Engine Mechanical:
Complete engine overhaul, including cylinder head, block, pistons, rings, crankshaft, camshaft, valve train, timing systems
Engine Fuel System:
Fuel delivery, injection system (EFI), fuel pump, injectors, fuel filter replacement, fuel lines
Engine Ignition System:
Ignition timing, spark plugs, wires, distributor (if applicable), ignition coil, electronic control unit (ECU)
Cooling System:
Radiator, water pump, thermostat, hoses, cooling fan operation, coolant types and capacities
Exhaust System:
Exhaust manifolds, catalytic converter, mufflers, pipes, hangers, emissions controls
Transmission Manual:
Clutch operation, gearbox overhaul, shifting mechanisms, clutch fluid, torque specifications
Transmission Automatic:
Automatic transmission disassembly, assembly, hydraulic system, torque converter, transmission fluid specifications and service
Drivetrain:
Driveshaft, universal joints, rear axle assembly, differential, axle bearings, seals
Suspension Front:
Independent front suspension, control arms, ball joints, tie rods, springs, shock absorbers, alignment procedures
Suspension Rear:
Leaf spring suspension (typical for trucks of this era), U-bolts, shackles, shock absorbers
Steering System:
Power steering pump, steering gear, steering linkage, steering column, steering wheel removal
Brake System Front:
Front disc brake components, calipers, pads, rotors, brake fluid specifications and bleeding procedures
Brake System Rear:
Rear drum brake components, shoes, drums, wheel cylinders, parking brake mechanism
Electrical System Charging:
Alternator, voltage regulator, battery service and testing
Electrical System Starting:
Starter motor, starter solenoid, ignition switch
Electrical System Lighting:
Headlights, taillights, turn signals, interior lighting, bulb replacement
Electrical System Accessories:
Wipers, horn, power windows, power locks, radio, HVAC controls
Body Exterior:
Body panel repair, door mechanisms, latches, hinges, bumpers, glass replacement, trim removal
Body Interior:
Dashboard removal, seat removal, carpet replacement, headliner, interior trim components
HVAC System:
Heating, ventilation, and air conditioning (HVAC) system diagnosis and repair, blower motor, heater core, A/C components
Wiring Diagrams:
Detailed electrical wiring diagrams for all major systems
Maintenance Tasks:
Oil changes, filter replacements, fluid checks and changes, lubrication, tune-ups, belt and hose replacement
Troubleshooting Guides:
Step-by-step diagnostic procedures for common and complex problems
Repair Procedures:
Detailed instructions for component removal, installation, and repair
Rebuilding Instructions:
Complete rebuild procedures for engines, transmissions, and major components
Specifications Torque:
Torque specifications for all critical fasteners and components
Alignment Procedures:
Front and rear wheel alignment specifications and adjustment procedures
Diagnostic Charts:
Diagnostic flowcharts for electrical and mechanical issues
Special Tool Requirements:
Identification of special tools required for specific repair procedures
Depth:
Factory-level detail, covering everything from basic maintenance to complete engine and transmission overhauls
Target Audience:
Professional mechanics, experienced DIY enthusiasts, and restoration specialists
Engine Code:
2.5L (150 cu in) Slant-Four (4-150)
Configuration:
Inline-4, Slant-Six configuration (angled engine for lower hood line)
Bore X Stroke:
3.89 in x 3.31 in (99.0 mm x 84.1 mm)
Compression Ratio:
8.8:1 (approx.)
Horsepower Net Hp:
105 hp @ 4800 rpm (approx.)
Torque Net Lb Ft:
130 lb-ft @ 2800 rpm (approx.)
Engine Code:
3.9L (239 cu in) V6 (6-239)
Configuration:
90-degree V6
Bore X Stroke:
3.62 in x 3.80 in (92.0 mm x 96.5 mm)
Compression Ratio:
8.9:1 (approx.)
Horsepower Net Hp:
125 hp @ 4000 rpm (approx.)
Torque Net Lb Ft:
180 lb-ft @ 2400 rpm (approx.)
Induction System:
Electronic Fuel Injection (EFI)
Fuel Type:
Unleaded gasoline
Capacity Quarts 2.5L:
5.0 (with filter)
Capacity Quarts 3.9L:
5.5 (with filter)
Coolant Capacity Quarts 2.5L:
10.0 (with heater)
Coolant Capacity Quarts 3.9L:
11.5 (with heater)
Recommendation 2.5L:
Champion RC12LYC or equivalent
Recommendation 3.9L:
Champion RC14LYC or equivalent
Static Base Timing 2.5L:
10 degrees BTDC (adjust with vacuum hose disconnected)
Static Base Timing 3.9L:
10 degrees BTDC (adjust with vacuum hose disconnected)
Oil Change Interval:
Every 3,000 miles or 3 months (typical recommendation)
Air Filter Replacement:
Every 15,000 miles or 12 months
Fuel Filter Replacement:
Every 30,000 miles (or as per manual)
Spark Plug Replacement:
Every 30,000 miles
Transmission Fluid Change Auto:
Every 30,000 - 60,000 miles (depending on use)
Transmission Fluid Change Manual:
Every 60,000 miles
Coolant Flush:
Every 30,000 miles or 24 months
Engine Oil Type:
API SF or SG, SAE 10W-30 (preferred for most temperatures)
Power Steering Fluid Type:
ATF+2 or equivalent
Common Problems:
Radiator leaks, starter motor issues, exhaust manifold cracks (on V6), minor electrical gremlins, clutch wear (on manual transmissions), rust on body panels and frame rails
Diagnostic Tip Engine Performance:
Check fuel pressure, spark plug condition, and for vacuum leaks if engine is rough or lacks power.
Diagnostic Tip Transmission:
Ensure proper fluid level and condition for automatic transmissions; listen for bearing noise in manual transmissions.