This manual covers the HQ, HJ, HX, and HZ models, produced between 1971 and 1980. These iconic Australian vehicles were available in various body styles, including Sedan, Station Wagon, Coupe (Monaro), and Commercial variants like the Ute and Panel Van. Renowned for their robust engineering and significant cultural impact, these vehicles represent a key era in Australian automotive history. The range offered a variety of factory-fitted engine options, from Inline-6 to V8 configurations, and were equipped with features such as front disc brakes and optional power assistance, making them versatile for both daily use and performance applications. This comprehensive Service and Repair Manual, presented in English and exceeding 3000 pages, provides detailed guidance for the complete service and repair of all HQ-HZ models and their factory-fitted engine options. It covers essential areas including routine maintenance, engine overhaul and rebuilding, transmission service, brake and suspension systems, electrical diagnostics, and climate control. With systematic troubleshooting guides, detailed specifications, and step-by-step instructions accompanied by numerous illustrations and diagrams, this manual is an indispensable resource for owners, enthusiasts, mechanics, and restorers aiming to maintain and repair these classic vehicles effectively. 🏷️ 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...