Heritage:
The 1973 911 represents a significant evolution of the iconic Porsche sports car, known for its purity of driving experience and performance.
Era Competitors:
Competed against other premium sports cars of its era, offering a distinct rear-engine, air-cooled driving dynamic.
Driving Experience:
Renowned for its handling, steering feel, and distinctive flat-six engine sound.
Mechanical Purity:
Characterized by its mechanical complexity and analog feel, appealing to enthusiasts who appreciate direct interaction with their vehicle.
Primary Focus:
Full Service, Repair, Maintenance, Rebuild, Refurbishment, Restoration
Estimated Pages:
Approximately 500+
Type:
Factory Service Manual / Workshop Manual
Format:
Print (implied by 'manual')
Engine:
Detailed breakdown of 2.4L flat-six (911/06, 911/07, 911/08, 911/09 engines), including lubrication, cooling, fuel injection (MFI), ignition, and emissions control systems.
Transmission:
Coverage for the 915 5-speed manual transaxle, including clutch, gears, synchronizers, and final drive.
Brakes:
Front and rear disc brake system inspection, service, and repair, including master cylinder, calipers, rotors, and brake lines.
Suspension Steering:
Detailed information on front independent suspension (torsion bar), rear semi-trailing arms, shock absorbers, steering rack, and alignment procedures.
Electrical:
Comprehensive schematics and troubleshooting for the 12-volt electrical system, including lighting, instrumentation, starter, alternator, ignition switch, and ancillary components.
Fuel System:
In-depth coverage of the Bosch Mechanical Fuel Injection (MFI) system, including fuel pumps, pressure regulators, air flow meter, injector maintenance, and adjustment procedures.
Exhaust System:
Information on muffler, catalytic converter (where applicable by market), and exhaust manifold service.
Body Chassis:
Body panel repair, rust prevention, door and window mechanisms, interior trim, and chassis component inspection.
Maintenance:
Oil changes, filter replacements, spark plug service, air filter service, belt tension adjustments, and general lubrication points.
Repair:
Engine overhaul (piston, cylinder, valve service), transmission rebuild, brake caliper rebuild, suspension component replacement, and electrical component repair.
Troubleshooting:
Systematic diagnosis of common issues, including engine performance problems, starting issues, electrical faults, and braking system irregularities.
Rebuild Refurbish:
Detailed instructions for complete engine and transmission disassembly, inspection, and reassembly.
Depth:
Comprehensive: Covers everything from routine maintenance to full engine and transmission rebuilds, including specialized tools and torque specifications.
Digital Quality:
High-resolution scans, clear legibility, searchable text (if digitally delivered).
Paper Stock:
Durable paper stock suitable for workshop environments (e.g., laminated pages, heavy-duty paper).
Binding:
Professional binding (e.g., spiral bound, stitched and glued) for lay-flat usability.
Type:
Air-cooled, horizontally opposed (flat-six) boxer engine
Displacement:
2341 cc (2.4 Liters)
Bore X Stroke:
84.0 mm x 70.4 mm
Compression Ratio:
8.0:1 (standard)
Engine Variants:
911/06 (T), 911/07 (E), 911/08 (S), 911/09 (Carrera RS 2.7 - though RS is often a distinct model/year)
Horsepower T:
130 PS (96 kW) at 5,100 rpm
Horsepower E:
165 PS (121 kW) at 5,800 rpm
Horsepower S:
190 PS (140 kW) at 6,500 rpm
Torque S:
215 Nm (159 lb-ft) at 5,000 rpm
Injection System:
Bosch Mechanical Fuel Injection (MFI)
Fuel Type:
Premium Unleaded Gasoline (RON 98 recommended)
Type:
Air-cooled with oil cooler
Type:
Porsche 915 5-speed manual transaxle
Type:
None for 1973 models (automatic Sportomatic was phased out for 911 models).
Gear Ratios:
Varies by model (T, E, S), documented in manual.
Clutch:
Single dry plate diaphragm spring clutch.
Oil Change:
Every 5,000 - 7,500 km (3,000 - 5,000 miles) or annually, whichever comes first.
Major Tune Up:
Every 15,000 - 20,000 km (9,000 - 12,000 miles) including spark plugs, points, valve adjustment, and MFI settings.
Engine Oil:
SAE 20W-50 (e.g., Castrol GTX, Mobil 1 Synthetic - consult manual for specific grades and approvals).
Transmission Oil:
API GL-5, SAE 75W-90 or 80W-90 (e.g., Mobilube, Red Line).
Brake Fluid:
DOT 3 or DOT 4 high-temperature brake fluid.
Coolant:
N/A (Air-cooled engine).
Mfi Calibration:
Sensitivity of the Mechanical Fuel Injection system to proper calibration and maintenance.
Oil Leaks:
Common for air-cooled Porsches due to numerous sealing surfaces and heat cycles; requires regular inspection of engine seals and gaskets.
Tin Worm:
Potential for rust in floor pans, longitudinals, and battery areas due to age and moisture.
Engine Case Cracks:
Rare but possible on early magnesium engine cases due to thermal stress; requires careful inspection during engine rebuilds.
Clutch Release Bearing:
Wear on the clutch release bearing and associated components.
Legacy:
Porsche's long history of motorsport and performance engineering.
G Series Introduction:
The 1973 model year marked the introduction of the 'G-Series' body shell with distinctive bellows-style bumpers, although the full G-series styling became more prominent in 1974.
Engine Development:
The 2.4L engine was an evolution from the earlier 2.2L units, offering increased displacement and power.
Manufacturing Location:
Stuttgart-Zuffenhausen, Germany
