Coolant

Always use the right kind of antifreeze for your car and keep it at the correct strength, otherwise internal rust or sludge may result. Read more

Core plugs are also known as expansion plugs, welch plugs and sealing discs - a point to remember when buying one. Read more

A leak in the water-cooling system can be hard to trace - especially if it is internal, say in the cylinder-head gasket between cylinders . Read more

The flow of air into the car can be blocked by leaves or road debris in the supply tubes or in the plenum chamber. Read more

In a fully sealed cooling system , the cap on top of the radiator is not usually opened for topping up the system. Read more