The Citroen GS (1977-1980) is renowned for its groundbreaking hydropneumatic suspension, delivering an unmatched ride quality that stands out even today. Combining comfort with compactness, its innovative features made it a sensation in the 1970s, securing its place as a distinctive classic car cherished in New Zealand.
Hydro-pneumatic suspension issues including leaks and height control problems are very common. Engine issues can be complex, and are usually related to either carburation issues or oil leaks. Rust can also be present, especially in the sills and floor pans.
WOF tips
The hydro-pneumatic suspension must function correctly for WOF. Brakes and lights are also checked thoroughly. Any rust will obviously be an issue.
About the Citroen GS G11/631 Wagon
Featuring a flat-four air-cooled engine, the GS provides both power and fuel efficiency, much like its kin, the VW Beetle. The hydro-pneumatic suspension system is a key selling point, but it requires regular maintenance, with fluid checks and servicing critical to its performance. Owners should be particularly mindful of the following: the cooling system, which requires attention around 150,000km, including inspection of the water pump, thermostat, and radiator hoses, ensuring optimal engine performance. Regular servicing intervals should never be overlooked, especially for engine components that can be prone to oil leaks.
Common engine issues often relate to carburetion, so keeping the filtration system in check with regular changes of air and oil filters is essential for longevity. When it comes time for brake maintenance, don’t forget the importance of both front and rear brake services — a must for safety and performance. Tackle these potential issues proactively to enhance your GS ownership experience. Explore our cooling category for parts, and don’t forget about braking and filtration as essential upgrades for your classic ride!
Questions owners ask
What are some common problems I might encounter with the Citroen GS's hydro-pneumatic suspension?
The Citroen GS's hydro-pneumatic suspension is known for potential issues such as leaks and problems with height control. Regular fluid checks and servicing are critical to maintaining its performance. If you notice the car sagging or having difficulty adjusting its ride height, it's time to get it checked.
Where can I get parts for my Citroen GS 1977–1980 in NZ?
CARFIX stocks 27 SKUs for the Citroen GS 1977–1980. We stock parts in the [cooling](/shop/cooling), [braking](/shop/braking) and [filtration](/shop/filtration) categories. Check our website to find the parts you need to keep your GS running smoothly.
What are the common engine issues with the Citroen GS?
Common engine issues with the Citroen GS often relate to carburation problems or oil leaks. Maintaining the filtration system with regular air and oil filter changes is essential for engine longevity.
What should I check on my Citroen GS to pass a WOF in New Zealand?
For a WOF, the hydro-pneumatic suspension must function correctly, and the brakes and lights will be thoroughly checked. Any rust, especially in the sills and floor pans, will also be an issue.
How often should I service my Citroen GS?
The recommended service interval for the Citroen GS is every 10,000km. Regular servicing is crucial, especially for engine components that are prone to oil leaks.
At what mileage should I inspect the cooling system on my Citroen GS?
Around 150,000km, it's important to inspect the cooling system, including the water pump, thermostat, and radiator hoses, to ensure optimal engine performance.
What kind of engine does the Citroen GS have?
The Citroen GS features a flat-four air-cooled engine, providing both power and fuel efficiency.