🏷️ Basic Information Identification Make: Porsche Model: 911 Year: 1989 Codes Chassis Code: 964 Engine Code Variant: 3.6L SOHC 👋 Introduction Market Position Vehicle Segment: Sports Car / Grand Tourer Historical Significance: The 964 generation marked a significant evolution for the iconic Porsche 911, introducing a more modern chassis, improved aerodynamics, and a more powerful engine. Competitive Analysis Key Competitors: Ferrari 348, Lotus Esprit, Chevrolet Corvette C4. Key Features Aerodynamics: Integrated front bumper, automatic rear spoiler, and flush-fitting headlights for improved aerodynamics. Powertrain Innovation: Introduction of the 3.6-liter M64 engine, an evolution of Porsche's air-cooled flat-six. 📋 Manual Details Coverage Areas Engine Systems: Cylinder head refacing, valve seat grinding, valve guide replacement, camshaft inspection and adjustment, piston and connecting rod removal/installation, crankshaft inspection, lubrication system, cooling system. Engine Type: Internal Combustion - Naturally Aspirated Page Count Estimated Pages: 150-200 Manual Type Type: Specialized Repair Manual / Technical Guide Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Primary Focus: Porsche 911 (964) 3.6L engine cylinder head overhaul and related components. Procedures Included Cylinder Head Refacing: Detailed step-by-step instructions for measuring flatness, machining tolerances, and surface finish requirements for cylinder head refacing. Valve Servicing: Valve removal, cleaning, inspection, seat grinding, valve stem seal replacement, and valve installation procedures. Camshaft And Timing: Camshaft inspection, bearing journal checks, valve lash adjustment procedures, and timing belt/chain (if applicable for the specific variant) inspection and adjustment. Technical Depth Diagnostic Procedures: Troubleshooting common engine performance issues related to cylinder head and valve train. Includes symptoms, causes, and corrective actions. Rebuild Procedures: Comprehensive instructions for engine disassembly, cleaning of components, inspection for wear and damage, and reassembly of the engine, with a strong emphasis on cylinder head components. Illustrations And Diagrams: High-quality illustrations, exploded views, and detailed diagrams of engine components, sub-assemblies, and critical measurement points. 📊 Manual Specifications File Format Searchability: Searchable text for easy navigation and quick lookup of specific information. Print Quality Resolution: High-resolution images and text suitable for printing. Binding Type Binding Type: N/A (Digital Format) Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Naturally Aspirated, Air-Cooled Flat-Six (Boxer) Displacement: 3596 cc (3.6 Liters) Bore X Stroke: 100.0 mm x 76.4 mm Compression Ratio: 10.3:1 (Typical) Performance Horsepower Ps: 250 PS @ 6100 rpm (Carrera 4), 260 PS @ 6100 rpm (Carrera 2) Torque Nm: 312 Nm @ 4800 rpm (Carrera 4), 312 Nm @ 4800 rpm (Carrera 2) Fuel System Fuel Injection: Bosch Motronic Electronic Fuel Injection Fuel Type: Unleaded Gasoline, 95 RON minimum Valve Train Configuration: SOHC (Single Overhead Camshaft) per bank, 2 valves per cylinder. Valve Lash Adjustment: Requires periodic adjustment using shims. Lubrication System Oil Capacity: Approx. 10.5 Liters (with filter) Recommended Oil: Mobil 1 15W-50 or equivalent high-performance synthetic oil. 🔧 Transmission Standard Type: 5-Speed Manual Transaxle (G50) Optional Type: Tiptronic Automatic Transmission (Optional on Carrera 2) Features Clutch Type: Hydraulically actuated, single dry plate clutch. Transaxle Fluid Capacity: Approx. 3.0 Liters Recommended Transaxle Fluid: GL-5, SAE 75W-90 Synthetic Gear Oil. 📐 Dimensions Exterior Length: 4250 mm Width: 1775 mm Height: 1310 mm Weights Curb Weight: Approx. 1450 kg (Carrera 2), 1520 kg (Carrera 4) Gross Vehicle Weight Rating: Approx. 1840 kg 🛡️ Safety Features Ratings Crash Test Performance: As per 1980s standards, limited formal crash test data available compared to modern vehicles. Known for robust body structure. Active Features ABS: Anti-lock Braking System (ABS) standard on Carrera 4, optional on Carrera 2. Passive Features Airbags: Driver-side airbag standard from 1990 model year onwards. Seatbelts: Three-point inertia-reel seatbelts. 💡 Technology Features Infotainment Audio System: Optional premium sound systems from Blaupunkt or Becker, typically featuring cassette players and analog tuners. Driver Assistance Cruise Control: Available as an option. Connectivity Connectivity Features: Limited by modern standards; primarily analog systems. 🔧 Maintenance Service Intervals Oil Change Interval: Every 5,000 - 7,500 miles or annually, whichever comes first. Major Service Interval: Every 30,000 miles (includes valve adjustment, belt replacement, etc.) Fluid Specifications Brake Fluid: DOT 4 Coolant Type: Air-cooled engine, no coolant required for engine block. Known Issues Cylinder Head Gaskets: Potential for leaks due to age and heat cycles. Refacing and new gaskets are a common repair. Valve Guides: Wear in valve guides can lead to oil consumption and poor valve sealing. Requires replacement during head work. Camshaft Wear: Wear on camshaft lobes and bearing surfaces can affect performance. Regular inspection and potential replacement are recommended. Oil Leaks: Common from seals, particularly around the crankcase and cylinder heads. 📚 Vehicle History Brand Heritage Founding Year: 1931 Brand Philosophy: Performance, engineering excellence, and motorsport heritage. Model Evolution 911 Generations: Preceded by the 930 (911 Turbo) and G-Series 911. Followed by the 993 generation. 964 Introduction: Introduced in late 1988 for the 1989 model year. Production Production Years: 1989-1994 Manufacturing Location: Stuttgart, Germany 🏆...