Heater Hose Replacement
What is a heater hose?
Heater hoses carry engine coolant from the engine to the heater core. There is one inlet hose, and one outlet hose. On older vehicles, the inlet hose may be split into two segments, separated by a heater control valve.
How does the heater hose work?
All engine cooling system hoses work the same way. They are pressed onto a connector at both ends, and either clamped, or sealed with an O-ring type seal. This provides a watertight seal between the two components being connected.
Coolant hoses can be damaged by oil leaks. The issue should be addressed in order to avoid damaging the new hoses.