• Nov 29, 2025 2002 ford f150 ford 5 4l heater hose diagram er Hose: Connects the engine’s cylinder head or intake manifold to the heater core inlet. Lower Heater Hose: Connects the heater core outlet back to the engine’s cooling system, often near the water pump or thermostat housing. Below is a simplified diagram description: The upper heater By Dr. Kameron Anderson-Keebler
