🏷️ Basic Information Identification Make: Armstrong Siddeley Model: 16 HP & 18 HP Production Years Covered: 1945-1954 Codes Chassis Numbers 16Hp: 160001 to 168500 Chassis Numbers 18Hp: 186001 to 189500 👋 Introduction Market Position Manual Value: An indispensable resource for owners and mechanics of vintage Armstrong Siddeley vehicles Competitive Analysis Uniqueness: Directly sourced from Armstrong Siddeley's official dealer network, ensuring authenticity and accuracy Key Features Official Source: Identical manual issued to Armstrong Siddeley dealers and technicians Comprehensiveness: Covers all major mechanical and electrical systems of the 16 HP and 18 HP models User Friendliness: Suitable for both novice enthusiasts and experienced professionals, aided by interactive indexing 📋 Manual Details Coverage Areas Primary Focus: Comprehensive workshop and service procedures Target Audience: Armstrong Siddeley Dealerships, Technicians, Home Workshop Mechanics Page Count Estimated Pages: N/A (Digital Manual - content driven) Manual Type Type: Service Manual / Workshop Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Engine Mechanical: Engine overhaul, decarbonising, valve grinding, lubrication, cooling system Fuel System: Carburettor service, adjustment, and overhaul Drivetrain: Clutch assembly, gearbox (transmission) service and overhaul, rear axle servicing Suspension: Front wheel suspension maintenance and repair Braking System: Brake system diagnostics, service, and repair Steering System: Steering gear maintenance and adjustment Electrical System Components: Battery, Dynamo (Generator), Starter Motor, Distributor, Control Box Regulator Electrical System Accessories: Headlamps, Rear Number Plate Illumination, Indicators, Windscreen Wiper, Electric Horn Procedures Included Maintenance Tasks: Lubrication schedules, fluid checks, general upkeep Troubleshooting: Diagnostic procedures for common faults and issues Repair Operations: Step-by-step instructions for component overhaul and replacement Technical Adjustments: Carburettor tuning, ignition timing, brake adjustments Technical Depth Depth Of Coverage: Comprehensive, suitable for full engine rebuilds and complex system repairs Diagnostic Capability: Detailed diagnostic flowcharts and symptom-based troubleshooting Specification Detail: Includes precise technical service data and specifications for all covered systems 📊 Manual Specifications File Format Software Requirement: Adobe Reader Searchability: Likely searchable text within the PDF (dependent on OCR quality of original) Interactivity: Fully bookmarked and interactive index Print Quality Digital Resolution: N/A (dependent on source scan quality) Binding Type Binding: N/A (Digital PDF) Paper Type Paper Type: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Type 16Hp: Inline 6-cylinder, Overhead Valve (OHV) Engine Type 18Hp: Inline 6-cylinder, Overhead Valve (OHV) Bore Stroke 16Hp Approx: 75.0 mm x 100.0 mm (approximate, specific details in manual) Bore Stroke 18Hp Approx: 77.8 mm x 100.0 mm (approximate, specific details in manual) Displacement 16Hp Approx: 2.6 litres (1598 cc / 16 HP RAC rating) Displacement 18Hp Approx: 2.8 litres (1781 cc / 18 HP RAC rating) Performance Horsepower 16Hp Approx: 60-70 BHP (estimated, dependent on tuning and specific model) Horsepower 18Hp Approx: 70-80 BHP (estimated, dependent on tuning and specific model) Fuel System Carburettor Type: Typically Single or Twin Zenith or SU Carburettors (specifics in manual) Fuel Type: Petrol (Gasoline) Lubrication Oil Type Recommendation: Refer to manual for specific period-correct oil grades (likely straight mineral oils, e.g., SAE 30 or 20W-50) Oil Capacity Approx: 4-5 Litres (approximate, confirm in manual) 🔧 Transmission Standard Transmission Type: Manual Synchromesh Gearbox Gear Ratios: Specific ratios detailed within the manual Optional Optional Gearbox: Some later models may have featured options like the Armstrong Siddeley preselector gearbox (confirm applicability for specific chassis numbers within the manual). Features Clutch Type: Single Dry Plate Clutch Gearbox Oil Recommendation: Refer to manual for specific period-correct gear oil grades (e.g., EP 90) 📐 Dimensions Exterior Wheelbase: Varies slightly between 16 HP and 18 HP models, detailed in manual Track Width: Varies, detailed in manual Weights Kerb Weight Approx: 1300-1500 kg (approximate, depending on body style) 🛡️ Safety Features Ratings Safety Certification: N/A (No modern crash test ratings for this era) Active Features Braking System Type: Hydraulic drum brakes on all wheels Parking Brake: Mechanical parking brake, typically acting on rear wheels Passive Features Seatbelts: Not standard equipment for this era; installation may be a modification Body Construction: Body-on-frame construction with coachwork by various coachbuilders (e.g.,Armstrong Siddeley itself, or others) 💡 Technology Features Infotainment Radio System: Optional factory-fitted or dealer-fitted radios of the era (e.g., Lucas, Marconi) not typically covered unless specifically included in an electrical supplement. Driver Assistance Driver Aids: None by modern standards. Focus on basic vehicle operation. Connectivity Connectivity Features: None 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 3,000-5,000 miles or annually (refer to manual for precise recommendations) Grease Points: Regular greasing of chassis lubrication points is crucial (details and schedule in manual) Fluid Specifications Coolant Type: Water and anti-freeze mix, type dependent on era and climate considerations (manual will specify) Brake Fluid Type: Likely DOT 3 or DOT 4 mineral oil based fluid, or specific period fluid (critical to verify in manual) Known Issues Common Wear Items: Engine oil leaks, clutch wear, brake system maintenance, suspension bushings Electrical System Challenges: Age-related degradation of...