carry coolant between the engine water jackets and the radiator. Being flexible, hoses can
withstand the vibration and rocking of the engine without breaking.
radiator hose normally connects to the thermostat housing on the intake manifold or
cylinder head. The other end of the hose fits on the radiator. The lower hose connects the
water pump inlet and the radiator.
A molded hose
is manufactured into a special shape with bends to clean the parts especially the cooling
fan. It must be purchased to fit the exact year and make of the vehicle.
hose has an accordion shape and can be bent to different angles. The pleated construction
allows the hose to bend without collapsing and blocking coolant flow. It is also known as
a universal type radiator hose.
A hose spring
is used in the lower radiator hose to prevent its collapse. The lower hose is exposed to
suction from the water pump. The spring assures that the inner lining of the hose does NOT
tear away, close up, and stop circulation.