REDOX Silicone Coolant Hose Citroën GS Birotor Wankel Engine 1973-1975

Definition and Technical Specifications

This high-performance silicone hose is specifically designed for the cooling system of the Comotor 624 Wankel twin-rotor engine powering the Citroën GS Birotor. Manufactured from reinforced 3-ply VMQ silicone with 4mm wall thickness, it guarantees perfect sealing and exceptional longevity under the extreme conditions of the rotary engine.

VMQ silicone offers temperature resistance from -50°C to +180°C, far superior to original rubber hoses that degrade over time and through thermal cycles. The 3-ply construction ensures optimal burst resistance while maintaining the flexibility necessary for installation.

Applications and Compatibility

This hose is exclusively compatible with the Citroën GS Birotor produced between 1973 and 1975, an exceptional vehicle equipped with the Comotor 624 Wankel rotary engine of 995 cc³ developing 107 DIN horsepower. Only 847 examples of this revolutionary model were produced, making it a true collector's car today with approximately 250 survivors worldwide.

The Comotor 624 engine is water-cooled, with a 9-litre circuit controlled by two electric fans. This specific cooling system requires reliable hoses to maintain optimal engine temperature and prevent overheating of the rotary engine. The GS Birotor differs from other GS models by its transverse engine and unique technical architecture inherited from the NSU-Citroën partnership.

Benefits of Permanent Stock and Fast Delivery

REDOX maintains permanent stock of this rare reference for collectors and enthusiasts of classic Citroën vehicles. Any order placed before 5pm is dispatched the same day from our French warehouse. GLS delivery takes place within 24 to 48 hours to France and major European countries.

Our permanent stock commitment guarantees you immediate availability of this part that has become unavailable from classic automotive suppliers. No more weeks of waiting or unsuccessful searches for compatible hoses for your GS Birotor.

Main Technical Features

• Material: Premium automotive grade VMQ silicone
• Construction: 3-ply reinforced
• Wall thickness: 4mm
• Temperature range: -50°C to +180°C
• Available colours: Black, blue, red
• Warranty: Lifetime REDOX
• Installation: Direct replacement for original hoses
• Resistance: Modern coolants and LHM
• Durability: Minimum 15 years without degradation

The hose mounts in place of the original, without modifications. Hose clamps are included for immediate installation.

Frequently Asked Questions (FAQ)

1. Is this hose really compatible with my 1974 GS Birotor?

Yes, our hose is specifically developed for the Comotor 624 engine of the GS Birotor produced between 1973 and 1975. It respects the original dimensions and shapes for perfect fitment on all 847 units produced.

2. Why choose silicone rather than original rubber?

Silicone offers three times longer lifespan than rubber, fears neither aging nor cracking. It better withstands the extreme temperatures of the Wankel engine and remains flexible even after years, unlike rubber which hardens and eventually leaks.

3. Does the hose resist Citroën-specific LHM fluid?

Absolutely. Our VMQ silicone is compatible with all modern coolants as well as LHM used in Citroën hydraulic systems. No risk of chemical degradation.

4. Does installation require special tools?

No, installation is performed with standard tools: 7-13mm wrenches, regular screwdrivers and a 5-litre drain pan. We recommend taking advantage of the replacement to renew the coolant. Installation instructions are provided.

5. What's the difference with hoses from flat-4 engine GS models?

The GS Birotor has a water-cooling circuit specific to the Wankel engine, while standard GS models have an air-cooled flat-4 engine. The hoses are therefore not interchangeable between the two versions.

6. Can we order different colours to customize my engine?

Yes, we offer three colours: black (original look), blue and red. You can choose your preferred colour when ordering. For purist collectors, we recommend black which respects the original aesthetics.

7. How long does the REDOX lifetime warranty last?

The lifetime warranty covers all manufacturing and material defects without time limitation. It applies as long as you own the vehicle. In practice, our silicone hoses easily last 15 years and more without any problems.

8. Do you deliver throughout Europe for this rare model?

Yes, we deliver throughout Europe via GLS. France, Germany and UK: 24-48h. Rest of Europe: 3-4 days. We also ship outside Europe upon request. Real-time tracking by email and SMS is automatically sent.