Target Audience:
Professional technicians and experienced DIY mechanics with basic electrical and mechanical knowledge.
Comparison To Paper Manuals:
Offers same technical content and features as traditional paper manuals, with the added benefit of instant access and searchability.
Content Highlights:
Step-by-step repair procedures, critical specifications, illustrations/pictures, maintenance, disassembly, assembly, cleaning, and reinstallation procedures.
Diagrams And Illustrations:
Essential for understanding complex mechanical and electrical systems; this manual provides them.
Manual Objective:
To guide owners and mechanics through the fundamentals of repairing and maintaining the Citroën GS/GSA, imparting factory-trained technician knowledge.
Primary Coverage:
Citroën GS and GSA models
Estimated Pages:
Varies by specific edition, typically 300-500 pages for comprehensive factory service manuals.
Type:
Factory-style Repair Service Manual (PDF Download)
Delivery Method:
Instant Download
Software Requirements:
Adobe PDF Reader, WinZip
Operating Systems:
All Versions of Windows & Mac
Powertrain:
Engine, transmission, clutch, drivetrain components.
Chassis:
Suspension (hydropneumatic system detailed), steering, brakes, wheels, tires.
Electrical:
Wiring diagrams, lighting, ignition, starter, charging system, instrumentation, accessories.
Body And Interior:
Body panels, doors, glass, seats, trim, heating, ventilation.
Cooling System:
Fan, ducting, thermostat, air flow management.
Exhaust System:
Manifolds, pipes, muffler, catalytic converter (if fitted).
Maintenance:
Scheduled maintenance, fluid changes, lubrication, filter replacement.
Repair And Rebuild:
Detailed step-by-step instructions for disassembly, cleaning, inspection, assembly, and repair of all major components.
Troubleshooting:
Diagnostic procedures for common problems and fault finding.
Engine Rebuild:
Includes information on piston and ring replacement, bearing checks, valve seat grinding, cylinder honing, crankshaft and camshaft installation.
Hydropneumatic System Service:
Detailed procedures for adjusting ride height, replacing spheres, repairing hydraulic lines, and servicing the hydraulic pump and accumulator.
Depth:
Comprehensive, covering both basic DIY tasks and advanced professional-level diagnostics and repairs.
Diagnostic Capabilities:
Advanced diagnostics for engine performance, electrical faults, and hydraulic system issues.
Engine Family:
Citroën GS/GSA Flat-4 (Boxer) Air-Cooled
Engine Displacements:
1015cc, 1124cc, 1220cc (GS) and 1220cc, 1299cc (GSA)
Horsepower Range:
Approximately 56 hp to 70 hp depending on engine variant and tune.
Carburetion:
Typically single or twin Zenith downdraft carburetors.
Cooling Type:
Air-cooled with a fan assist.
Cylinder Arrangement:
Horizontally-opposed (flat-four).
Block And Head:
Aluminum alloy block and cylinder heads.
Transmission Type Standard:
4-speed or 5-speed manual transaxle.
Transmission Type Optional:
Citroën DS-G (semi-automatic) was available on some GS models, but less common for the 1975 era as the GSA introduced more conventional automatics.
Drivetrain:
Front-wheel drive (FWD).
Clutch Type:
Single dry plate, hydraulically operated clutch.
Body Styles:
2-door sedan, 4-door sedan, estate (break).
Wheelbase:
Approximately 2650 mm (104.3 inches).
Length:
Approximately 4090 mm (161 inches) for sedan.
Width:
Approximately 1620 mm (63.8 inches).
Height:
Approximately 1350 mm (53.1 inches) for sedan.
Curb Weight:
Approximately 950-1050 kg (2094-2315 lbs) depending on body style and engine.
Braking System:
Hydraulic disc brakes front and rear, with often innovative pedal arrangements and servo assistance.
Parking Brake:
Handbrake mechanism acting on rear wheels.
Safety Structure:
Designed with crumple zones, although safety standards have evolved significantly since its production.
Seatbelts:
Standard lap belts, with three-point belts becoming more common in later versions or as optional equipment.
Oil Change Interval:
Typically every 5,000 - 7,500 km (3,000 - 5,000 miles), but refer to specific manual recommendations.
Major Service Interval:
Refer to manual for timing belt (if applicable depending on engine variant), tune-ups, and system checks.
Engine Oil:
API SG or SH equivalent, viscosity typically SAE 20W-50 or 10W-40 depending on climate. (Specific recommendation required from manual.)
Hydropneumatic Fluid:
LHM (Liquide Hydraulique Minéral) Citroën's proprietary mineral-based hydraulic fluid is critical for the suspension and braking system. (Specific grade and type must be confirmed in manual.)
Transmission Fluid:
GL-4 or GL-5 gear oil, viscosity typically SAE 75W-90 or 80W-90. (Specific recommendation required from manual.)
Brake Fluid:
DOT 3 or DOT 4 compatible. (Confirmation required from manual.)
Common Problems:
Hydropneumatic system leaks (spheres, hoses, pump), electrical gremlins, corrosion (especially in older vehicles), carburetor issues, wear on suspension components.
Spark Plugs:
Specific heat range and gap to be confirmed in the manual. Example: Champion N7Y, NGK BP5ES or similar.
Fan Belt Tension:
Requires correct tensioning for fan operation and alternator charging. Manual will detail procedure.
Typical Tire Size:
145 SR 15 or 155 SR 15.
Wheel Bolt Pattern:
4x130mm.
Spark Plug Gap:
Approximately 0.7 - 0.8 mm (0.028 - 0.032 inches).
Ignition Timing:
Specific degrees BTDC at idle RPM, requires timing light and manual specifications.
Citroen Philosophy:
Known for innovative engineering, aerodynamic design, and advanced suspension systems (hydropneumatic).
Gs To Gsa:
The GS (Gran' Sport) was launched in 1970. The GSA (Gran' Sport Améliorée) was a significant facelift and update introduced in 1978, featuring updated styling, interior, and often the larger 1299cc engine. This manual covers the GS, with potential overlap for early GSA aspects if the 1975 year implies the GS platform.
Gs Design Inspiration:
Designed by Robert Opron, influenced by Italian styling and aiming for aerodynamic efficiency and a distinctive appearance.
Gsa Facelift Details:
The GSA featured a revised front-end with integrated bumpers, a new dashboard layout, and often the 5-speed gearbox as standard.
Production Period:
GS: 1970-1986. GSA: 1978-1987.
