Looking After the CX
Let’s start with some fantastic news on the CX: its engine, transmission, and hydraulics are impressively reliable, having already been well-tested for 20 years on the DS. However, it’s wise to keep an eye on the Diravi steering system, as it can occasionally develop internal or external leaks. Over time, the hydraulic fluid return hoses may dry out and crack. Additionally, the front suspension rods and bushings, along with the rear suspension arm bearings, may require replacement after all these years.
Here’s the catch: the superstructure and subframe are susceptible to rust, so the first areas to check are the underbody, wings, and boot. The interior trims, plastics, and upholstery—particularly the fabric—might not age as gracefully as hoped. Electrical issues may also arise as cables and sockets wear, leading to rusty ground points.
On the bright side, the CX boasts a high survival rate, making it relatively easy to source second-hand spare parts for restoration and maintenance. Many mechanical components are re-fabricated and may even be compatible with other French vehicles from that era.
For additional insights on buying and maintaining a CX, explore clubs and enthusiast websites, or join a community. Just a heads-up: some resources may not be available in English. Here are a couple of dedicated sites:
Key Data for Routine Maintenance of Your CX 25 Automatic
- Fuel tank: 68 litres petrol.
- Engine lubricant: 5.45 litres 15W40 or 20W50 semi-synthetic or mineral oil (4.75 litres if the filter is not replaced).
- Transmission lubricant: 6 litres automatic-gearbox oil (e.g., Dexron II or TOTAL FLUIDE G3).
- Hydraulic circuit: 5.3 litres LHM.
- Engine coolant: 12.5 litres.
- Spark plugs: Champion L82YC / EYQUEM 755 SX (gap 0,8-0,9 mm).
- Battery: 400/65 Ah.
- Tyres: 195/70 R14 MXV Michelin. Recommended pressure front/rear: 2.4/2.0 psi.
- Suspension spheres pressure front/rear: 75/40 bars.
Low-Mileage Operating Intervals
- Yearly (max. 10,000 km): change the oil, lubricate doors, bonnet, and boot lid.
- Every 2 years: yearly maintenance + change filter (max. 10,000 km), renew water coolant.
- Every 4 years: 2-year maintenance + replace spark plugs, clean or replace air filter (max. 30,000 km), renew LHM (max. 60,000 km) and clean its filter (max. 30,000 km), renew gearbox oil (max. 50,000 km), replace petrol filter. Check/adjust/replace: all driving belts, 5 hydropneumatic spheres, brake pads, handbrake, clutch, hydraulic hose connections, ground clearance, front suspension, and steering components.
- Every 10 years: 2-year maintenance + replace the timing chain (max. 80,000 km), check/adjust/replace: brake pads, front suspension rods, and rear arms (for negative camber), all fuel and injection pipes.
- Every 15,000 km: adjust the valve/tappet clearance.