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.
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.
First you need to make sure it is actually not heating up. Do this by checking to see if the radiator hoses are getting warm after running for 10-15 min. Be careful they could be HOT. If the hoses are hot then the heater core is plugged and will need to be replaced. If hoses do in fact not get hot then the thermostat is most likely stuck open. removing it will tell the tale.
The radiator may not be getting hot due to a lack of coolant, a faulty thermostat, air pockets in the cooling system, or a malfunctioning water pump. It is important to check these components to determine the cause of the issue.
Check the heater hoses on the right side of the engine. If one hose is hot and the other is not , you might have a blocked heater core. Or the blend door actuator might not be operating correctly.
check your radiator hoses to make sure theres no leak, you may need to flush ur engine and replace the freeze plugs
Have you replaced the thermostat? The water in radiator should not be boiling! ------------------------------------------------------------------------------------------------------ Is your cooling fan/viscous clutch working ? (Helpfull)
could be a number of things radiator,thermostat,water pump heater core, low coolant old coolant bad hoses,
GOOD CHANCE THAT THE WATER PUMP CRAPPED OUT.Replace the radiator cap. my car has 2 bleeders on the hoses get the air out
hello Can you tell me why the heater on my 2002 toyota yaris isnt working? Ive changed the thermostat,flushed out the radiator and also the heater matrix behind the dashboard is getting red hot as well
The radiator cap may not be getting hot because it is located in a separate reservoir from the radiator itself. It is designed to maintain pressure within the cooling system and does not directly contact the hot engine coolant.
Radiator clogged? Radiator air flow restricted? Bad radiator cap? bad water pump? Cooling fan not working?