RADIATOR CAPS AND HOSES

The rubber hoses in your cooling system allow for the movement and vibration between the engine, chassis and body. They make up the plumbing that connects each individual component together in the system. Coolant hoses must be capable of withstanding the pressure and heart generated in the system. They are also designed to resist softening from contact with the chemical found in coolant.

Possibly the most overlooked component in the cooling system, the radiator cap not only gives us a fill point for our cooling system. But its keep the system under a set pressure. The radiator cap is made up of a spring loaded pressure relief valve and also a vacuum valve that’s makes up the recovery system. You’ll find almost all 4WD will be fitted with a coolant recovery system the small overflow recovery tank fitted remotely in the engine bay and plumbed into the radiator just below the cap it’s to recalculate excess coolant as the engine operate. As the engine get hot, the pressure relief valve regulators the cooling system pressure and approx 12\15 psi. it allows coolant to bleed past cap into a recovery or overflow tank as it expands. Ones the coolant temperature drops. It’s drawn back into the radiator through the vacuum valve. Raising the pressure in the cooling system raises the boiling point of the coolant by approx 25C at operating temperature. Along with the coolant, this allows the system to deal with the engine’s heat more efficiently.