🏷️ Basic Information Identification Make: Porsche Model: 928 Years Covered: 1978-1985 👋 Introduction Market Position Target Audience: Porsche 928 Owners, Enthusiasts, Independent Repair Shops, Restoration Specialists Competitive Analysis Value Proposition: Provides expert-level, model-specific HVAC repair information for the Porsche 928, empowering owners to perform accurate diagnostics and repairs, avoiding potentially misleading generic guides. Key Features Features: Instant digital download, model-specific, expert-level technical data, money-back guarantee. 📋 Manual Details Coverage Areas Primary Focus: Heating, Ventilation, and Air Conditioning (HVAC) System Page Count Estimated Pages: Varies (Digital Download - Printable) Manual Type Type: Technical Service Manual / Repair Manual Language Language: English Format Format: Digital Download (PDF) 📖 Manual Coverage Systems Covered HVAC Components: Compressor, Condenser, Evaporator, Receiver-Drier, Expansion Valve, Blower Motor, Heater Core, Control Head, Ducts, Actuators, Refrigerant Lines, Vacuum System (for HVAC controls) Electrical System: Wiring diagrams for the HVAC system, including blower motor relays, fan motors, control head wiring, and sensor connections. Procedures Included Diagnostic Procedures: Troubleshooting charts, fault isolation, system pressure testing, electrical diagnostics for HVAC circuits Repair Procedures: Component replacement (compressor, blower, heater core, etc.), system flushing, refrigerant evacuation and recharge, seal replacement, hose repair/replacement, control unit adjustments Refrigerant Handling: Safe handling, evacuation, and charging procedures for R-12 refrigerant (common for these years), including required equipment and capacities. Technical Depth Depth: Detailed component descriptions, system operation theory, wiring diagrams specific to HVAC, component specifications, alignment procedures Schematics: Detailed electrical schematics and vacuum line routing diagrams specific to the HVAC system. 📊 Manual Specifications File Format File Type: PDF Print Quality Printability: High-resolution, printable pages for ease of use in a workshop environment Binding Type Binding: N/A (Digital Download - User Prints/Binds) Paper Type Paper Recommendation: N/A (Digital Download - User Dependent) ⚙️ Engine Specifications Primary Engine Engine Type: Front-mounted, V8 Displacement Early Models: 4.5 Liters (4474 cc) Displacement Later Models: 4.7 Liters (4664 cc) and 5.0 Liters (5000 cc) Performance Horsepower Range: Approximately 230-320 hp depending on year and market Torque Range: Approximately 260-330 lb-ft depending on year and market Fuel System Fuel Injection: Bosch K-Jetronic (CIS) Fuel Injection (later models may have updates) Engine Ancillaries Cooling System: Liquid-cooled, often featuring dual electric fans and a large radiator. 🔧 Transmission Standard Transmission Type: 5-speed Manual Transaxle (Early models) Optional Transmission Type: 3-speed Automatic Transaxle (Later models primarily offered Tiptronic-style automatic) Features Transaxle Layout: Rear-mounted transaxle combining transmission and differential for optimal weight distribution. Fluid Specifications Automatic Transmission Fluid: Refer to manual for specific ATF type (e.g., Dexron II/III or equivalent) Manual Transmission Fluid: Refer to manual for specific gear oil type (e.g., SAE 90 GL-4/GL-5) 📐 Dimensions Exterior Length: Approximately 4,700 mm (185 in) Width: Approximately 1,780 mm (70 in) Height: Approximately 1,280 mm (50.4 in) Weights Curb Weight: Approximately 1,500 - 1,600 kg (3,300 - 3,500 lbs) Wheelbase: Approximately 2,600 mm (102.4 in) Wheels Tires Wheel Bolt Pattern: 5x130 mm Typical Tire Sizes: 205/60 VR15, 225/50 VR16 (depending on model and options) 🛡️ Safety Features Ratings Crash Test Data: Limited comprehensive US crash test data available for this era; designed with Porsche's high safety standards of the time. Active Features Brakes: Four-wheel disc brakes, often ventilated front discs. Suspension: Independent front and rear suspension, often with optional self-leveling rear suspension. Passive Features Body Construction: Sturdy unibody construction with significant structural reinforcement. Seat Belts: Three-point front seat belts, often with inertial reels. 💡 Technology Features Infotainment Audio System: Factory installed AM/FM stereo radio with cassette player. Upgrades and aftermarket units are common. Climate Control Climate Control Type: Manual or automatic climate control system depending on model year and specifications, featuring electronic or vacuum-actuated controls. Driver Assistance ABS: Anti-lock Braking System (ABS) became available and standard on later models. Connectivity Connectivity Features: Limited to basic audio and climate control systems; no modern Bluetooth or infotainment integration from the factory. 🔧 Maintenance Service Intervals Oil Change Interval: Refer to manual; typically 5,000-7,500 miles or 1 year. Major Service Interval: Refer to manual; includes timing belt (if applicable on later variants) and other critical component checks/replacements. Fluid Specifications Engine Oil Type: Refer to manual for specific viscosity and API rating (e.g., 20W-50 or 15W-50 synthetic recommended). Coolant Type: Ethylene glycol based coolant, typically a 50/50 mix with distilled water. Brake Fluid Type: DOT 3 or DOT 4 brake fluid. Known Issues HVAC Common Problems: Leaking heater cores, failing blower motors, degraded vacuum lines for HVAC controls, leaky O-rings and seals in the AC system, refrigerant leaks, malfunctioning climate control unit. General Common Problems: Cooling system leaks, fuel line deterioration, electrical gremlins, wear on suspension components, shifter linkage wear. Part Numbers Oem Reference Note: OEM part numbers are critical for accurate ordering and are detailed within comprehensive service manuals. 📚 Vehicle History Brand Heritage Brand Focus: Porsche is renowned for its performance-oriented sports cars, blending engineering excellence with luxury and racing...