join the inlet and outlet hoses together.
just pull the hoses off the heater core and put them together easy all done under the hood. Mike join the 2 hoses together
2 radiator hoses / the top radiator hose comes from the engine thermostat / and the bottom radiator hose returns to the engine water pump
Lower radiator hoses in water cooled engines are return lines. The upper radiator hoses are feed lines of hot engine water to the radiator. The reason that lower hoses are cooler is that the radiator has allowed much of the water's heat to dissipate into the air. Thus, a lower radiator hose contains cooler water than other radiator and heater hose lines.
Radiator cap
the hoses leading to and from your radiator might be clogged. If you had a rusty radiator, the rust may have clogged the hoses that carry the coolant. you should check all your hoses and even flush them out.
Radiator hoses? Heater hoses? Vacuum hoses? EVAP hoses? Need more info to help you.
Radiator hoses and heater hoses should be inspected yearly and replaced when neccessary.
Waterpump, thermostat, radiator, radiator hoses.
Low on coolant and/or a faulty radiator cap.
If the hoses are all tight, Then the radiator must be leaking. REPLACE RADIATOR
fatigue