Target Audience:
DIY mechanics, restorers, Holden enthusiasts, and professional workshops.
Advantage Over Alternatives:
Provides a single, comprehensive digital resource covering the entire HQ-HZ generation, unlike scattered official bulletins or older printed manuals.
Ease Of Use:
Step-by-step instructions and clear imagery make complex repairs accessible.
Cost Savings:
Enables significant savings on labour costs by empowering owners to perform their own maintenance and repairs.
Accessibility:
Downloadable to various devices (PC, Mac, tablet, smartphone) for convenient reference.
Lifetime Access:
Once downloaded, the manual is owned permanently by the user.
Overall Coverage:
All models, engines, trim levels, and transmission types within the HQ-HZ series.
Engine Coverage:
Six-cylinder (Red, Blue, Black) and V8 (920, 253, 308, 350, 427) engine variants.
Transmission Coverage:
Manual (3-speed, 4-speed) and Automatic (2-speed, 3-speed Trimatic) transmissions.
Estimated Page Count:
Comprehensive (specific number not provided, implies extensive coverage A-Z).
Manual Classification:
Workshop Service Repair Manual
Language Of Manual:
English
Digital Format:
PDF (requires Adobe Reader)
Engine Mechanical:
Engine assembly, cylinder heads, blocks, pistons, crankshafts, camshafts, timing, lubrication systems, cooling systems, fuel delivery systems.
Engine Fuel System:
Carburettor overhaul (Stromberg, Rochester Quadrajet, Holley), fuel pumps, fuel lines, fuel tanks.
Transmission Drivetrain:
Manual gearbox repair, clutch replacement, automatic transmission service (Trimatic), driveshafts, differentials, axles.
Suspension Steering:
Front and rear suspension components, shock absorbers, springs, bushings, steering box, power steering systems, tie rods, ball joints.
Brakes:
Brake system diagnostics, hydraulic systems, master cylinders, wheel cylinders, brake shoes, brake pads, disc brake systems, drum brake systems, parking brake.
Electrical System:
Ignition systems, starting systems, charging systems (alternators, generators), batteries, lighting systems, wiring diagrams, instrumentation.
Body Chassis:
Body panel removal and installation, rust repair, interior trim, exterior trim, doors, windows, seats, chassis lubrication.
Heating Ventilation Air Conditioning:
Heater core service, blower motor, ducting, (limited AC coverage likely for period).
Routine Maintenance:
Oil changes, filter replacements, fluid level checks, tune-ups, spark plug replacement, belt adjustments.
Major Repairs:
Engine overhauls, transmission rebuilds, brake system overhauls, suspension component replacement, differential rebuilds.
Troubleshooting:
Diagnostic procedures for common and uncommon faults across all systems.
Component Removal Installation:
Step-by-step guides for removing and refitting all major and minor components.
Specifications Data:
Torque specifications, clearances, fluid capacities, electrical specifications, timing settings.
Depth Of Information:
Comprehensive, covering basic maintenance to complete engine and transmission rebuilds. Includes detailed diagrams and illustrations.
Common Six Cylinder Engines:
173 cu in (2.8L), 186 cu in (3.0L), 202 cu in (3.3L) - Red, Blue, and Black series.
Common V8 Engines:
253 cu in (4.2L), 308 cu in (5.0L), 350 cu in (5.7L), 427 cu in (7.0L) - Chevrolet sourced for some models.
Horsepower Range:
Varies significantly by engine, from approx. 114 hp (173ci) to over 300 hp (350ci HO, 427ci).
Torque Range:
Varies significantly by engine, from approx. 170 lb-ft (173ci) to over 400 lb-ft (427ci).
Carburettor Types:
Single barrel (Stromberg), Twin barrel (Stromberg, Rochester), Four barrel (Rochester Quadrajet, Holley).
Fuel Type:
Unleaded petrol (later models), Leaded petrol (early models).
Standard Transmission Options:
3-speed manual, 4-speed manual.
Optional Transmission Options:
2-speed Powerglide (early HQ), 3-speed Trimatic automatic (HQ, HJ, HX, HZ).
Clutch Type:
Single dry plate diaphragm type (manual).
Automatic Transmission Details:
Trimatic TH350/TH400 based, requiring specific fluid and service procedures.
Historical Safety Standards:
Reflects safety standards of the 1970s. Features like seatbelts (front standard, rear optional depending on year/model), padded dashboards, collapsible steering columns.
Braking System:
Front disc brakes standard on most models, rear drum brakes. Power assistance often optional or standard on higher trims/V8s.
Restraint Systems:
Lap-diagonal seat belts (front), lap belts (rear, often optional).
Oil Change Interval:
Typically 5,000 km or 3,000 miles (depending on oil type and driving conditions).
Tune Up Interval:
Recommended at 10,000-15,000 km (6,000-9,000 miles) for spark plugs, points, and condenser check.
Engine Oil Type:
API SF/SG or equivalent (e.g., 20W-50, 10W-30 depending on climate and engine condition).
Coolant Type:
Ethylene glycol based anti-freeze and anti-boil solution mixed with distilled water (50/50 ratio).
Transmission Fluid Manual:
GL-5 gear oil (e.g., 80W-90).
Transmission Fluid Automatic:
Dexron II or equivalent (for Trimatic).
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid.
Common Rust Areas:
Wheel arches, sills, door bottoms, lower body panels, rear quarter panels, chassis rails.
Engine Wear Points:
Piston rings, valve guides, main bearings, oil pump (especially on higher mileage engines).
Suspension Wear:
Ball joints, tie rod ends, control arm bushings, idler arm bushings, shock absorber degradation.
Electrical Faults:
Wiring loom degradation, faulty voltage regulators, starter motor issues, corroded connections.
