Positioning:
The Citroën GS/GSA was positioned as a distinctive and technologically advanced compact family car, offering a unique blend of comfort and aerodynamic styling.
Competitors:
Competed against vehicles like the Ford Escort, Volkswagen Golf, Renault 14, and Fiat 128, often differentiating itself with its hydropneumatic suspension and unconventional styling.
Suspension:
The signature hydropneumatic suspension provided unparalleled ride comfort and self-leveling capability, regardless of load.
Aerodynamics:
Sleek, aerodynamic design penned by Robert Opron, contributing to good fuel efficiency and stability.
Cabin Design:
Unique 'asteroid' dashboard in early models and a driver-focused cockpit, with distinctive steering wheel design.
Audience:
Primarily aimed at professional technicians, but also accessible to DIY enthusiasts with a foundational understanding of vehicle mechanics and electronics.
Engine Types:
4-cylinder boxer engines (e.g., 1299cc, 1360cc, 1580cc for GS/GSA)
Hydropneumatic Suspension:
Detailed coverage of the unique self-leveling suspension system, including sphere service, hydraulic fluid, pressure regulation, and ride height adjustment.
Body Structure:
Coverage of unibody construction, panel repair, door mechanisms, glass replacement, and interior fitting.
Instrumentation And Controls:
Explanation of all dashboard instruments, controls, and indicator lights.
Lighting System:
Headlights, taillights, interior lighting, and related electrical circuits.
Ignition System:
Distributor, ignition coil, spark plugs, and timing procedures.
Carburetion:
Detailed information on Solex carburettors (e.g., 32 DIDTA, 34 PDSIT) and their adjustment.
Routine Maintenance:
Oil changes, filter replacements, spark plug checks, fluid level checks.
Engine Overhaul:
Piston and ring replacement, cylinder head removal/installation, valve adjustments, crankshaft and bearing service.
Transmission Service:
Clutch replacement, gearbox disassembly/assembly, gear linkage adjustment.
Brake System Repair:
Pad/shoe replacement, caliper/wheel cylinder service, brake fluid bleeding, disc/drum machining.
Suspension Component Replacement:
Ball joint, control arm, and shock absorber replacement (where applicable outside hydropneumatic system).
Electrical Troubleshooting:
Diagnosis and repair of wiring faults, starter motor, alternator, and lighting issues.
Body Repair:
Dent removal, rust repair techniques, panel alignment, and trim fitting.
Heating And Ac Service:
Blower motor, heater core, and ducting service (AC typically optional and may have separate coverage).
Depth:
Comprehensive; suitable for professional technicians and experienced DIYers with basic mechanical/electrical knowledge. Covers from routine maintenance to complete component overhaul.
Diagnostic Information:
Includes diagnostic charts, symptom analysis, and troubleshooting guides for common issues.
Specifications And Tolerances:
Detailed torque specifications, clearances, and component tolerances for all major assemblies.
Illustrations And Diagrams:
Extensive use of diagrams, exploded views, and photographs to illustrate disassembly, assembly, and repair procedures.
Type:
Air-cooled, flat-four (boxer) engine
Displacement Gs Standard:
1299 cc (1.3 L)
Displacement Gsa Standard:
1360 cc (1.4 L) or 1580 cc (1.6 L)
Horsepower 1.3L:
Approx. 60-65 hp
Horsepower 1.6L:
Approx. 75-85 hp
Torque 1.6L:
Approx. 130-140 Nm
Carburetor Type:
Single or twin-choke Solex downdraft carburetors (e.g., 32 DIDTA, 34 PDSIT)
Fuel Type:
Unleaded Petrol (depending on market and era of tune)
Cooling Method:
Air-cooled
Oil Change Interval:
Typically every 5,000 - 7,500 km (3,000 - 4,500 miles) or annually.
Air Filter Replacement:
Every 10,000 - 15,000 km (6,000 - 9,000 miles).
Spark Plug Replacement:
Every 15,000 - 20,000 km (9,000 - 12,000 miles).
Engine Oil:
Refer to manual for specific grade (e.g., API SF/SE) and viscosity (e.g., 10W-40, 20W-50) based on climate. Capacity approx. 3.5-4.0 liters.
Hydropneumatic Fluid:
LHM (Liquide Hydraulique Minéral), Citroën's specific hydraulic fluid. Capacity for system approx. 3-4 liters. Crucial to use the correct fluid type.
Brake Fluid:
DOT 3 or DOT 4 (depending on specific system in later models/modifications). Capacity for brake system (separate from hydropneumatic) approx. 0.5 - 0.75 liters.
Transmission Fluid:
GL-4 Hypoid gear oil, viscosity SAE 75W-90 or 80W-90. Capacity approx. 2.0-2.5 liters.
Suspension Leaks:
Hydraulic fluid leaks from hoses, seals, or the height corrector are common with age. Requires specialized knowledge and parts.
Rust:
Like many cars of this era, susceptible to rust, particularly in the sills, wheel arches, and floor pans.
Carburetor Issues:
Carburetors can become gummed up, leading to poor idling or starting problems. Requires careful cleaning and adjustment.
Electrical Gremlins:
Ageing wiring harnesses and connectors can lead to intermittent electrical faults.
Heritage:
Citroën is renowned for its pioneering spirit and avant-garde engineering, particularly in suspension systems (like the DS) and aerodynamic design, a legacy continued by the GS/GSA.
Gs Introduction:
The GS was launched in 1970 as a successor to the Ami 8, aiming to bridge the gap between the basic Ami and the luxury DS.
Gsa Introduction:
The GSA was an updated version of the GS, introduced in 1980, featuring a revised ('integrated') dashboard, improved aerodynamics, and minor mechanical revisions, including the option of the larger 1580cc engine.
Production Years:
GS: 1970-1986; GSA: 1980-1986
Locations:
Primarily France, with some production also in other European countries and South Africa.