🏷️ Basic Information Identification Make: Porsche Model: 944 Product Name: Porsche 944 Service Repair Manual 👋 Introduction Market Position Vehicle Class: Front-engine, rear-wheel drive, sports coupe and convertible. Competitive Analysis Competitors: BMW 3 Series, Nissan 300ZX, Toyota Supra, Chevrolet Camaro. Key Features Transaxle Design: Innovative transaxle layout providing near-perfect 50/50 weight distribution. Design Heritage: Stuttgart design influences with a focus on aerodynamics and driver engagement. Manual Benefit Diy Support: Empowers owners to perform maintenance and repairs, saving on labor costs and fostering a deeper understanding of their vehicle. Professional Tool: Indispensable tool for professional mechanics and dealerships for accurate diagnostics and repairs. 📋 Manual Details Coverage Areas Primary Coverage: Complete mechanical and electrical repair, maintenance, and diagnostics for the Porsche 944. Page Count Estimated Pages: Over 1500 (typical for comprehensive Porsche service manuals). Manual Type Type: Factory-authorized Service and Repair Manual. Language Language: English Format Format: PDF (Digital) 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, fuel system, ignition system, cooling system, exhaust system, lubrication system. Drivetrain: Clutch, transmission (manual and automatic), driveshafts, differential, transaxle. Suspension Steering: Front and rear suspension components, shock absorbers, springs, control arms, steering rack, power steering. Brakes: Brake system hydraulics, calipers, rotors, pads, parking brake, ABS (if equipped). Electrical: Wiring diagrams, lighting, starting and charging system, engine control module (ECU), body electronics, instruments. Body Chassis: Body panels, doors, glass, interior trim, chassis structure, corrosion protection. Procedures Included Maintenance: Oil changes, fluid checks and changes, filter replacements, belt inspections/replacement, spark plug service. Repair: Engine rebuilds, transmission overhaul, suspension component replacement, brake caliper rebuilding, electrical component repair. Diagnostics: Troubleshooting guides for common issues, diagnostic trouble codes (DTCs) interpretation, component testing procedures. Installation: Component installation and removal procedures for all major systems. Technical Depth Depth: Comprehensive, covering from basic maintenance to full engine and transmission overhauls, including specialized tools and torque specifications. 📊 Manual Specifications File Format Digital Format: PDF Print Quality Printability: High-resolution, suitable for printing individual pages or the entire document. Binding Type Binding: N/A (Digital Format) Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Code: M44.30 (2.5L I4) Displacement: 2479 cc (2.5 Liters) Configuration: Inline 4-cylinder, front-mounted. Bore X Stroke: 104.0 mm x 73.2 mm Compression Ratio: 10.2:1 Cylinder Head: Aluminum alloy, DOHC, 4 valves per cylinder. Timing System: Timing belt driven camshafts. Performance Horsepower: 168 hp @ 5900 rpm (NA models) Torque: 205 Nm (151 lb-ft) @ 4500 rpm (NA models) Turbocharged Performance: 220 hp @ 6000 rpm (944 Turbo/S models) Turbocharged Torque: 330 Nm (243 lb-ft) @ 4000 rpm (944 Turbo/S models) Fuel System Fuel Delivery: Bosch L-Jetronic or Motronic fuel injection. Fuel Type: Unleaded gasoline, premium octane recommended (91+). Cooling System Type: Liquid-cooled. 🔧 Transmission Standard Type: 5-speed manual transaxle. Optional Type: 3-speed automatic transaxle (e.g., ZF 4HP22). Features Transaxle Layout: Integrated transmission and differential unit at the rear axle. Fluid Specification Manual Transmission Fluid: Porsche Approved Hypoid Gear Oil SAE 90 (e.g., Mobilube HD 80W-90). Automatic Transmission Fluid: Dexron III or equivalent. 📐 Dimensions Exterior Length: Approx. 4200-4250 mm (depending on model year). Width: Approx. 1700-1730 mm (depending on model year). Height: Approx. 1270-1290 mm (depending on model year). Weights Curb Weight: Approx. 1250-1350 kg (depending on model and equipment). Gross Vehicle Weight Rating: Approx. 1750 kg. 🛡️ Safety Features Ratings Crash Testing: While formal US NCAP ratings are limited for older European models, Porsche engineering prioritizes occupant safety through structural integrity. Active Features Braking System: Four-wheel disc brakes (ventilated front, solid rear, larger on Turbo models). ABS: Optional Anti-lock Braking System (ABS) available on later models. Passive Features Seatbelts: Three-point inertia-reel seatbelts with pretensioners. Airbags: Driver-side airbag standard from 1990 onwards. Roll Bar: Integrated roll bar structure for convertible models. 💡 Technology Features Infotainment Audio System: Factory-installed radio/cassette systems, often with optional amplifier upgrades. Driver Assistance Cruise Control: Standard on most models. 🔧 Maintenance Service Intervals Oil Change: Every 7,500 miles or 12 months, whichever comes first. Timing Belt Replacement: Every 45,000-60,000 miles or 4-5 years (crucial for engine integrity). Coolant Flush: Every 2-3 years. Fluid Specifications Engine Oil: Mobil 1 5W-40 or equivalent synthetic, 5.5 Liters (with filter). Coolant: Porsche G-48 or equivalent ethylene glycol coolant, 10.5 Liters. Brake Fluid: DOT 4 brake fluid. Known Issues Torque Converter Seal: Potential leaks from the torque converter seal on automatic transmission models. Fuel Pump Relay: Failure of the fuel pump relay can prevent the engine from starting. Window Regulators: Weak or failed window regulator mechanisms. Imbalance Shafts: Early 2.5L engines had imbalance shafts; removal can be a common modification, requiring specific procedures. 📚 Vehicle History Brand Heritage Foundation: Porsche AG, established 1931, renowned for performance sports cars. Model Evolution Introduction: Introduced in 1981 as a replacement for the 924. Generation 1: Early 944 models (1981-1985) featured a 2.5L naturally aspirated inline-four. Generation 2: Later 944 models...