Should the lower radiator hose be hot or cold?
The engine needs to be really hot and almost overheat before the thermostat lets the coolant pass by. If your car is not overheating, but the lower coolant hose is cold when you feel it – it may just mean that it is not hot enough, and therefore there is nothing wrong with your engine.
What is the temperature drop across a radiator?
RADIATOR Though many people believe that the radiator cools the engine, it is actually the liquid coolant’s task to cool the engine, and it is the radiator’s job to cool the liquid. An efficient radiator will drop the temperature of the coolant approximately 20 degrees Fahrenheit when the engine is under load.
Should both heater hoses be hot?
Cabin heat comes from hot coolant, so drive long enough to warm up the engine. If coolant temperature is acceptable, feel both heater hoses, which should be hot.
How many degrees should a radiator cool?
As a general rule, cooling systems are designed to operate with a coolant temperature of about 190 degrees F at the radiator inlet and have about a 10 degree F temperature drop through the radiator at rated power and rated coolant flow. This will result in a bottom tank temperature of 180 degrees F.
How do I know if my radiator temperature is dropping?
If the fan is working properly but the engine is still running hot, scan the entire surface of the radiator to check for clogs. Temperature readings should decrease evenly from one side to the other on a crossflow radiator, or from top to bottom on a downflow radiator.
How to replace the temperature sensor on a Toyota Camry?
Reverse the above steps for installation, refill the radiator with new fluid, start engine until warmed up and recheck fluid levels after cool down. Allowing the engine to idle for 1/2 hour with the radiator cap off can help remove air pockets. 2. Replacing the Temperature Sensor
How to remove the thermostat housing on a Toyota Camry?
A 10 mm box wrench can be used on the top nut, but there is very little twisting room for the lower nut unless the oil filter is removed. 4. Remove the thermostat housing with a strong tugging or pulling motion. Approximately 1/2 gallon of coolant will leak out when the housing is removed.
Is the lower radiator hose cold or hot?
After the engine has warmed up (as warm as it is going to get), the upper radiator hose is hot, the heater core hoses are hot, the little bypass hose is hot, the lower radiator hose is cold/barely warm. Coolant level is fine.
Why is the bottom of the radiator warmer than the top?
The bottom radiator hose is a lot warmer now (which indicates the radiator is not plugged and the pump is circulating coolant), but engine temp is even colder than before. I can also now see the coolant churning up in the top of the radiator, with the cap off. When I turn the heater on, the engine temp will drop a little bit too.