Holden HQ HZ Workshop Manual

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Basic Information Identification Make: Holden Model: HQ / HZ Codes Chassis Codes: HQ, HZ Introduction Market Position Target Audience: Enthusiasts, DIY mechanics, and professional workshops working on Holden HQ and...

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UGS: 42624

Mots clés: Car Cars Holden HQ HZ HZ Series

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Description

Basic Information
Identification
Make:	Holden
Model:	HQ / HZ
Codes
Chassis Codes:	HQ, HZ

Introduction
Market Position
Target Audience:	Enthusiasts, DIY mechanics, and professional workshops working on Holden HQ and HZ models.
Competitive Analysis
Value Proposition:	Provides a comprehensive and authoritative guide for maintaining, diagnosing, and repairing iconic Australian Holden vehicles, offering significant cost savings over professional servicing.
Key Features
Diagrams Illustrations:	Includes diagrams and illustrations essential for understanding procedures and component relationships.
Troubleshooting Guides:	Detailed troubleshooting sections with diagnostic flowcharts to aid in identifying and resolving issues.
Technical Specifications:	Contains crucial technical data such as torque specifications, clearances, fluid capacities, and component tolerances.

Manual Details
Coverage Areas
Applicable Models:	Holden HQ (1971-1974), Holden HZ (1977-1980)
Page Count
Estimated Page Count:	Likely extensive, covering multiple engine and body variants. Exact count not specified, but characteristic of comprehensive workshop manuals.
Manual Type
Type:	Workshop Manual / Service Manual / Repair Manual
Language
Language:	English
Format
Format:	Digital Download (RAR archive containing PDF)

Manual Coverage
Systems Covered
Engine Mechanical:	Disassembly, assembly, diagnosis, and repair of all major engine components (block, heads, pistons, crankshaft, camshaft, valvetrain, lubrication, cooling).
Engine Fuel And Emissions:	Carburetor systems (e.g., Stromberg, Rochester), fuel pumps, fuel lines, exhaust systems, emission control systems (where applicable for the era).
Transmission:	Manual and automatic transmissions: clutch systems, gearboxes, torque converters, linkages, maintenance, and overhaul procedures.
Drivetrain:	Propeller shafts, universal joints, differentials, rear axles, front axles (where applicable), hub assemblies, and bearings.
Suspension:	Front and rear suspension systems: components, diagnosis, alignment, replacement of springs, shock absorbers, control arms, and bushes.
Brakes:	Hydraulic brake systems: disc and drum brakes, master cylinders, wheel cylinders, brake lines, calipers, pads, shoes, rotors, drums, and power assist systems.
Steering:	Steering systems: steering columns, steering boxes (e.g., recirculating ball), tie rods, idler arms, power steering systems (if equipped), and steering linkages.
Electrical System:	Wiring diagrams, charging system (alternator, regulator), starting system (starter motor, solenoid), ignition system (distributor, coils, spark plugs), lighting, instruments, switches, and accessories.
Body And Trim:	Body panel removal and installation, interior trim, door mechanisms, window regulators, hinges, latches, and sealing.
HVAC:	Heater systems, air conditioning systems (diagnosis, refrigerant handling, component replacement), demisting systems.
Restraint Systems:	Seat belts, mounting points, and any associated system components.
Procedures Included
Maintenance:	Routine checks, fluid changes (oil, coolant, transmission fluid, brake fluid), filter replacements, lubrication, tire rotation, and general upkeep.
Diagnosis:	Troubleshooting procedures for various systems, identifying symptoms and their root causes.
Service Operations:	Adjustments, inspections, and standard service procedures for all covered systems.
Component Replacement:	Step-by-step instructions for the removal and installation of virtually all mechanical and electrical components.
Disassembly Assembly:	Detailed rebuild procedures for major components like engines, transmissions, differentials, and steering racks.
Technical Depth
Depth:	Comprehensive. Covers everything from basic maintenance to complete engine and transmission rebuilds, including detailed diagnostic flowcharts and specifications.

