (headlights, taillights, interior), power windows, power locks, mirrors, horn, wipers, washers, instrument cluster, charging system, starting system, fuse and relay locations.
HVAC:
Heating, ventilation, and air conditioning (HVAC) system components, compressor, evaporator, condenser, refrigerant charging, blower motor, climate control panel.
Body And Chassis:
Body panel removal/installation, door mechanisms, glass replacement, interior trim, seat removal, frame straightening (if applicable), rust prevention, underbody coatings.
Safety Systems:
Seat belts, airbag system (if equipped, though less common for early 90s), chassis integrity.
Preventative Maintenance:
Scheduled maintenance intervals for oil changes, filter replacements, fluid checks and changes, brake inspections, tire rotations.
Routine Repairs:
Replacement of common wear items such as spark plugs, belts, hoses, brake pads/rotors, battery, bulbs, wiper blades.
Engine Overhaul And Rebuild:
Detailed step-by-step instructions for complete engine disassembly, inspection, repair, and reassembly, including torque specifications and clearances.
Transmission Service And Rebuild:
Procedures for transmission fluid and filter changes, clutch replacement, automatic transmission internal component replacement, and full rebuild instructions.
Drivetrain Service:
Service and repair of transfer cases, differentials, CV joints, U-joints, and driveshafts.
Brake System Service:
Bleeding brake systems, replacing brake pads, rotors, calipers, master cylinder, and ABS component diagnostics and replacement.
Suspension And Steering Repair:
Replacement of shocks, struts, ball joints, tie rod ends, bushings, and steering components.
Electrical Diagnostics And Repair:
Troubleshooting electrical faults using wiring diagrams, testing circuits, diagnosing sensor and actuator issues, and replacing electrical components.
HVAC System Repair:
Refrigerant system charging, leak detection, component replacement (compressor, drier, expansion valve), and blower motor/heater core service.
Bodywork And Interior Trim:
Removal and installation of body panels, doors, bumpers, glass, and interior trim components.
Troubleshooting Guides:
Diagnostic flowcharts and symptom-based troubleshooting for common mechanical, electrical, and driveability issues.
Specifications And Tolerances:
Detailed torque specifications, engine clearances, bearing tolerances, and adjustment procedures.
Depth:
Comprehensive (covers routine maintenance to full engine and transmission rebuilds, including detailed diagnostics and electrical troubleshooting).
Diagnostic Capabilities:
Detailed diagnostics for engine control, transmission control, and ABS systems, including fault codes and test procedures where applicable.
Diagrams And Illustrations:
Includes numerous exploded views, schematics, wiring diagrams, and step-by-step illustrations for clarity.
Oil Change Miles:
Every 3,000 - 5,000 miles (recommended)
Engine Coolant Change Miles:
Every 30,000 miles or 2 years
Transmission Fluid Change Miles:
Every 30,000 - 50,000 miles (manual and automatic)
Timing Belt Replacement Miles:
Every 60,000 miles (critical for 6G72 SOHC engine to prevent catastrophic damage)
Engine Oil Type:
API SG or higher, SAE 10W-30 or 10W-40 (check manual for exact viscosity based on climate)
Engine Oil Capacity Quarts:
Approx. 4.7 quarts (with filter)
Automatic Transmission Fluid Type:
Dexron II or III (or equivalent)
Manual Transmission Fluid Type:
API GL-4, SAE 75W-90 or 80W-90 gear oil
Transfer Case Fluid Type:
API GL-4, SAE 75W-90 or 80W-90 gear oil
Differential Fluid Type:
API GL-5, SAE 80W-90 gear oil
Power Steering Fluid Type:
Dexron II or III (or equivalent)
Timing Belt Failure:
Critical to replace on schedule (60k miles) as the 6G72 is an interference engine. Belt failure leads to piston-to-valve contact and severe engine damage.
Rear Main Seal Leaks:
Common for the crankshaft rear main seal to develop leaks over time.
Head Gaskets:
While not as prone as some other engines, head gasket leaks can occur, particularly with age and high mileage.
Suspension Bushings:
Rubber bushings in the suspension and steering components can wear out, leading to clunking noises, sloppy handling, and alignment issues.
ABS Sensors:
ABS wheel speed sensors can fail, causing the ABS warning light to illuminate and disabling the ABS functionality.
Exhaust Manifold Cracks:
Exhaust manifolds can develop cracks due to thermal cycling.