🏷️ Basic Information Identification Make: Porsche Model: 944 Turbo Model Code: 951 Generation Generation Name: Second Generation (944 Series) Codes Engine Code Prefix: M44 👋 Introduction Market Position Category: Performance Sports Coupe Segment: Front-engine, rear-wheel-drive sports car Competitive Analysis Key Competitors: Chevrolet Corvette, Nissan 300ZX (Z31), Toyota Supra (MkIII), BMW 6 Series. Key Features Engine Layout: Transaxle design (engine and transmission at opposite ends) for optimal weight distribution. Aerodynamics: Distinctive aerodynamic bodywork with integrated front spoiler and rear wing. 📋 Manual Details Coverage Areas Years Covered: 1987, 1988, 1989, 1990, 1991 Specific Models Covered: Porsche 944 Turbo (951) Page Count Estimated Page Count: Varies by publication, but comprehensive manuals typically exceed 1000 pages. Manual Type Type: Full Service Repair Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Full rebuild procedures, component diagnostics, timing belt replacement, fuel injection system. Engine Management: Ignition system, fuel delivery, emissions control, ECU diagnostics and troubleshooting. Transmission: Manual and automatic transmission overhaul, clutch service, driveline components. Brakes: Hydraulic system, ABS troubleshooting, brake pad/rotor replacement, caliper service. Suspension Steering: Front and rear suspension overhaul, power steering system, wheel alignment specifications. Electrical System: Complete wiring diagrams, component testing, fuse and relay identification, starter and alternator service. Body Chassis: Body panel repair, door and window mechanisms, interior trim removal, structural components. HVAC: Air conditioning system service, heater core replacement, climate control diagnostics. Fuel System: Fuel pump testing, injector diagnostics, fuel tank service, fuel pressure specifications. Cooling System: Radiator and fan service, thermostat replacement, coolant specifications, pressure testing. Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, tune-up procedures. Diagnostics: Troubleshooting guides for common and uncommon issues, diagnostic trouble codes (DTCs). Repair: Detailed, step-by-step instructions for component removal, installation, and repair. Rebuild: Comprehensive engine and transmission rebuild procedures. Refurbishment: Guidance on restoring worn or damaged components. Restoration: Information relevant to bringing the vehicle back to its original specification. Wiring Diagrams: Detailed, system-specific wiring schematics. Technical Depth Depth: Extensive, suitable for professional technicians and advanced DIY enthusiasts. Detail Level: Detailed sub-steps, notes, cautions, and warnings for critical information. Illustrations: Detailed illustrations, drawings, and photos. 📊 Manual Specifications File Format Format: PDF Searchability: Text-searchable PDF content. Print Quality Printability: Full printable pages. Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) Delivery Method: Instant Download Requirements Software Requirements: Adobe PDF Reader, WinRAR (for decompression if applicable). Compatibility Operating Systems: All versions of Windows and Mac. ⚙️ Engine Specifications Primary Engine Engine Type: Turbocharged Inline 4-cylinder Displacement: 2.5 Liters (2479 cc) Bore X Stroke: 104.0 mm x 73.0 mm Compression Ratio: 9.0:1 Valvetrain: Dual Overhead Camshafts (DOHC), 16 valves Performance Horsepower Hp: 217-224 hp (depending on market and year) Torque Lb Ft: 240-250 lb-ft (depending on market and year) Redline: 6000 RPM Fuel System Fuel Delivery: Bosch L-Jetronic fuel injection with turbocharger Turbocharger: Garrett AiResearch T03/04 (or similar) Recommended Octane: 91+ Octane 🔧 Transmission Standard Transmission Type: 5-Speed Manual Transaxle Optional Transmission Type: 4-Speed Automatic Transaxle (optional) Features Clutch: Hydraulically actuated single-plate dry clutch Transaxle Design: Integrated transaxle (rear-mounted transmission and differential) 📐 Dimensions Exterior Length: Approx. 168.0 inches (4267 mm) Width: Approx. 68.0 inches (1727 mm) Height: Approx. 49.7 inches (1262 mm) Wheelbase: Approx. 94.5 inches (2400 mm) Front Track: Approx. 58.7 inches (1491 mm) Rear Track: Approx. 57.7 inches (1465 mm) Weights Curb Weight: Approx. 3000-3150 lbs (1360-1430 kg) Gvw: Approx. 4000 lbs (1814 kg) 🛡️ Safety Features Ratings NHTSA Front Impact: Likely not rated under modern NHTSA standards for its era. IIHS Side Impact: Likely not rated under modern IIHS standards for its era. Active Features ABS: Anti-lock Braking System (ABS) standard on Turbo models. Traction Control: Optional or standard on later models (check specific vehicle). Passive Features Airbags: Driver-side airbag standard, passenger airbag optional on some later models. Seatbelts: 3-point inertia-reel seatbelts front and rear. Rollover Protection: Reinforced A-pillars and integrated roll bar within the windshield frame. 💡 Technology Features Infotainment Audio System: Factory AM/FM cassette stereo, often with premium sound system option (e.g., Blaupunkt). Dashboard Display: Analog gauges with driver information system (DIS) on some models. Driver Assistance Cruise Control: Standard feature on most Turbo models. Connectivity Bluetooth: Not available on original factory equipment. Auxiliary Input: Not standard, often added via aftermarket modifications. 🔧 Maintenance Service Intervals Oil Change Interval: Every 7,500 miles or 12 months, whichever comes first. Timing Belt Replacement: Every 60,000 miles or 5 years. Critical for this engine to prevent catastrophic damage. Spark Plugs: Inspect every 15,000 miles, replace as needed (typically every 30,000 miles). Fluid Specifications Engine Oil: SAE 5W-40 or 10W-40 synthetic oil meeting Porsche A40 specification (or equivalent). Coolant: Porsche-approved coolant (typically a 50/50 mix of ethylene glycol and distilled water). Brake Fluid: DOT 4 or DOT 5.1 brake fluid. Transmission Fluid Manual: SAE 75W-90 GL-5 gear oil. Transmission Fluid Automatic:...