Manual Specifications
File Format
Download Archive Type:	RAR
Document Format:	PDF
Required Software:	WinRAR or similar archive utility (e.g., 7-ZIP), PDF Reader (e.g., Adobe Acrobat Reader)
Compatibility:	All Versions of Windows & Mac*
Print Quality
Printability:	PDF format is typically printable for physical reference.
Binding Type
Physical Binding:	Not applicable (digital download)
Paper Type
Physical Paper:	Not applicable (digital download)

Engine Specifications
Primary Engine
Engine Options Hq:	Holden Red Engine (173 cu in / 2.8L, 202 cu in / 3.3L Inline-6), Holden V8 (253 cu in / 4.2L, 308 cu in / 5.0L V8).
Engine Options Hz:	Holden Blue Engine (173 cu in / 2.8L, 202 cu in / 3.3L Inline-6), Holden V8 (253 cu in / 4.2L, 308 cu in / 5.0L V8), often featuring updated emissions controls compared to HQ.
Performance
Torque Specifications Mention:	Manual will detail critical torque values for cylinder head bolts, main bearings, connecting rod caps, and other critical fasteners.
Fuel System
Carburetor Types:	Covers various Rochester Quadrajet, 2-barrel Rochester, and Stromberg carburetors depending on engine and model year.

Transmission
Standard
Manual Transmission:	Typically a 3-speed or 4-speed manual transmission (e.g., M20, M21).
Optional
Automatic Transmission:	Optional 3-speed Turbo Hydramatic (e.g., TH350, TH400) depending on engine and trim.
Features
Clutch Service:	Detailed procedures for clutch disc, pressure plate, and release bearing replacement, flywheel inspection and resurfacing.

Dimensions
Exterior
Body Styles:	Sedan (4-door), Station Wagon (5-door), Coupe (Monaro), Ute (2-door pickup), Panel Van (2-door commercial).
Weights
Curb Weight Range:	Varies significantly by body style and engine, typically ranging from ~1200 kg (Ute/Van) to ~1500 kg (Sedan/Wagon).

Safety Features
Ratings
Crash Safety Era:	Reflects safety standards of the 1970s. Features include seat belts, padded dashboards, and collapsible steering columns. No modern crash rating systems apply.
Active Features
Braking Assist:	Power brake booster available on many models, increasing braking efficiency.
Passive Features
Seatbelts:	Front and rear seat belts fitted as standard or optional depending on the specific model and year.

Technology Features
Infotainment
Audio System:	Factory fitted AM/FM radio, often with an 8-track player or cassette deck as an option on later models. Modern upgrades are common.
Driver Assistance
ABS:	Anti-lock Braking System (ABS) was not available during the production of HQ and HZ models.
Connectivity
Bluetooth Usb:	Not applicable in original specification. Aftermarket head units are common.

Maintenance
Service Intervals
Oil Change Interval:	Typically every 5,000 - 8,000 km (3,000 - 5,000 miles) or 6 months, depending on driving conditions and oil type used.
Tune Up Interval:	Ignition system components (plugs, points, condenser) and carburetor adjustments typically required every 15,000 - 20,000 km (10,000 - 12,000 miles).
Fluid Specifications
Engine Oil:	API SF or SG service category. Viscosity typically 20W-50 or 10W-40, depending on climate. Manual will specify exact grades.
Coolant:	Ethylene glycol based antifreeze/coolant mixed 50/50 with distilled water. Specific OAT/HOAT not relevant for this era; silicate-based inhibitors are standard.
Transmission Fluid Auto:	Dexron III (or equivalent) for Turbo Hydramatic transmissions. Manual will specify exact Dexron type.
Brake Fluid:	DOT 3 or DOT 4 glycol-based brake fluid.
Known Issues
Engine Oil Leaks:	Common wear items include valve cover gaskets, sump gaskets, and crankshaft seals.
Cooling System:	Radiator leaks, thermostat failures, and water pump leaks can occur due to age.
Suspension Wear:	Bushings, ball joints, and tie rod ends are common wear items, especially on early HQ models.
Rust Perforation:	Areas prone to rust include wheel arches, sills, floor pans, and around windows.
Electrical Gremlins:	Degradation of wiring insulation and connector corrosion can lead to intermittent electrical faults.

Vehicle History
Brand Heritage
Manufacturer Origin:	Holden is an Australian automotive manufacturer, a subsidiary of General Motors (GM) for most of its operational history.
Model Evolution
Hq Introduction:	The HQ series, launched in 1971, represented a significant styling and engineering update, becoming one of Australia's most successful car ranges. It introduced unibody construction and a wider array of engine options.
Hz Introduction:	The HZ series, launched in 1977, was a facelift of the HX model and offered revised styling (including flush grilles and updated taillights), improved emissions controls, and chassis refinements, most notably the introduction of Radial Tuned Suspension (RTS).
Production
Production Period:	HQ: 1971-1974; HZ: 1977-1980.

Awards & Recognition
Recognitions
Sales Success:	The HQ series was a phenomenal sales success, becoming Australia's best-selling car of its time, indicating widespread market acceptance and popularity.
Ratings
Automotive Icon:	Both HQ and HZ models are considered Australian automotive icons, highly sought after by collectors and enthusiasts.