🏷️ Basic Information Identification Make: Holden Model: HQ, HJ, HX, HZ Body Styles: Sedan, Station Wagon, Coupe (Monaro), Commercial (Ute, Panel Van) Production Period: 1971-1980 (HQ: 1971-1974, HJ: 1974-1976, HX: 1976-1977, HZ: 1977-1980) 👋 Introduction Market Position Target Audience: Holden HQ, HJ, HX, HZ owners, enthusiasts, mechanics, restorers, DIYers. Key Features Completeness: 100% complete and intact; no missing or corrupt pages/sections. Content Type: Detailed illustrations, exploded diagrams, drawings, photos, step-by-step instructions. Value Proposition Cost Savings: Inexpensive way to keep vehicle working properly; empowers DIY repairs to save money. 📋 Manual Details Coverage Areas General: Complete service and repair for Holden HQ, HJ, HX, and HZ models. Engines: All factory-fitted engine options across the HQ-HZ range. Page Count Total Pages: >3000 Manual Type Type: Service and Repair Manual Language Language: English Format File Format: PDF (Download) 📖 Manual Coverage Systems Covered Engine Mechanical: Engine overhaul and rebuilding, performance tuning, timing belt replacement (where applicable), firing orders, specifications. Brakes: Brake servicing procedures, diagnostics, front-end alignment, specifications, torque values. Suspension Steering: Front end and alignment procedures and specifications, suspension systems, U-joint and CV-joint service. Transmission: Transmission removal and installation, in-car servicing, features. Electrical Electronics: Wiring diagrams, computer diagnostic trouble tree charts, computer diagnostic codes, troubleshooting, vacuum diagrams. Climate Control: Air conditioning service and capacities. Body Chassis: Sunroof service, body repair and refurbishment guidance. Fuel System: Fuel tank, pump, lines, and carburetor service and troubleshooting. Cooling System: Radiator, fan, water pump, thermostat, and heater core service. Exhaust System: Manifolds, pipes, mufflers, and catalytic converter (if fitted) service. Ignition System: Distributor, coil, spark plugs, and wiring service. Interior Trim: While not a primary focus, procedures for accessing components behind trim are often included within system repairs. Procedures Included Maintenance: Factory maintenance schedules and charts, routine servicing. Diagnostics: Troubleshooting and diagnostics, computer diagnostic trouble tree charts, computer diagnostic codes. Repair Rebuild: Engine overhaul and rebuilding, complete disassembly, step-by-step instructions for all repair procedures. Specifications: Detailed specifications on every model, complete torque specifications, alignment specifications, fluid capacities. Driving Concerns: Includes sections addressing common driving concerns and their resolutions. Troubleshooting: Systematic troubleshooting guides for common problems. Part Replacement: Step-by-step instructions for replacing all major components. Technical Depth Depth: Comprehensive, from basic maintenance to complete engine rebuilds and advanced diagnostics. Suitable for DIY and professional mechanics. Illustrations: Hundreds of detailed illustrations, exploded diagrams, and photographs. Diagnostics Charts: Computer diagnostic trouble tree charts and computer diagnostic codes for troubleshooting electronic issues of the period. Specifications Details: Precise torque values for critical fasteners, engine clearances, bearing clearances, etc. 📊 Manual Specifications File Format Format: PDF Readability: Searchable and bookmarkable for easy navigation. Print Quality Printability: Fully printable pages. Binding Type Binding: Digital (Download) - No physical binding. Paper Type Paper Type: N/A (Digital File) Software Requirements Viewer: Adobe PDF Reader Decompression: WinZip (or similar unzipping utility) Compatibility Operating Systems: All Windows versions, macOS, iOS (iPhone, iPad), Android. Features Zoom: Yes (Zoom In/Out) Delivery Method: Instant Download ⚙️ Engine Specifications Primary Engine Engine Options: Inline-6 (e.g., 173ci, 186ci, 202ci), V8 (e.g., 253ci, 308ci, 350ci - '74 HQ SS, later models). Fuel System Carburetion: Single-barrel and multi-barrel carburetors (e.g., Stromberg, Holley, Rochester Quadrajet). Performance Notes: Performance data varies significantly by engine option and tuning; manual covers all factory specifications and rebuild procedures. 🔧 Transmission Standard Manual: 3-speed and 4-speed manual transmissions. Optional Automatic: 2-speed Powerglide (early HQ), 3-speed Turbo-Hydramatic (e.g., TH350, TH400). Features Clutch Service: Procedures for clutch inspection, replacement, and adjustment. 📐 Dimensions Exterior Wheelbase: Varies by body style (e.g., ~108-114 inches for sedans/wagons, ~100 inches for coupes). Weights Curb Weight: Varies by body style and engine (e.g., ~2600-3400 lbs). 🛡️ Safety Features Passive Features Restraints: Lap-sash seat belts (front and rear, depending on configuration and model year). Active Features Braking System: Front disc brakes, rear drum brakes; optional power assistance and front ventilated discs on performance models. 💡 Technology Features Infotainment Audio: Factory radio units (AM/FM, cassette players in later models); manual details electrical connections. Driver Assistance Features: Basic features for the era; focus is on mechanical and electrical systems rather than advanced driver aids. 🔧 Maintenance Service Intervals General: Manual includes factory maintenance schedules and charts for various intervals (e.g., oil changes, filter replacements, lubrication). Fluid Specifications Engine Oil: Specify SAE viscosity grades (e.g., SAE 20W-50, SAE 10W-30 depending on climate and engine) and API service classifications. Coolant: Type and mixture ratio for the cooling system. Transmission Fluid: Dexron or equivalent for automatic transmissions, GL-4 or GL-5 for manual transmissions and differentials (specific grades provided in manual). Known Issues Common Wear Items: Carburetor tuning, ignition system components, fuel pumps, U-joints, suspension bushings, rust (common for vehicles of this age). 📚 Vehicle History Brand Heritage Manufacturer: Holden (Australian division of General Motors). Model Evolution Lineage: Successor to the Holden HG series, predecessor to the Holden HZ (though HZ is covered, it's...