🏷️ Basic Information Identification Make: Porsche Model: 928 Year: 1986 Codes Manual Product Name: Porsche 928 1986 Repair Service Manual 👋 Introduction Market Position Market Segment: Luxury Grand Tourer (GT) Competitive Analysis Key Competitors Era: Ferrari 400/412, Aston Martin Lagonda, Jaguar XJ-S Key Features Design Philosophy: Front-engine, rear-wheel-drive V8, a departure from Porsche's rear-engine tradition, aiming for comfort and GT capabilities Distinguishing Traits: Transaxle layout for optimal weight distribution, distinctive 'flying buttress' rear window design, advanced technology for its era 📋 Manual Details Coverage Areas Primary Focus: Repair and Maintenance Target Audience: Professional Technicians and Experienced DIY Mechanics Page Count Estimated Page Count: Refer to original factory manual (typically 1000+ pages for full factory service manual) Manual Type Type: Repair Service Manual / Workshop Manual Language Language: English Format Format: PDF Download File Format: PDF Print Quality: Full Printable Viewing Features: Zoom IN/OUT Delivery Method: Instant Download Requirements Software Requirements: Adobe PDF Reader & WinZip Compatibility: All Versions of Windows & Mac 📖 Manual Coverage Systems Covered Engine: Complete engine systems, including V8 engine disassembly, assembly, diagnostics, and tuning Transmission: Manual and Automatic transmission repair, overhaul, and adjustment procedures Drivetrain: Driveshaft, differential, axle repair and maintenance Suspension: Front and rear suspension components, alignment, shock absorbers, springs, and bushings Brakes: Hydraulic brake system, disc brake service, parking brake, ABS system (if equipped) Steering: Power steering system, steering rack, tie rod ends, and alignment Electrical: Complete automotive electrical system, including wiring diagrams, fuse boxes, relays, lighting, ignition, starting, charging, and accessory systems Fuel System: Fuel injection system (Bosch L-Jetronic or similar), fuel pump, injectors, fuel lines, and fuel pressure regulation Cooling System: Radiator, water pump, thermostat, coolant hoses, and climate control system Exhaust System: Exhaust manifold, catalytic converter, mufflers, and pipes Bodywork: Body panel removal and installation, interior trim, doors, windows, and glass replacement Climate Control: Air conditioning system service, heating, and ventilation Procedures Included Maintenance: Regular maintenance schedules, oil changes, filter replacements, fluid checks, and lubrication Diagnostics: Troubleshooting guides, fault code identification (if applicable), and diagnostic procedures for all systems Repair: Step-by-step repair instructions for virtually every component and system Disassembly Assembly: Detailed instructions for dismantling and reassembling all major components and sub-assemblies Cleaning Reinstalling: Procedures for cleaning parts and correct reinstallation methods Adjustment Calibration: Adjustment procedures for engine, transmission, brakes, and other systems Technical Depth Depth: Comprehensive, covering from basic fluid changes to complete engine and transmission rebuilds ⚙️ Engine Specifications Primary Engine Engine Type: Naturally Aspirated V8 Displacement: 4.7 Liters (4664 cc) Bore X Stroke: 94.0 mm x 84.5 mm Compression Ratio: 10.0:1 Valvetrain: Overhead Camshaft (OHC), 2 valves per cylinder Performance Horsepower: 234 hp (172 kW) @ 5500 rpm (US Spec) Torque: 256 lb-ft (347 Nm) @ 3500 rpm (US Spec) Fuel System Fuel Injection: Bosch L-Jetronic Fuel Injection Fuel Type: Premium Unleaded Gasoline (91+ Octane) 🔧 Transmission Standard Type: 5-Speed Manual Transaxle (optional in some markets, often standard in others) Optional Type: 3-Speed Automatic Transaxle (e.g., ZF 4HP22) Features Layout: Rear Transaxle (Engine-transmission-differential combined unit) Gear Ratios Manual 5Spd: Specific ratios available within manual, e.g., 3.500 / 2.063 / 1.333 / 1.043 / 0.864 (Final Drive: 3.308) Fluid Type Auto: Dexron III/Mercon (Check manual for exact specification) Fluid Type Manual: Gear Oil GL-4 (Check manual for exact specification and viscosity) 📐 Dimensions Exterior Length: 4655 mm (183.3 in) Width: 1785 mm (70.3 in) Height: 1280 mm (50.4 in) Wheelbase: 2430 mm (95.7 in) Weights Curb Weight: ~1500-1600 kg (3300-3527 lbs) depending on options Gross Vehicle Weight Rating: Approximately 2000 kg (4409 lbs) 🛡️ Safety Features Ratings Federal Motor Vehicle Safety Standards: Designed to meet safety standards of its era; specific NCAP ratings not available for this vintage Active Features ABS: Anti-lock Braking System (ABS) available as an option Traction Control: Not typically equipped with traction control in 1986 Passive Features Seatbelts: Three-point inertia-reel seatbelts Airbags: Driver airbag became standard in later model years, not typically standard in 1986 Crumple Zones: Engineered crumple zones in front and rear for impact absorption 💡 Technology Features Infotainment Audio System: Factory AM/FM/Cassette player, often with premium sound options Climate Control: Automatic Climate Control (ACC) with air conditioning Driver Assistance Cruise Control: Standard cruise control Connectivity Connectivity Features: Limited by era; no modern Bluetooth or USB connectivity 🔧 Maintenance Service Intervals Oil Change: Every 5,000 - 7,500 miles or 12 months (check manual for exact recommendation) Timing Belt: Crucial: Replace every 30,000 miles or 3 years due to interference engine design. Includes tensioner and idler pulleys. Coolant Flush: Every 2 years or 30,000 miles Fluid Specifications Engine Oil Type: SAE 10W-40 or 20W-50 (API SG or higher) - Consult manual for specific viscosity based on climate. Engine Oil Capacity: Approximately 8.5 Liters (9 US Quarts) with filter change Brake Fluid Type: DOT 4 Power Steering Fluid: Porsche specified power steering fluid or...