Unstable operation of the cooling system
3 Causes of Cooling System Instability: Risks and XADO Solutions
A stable cooling system is vital for engine performance. If your car overheats, warms up too slowly, or runs at inconsistent temperatures, the cooling system may be unstable. Ignoring these signs can lead to costly repairs and reduced reliability.
3 Causes of Cooling System Instability
- Contamination inside the radiator: Rust, dirt, or deposits restrict coolant circulation. This often shows as the radiator warming only at the top while the bottom remains cold.
- External blockages: Leaves, soot, or dirt reduce airflow through the radiator, lowering cooling efficiency.
- Coolant leaks: Cracks in hoses, gaskets, or the radiator tank reduce fluid levels, causing overheating.
👉 Related issue? See our guide on Antifreeze Discoloration.
Risks of Ignoring Cooling System Problems
Unstable cooling isn’t just inconvenient — it’s dangerous. Risks include:
- Overheating leading to warped cylinder heads
- Reduced fuel efficiency due to poor temperature control
- Corrosion inside the radiator and engine block
- Costly repairs if leaks or pump failures worsen
For background on cooling system maintenance, see the AA’s guide on checking engine coolant.
XADO Solutions for Cooling System Instability
- Atomex Stop Leak Radiator — Seals cracks up to 0.9 mm, preventing coolant loss.
- XADO Flush Additive — Cleans internal deposits before refilling with fresh coolant.
- XADO Antifreeze — Provides long‑term protection against rust and overheating.
These treatments restore circulation, seal leaks, and protect against corrosion, ensuring stable cooling performance.
Preventing Future Cooling System Issues
- Check coolant levels regularly and top up with XADO Antifreeze.
- Flush the radiator every 30,000 miles to remove contaminants.
- Inspect hoses and gaskets for leaks.
- Ensure the thermostat and fan sensor are functioning correctly.
- Treat with XADO additives to extend system life.
👉 Explore more solutions in our Problem Solving blog series.
Properties of Atomex Stop Leak Radiator
- Prevents costly repairs by sealing minor leaks
- Safe for gaskets, hoses, aluminium, plastic, and steel radiators
- Provides long‑term protection against rust and corrosion
- Works in petrol and diesel engines
Application
- Warm up the engine to operating temperature (warm but not hot).
- Shake the can thoroughly.
- Switch off the engine and pour the product into the radiator tank.
- Start the engine and run at idle for 5–10 minutes with the interior heating on.
- Use immediately after changing coolant for maximum protection.
Note
Atomex Stop Leak Radiator is safe for catalytic converters, oxygen sensors, and rubber seals. Avoid contact with paintwork.