Radiator Frequently Asked Questions
Why should I use genuine coolant from my vehicle manufacturer?
The manufacturer's recommended product, used according to the directions and in correct concentration is very important. The correct coolant is vital to modern engines if you want to avoid expensive corrosion problems.
We also recommend when carrying out car maintenance, that you do not mix different coolants, as they won't necessarily be chemically compatible with each other. Mixing different types and brands of coolants may reduce their effectiveness in protecting the components of your car's cooling system. If you don't know what is in your system, have the system drained, flushed and refilled with the correct coolant/inhibitor for the car.
How often does the coolant need replacing?
There is no easy way to tell when coolant or corrosion inhibitor needs to be replaced. Don't be tempted to judge coolant concentration just by it's colour, as often it will appear to be alright even though the component of the mixture that protects your engine has been used up. It's best to follow the vehicle manufacturer's instructions regarding change intervals. Typically this is around every two years or 40,000km, but will vary.
Why is it dangerous to remove a radiator cap when the engine is hot?
It's extremely dangerous to remove the cap from a hot radiator as the coolant will be under pressure and the temperature will be well above boiling point. You should only check the coolant level when the engine is cold. Don't forget that if your car has a coolant recovery system the level must be checked in the recovery reservoir as well as in the radiator.
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