How hot does upper radiator hose get?

How hot does upper radiator hose get?

190–200 °F.
The upper radiator hose should be hot, around 190–200 °F. (The safest and most accurate way to get this temperature reading is with an infrared thermometer.) If the readings are correct, the thermostat is probably working properly.

Why is the top radiator hose hot?

I verified that my own car ran halfway up the gauge and that its lower radiator hose was warm, so clearly the thermostat on my car was opening and my gauge and sensor were working correctly. After we bled his system—which made no difference—I then began swapping cooling system parts with my car.

How much heat can a radiator hose take?

To withstand these extreme temperatures, most modern coolant hoses are now made from ethylene propylene EPDM rubber, which can endure operating temperatures ranging from -40 to +275 degrees F.

What should the temperature difference be between the upper and lower radiator hoses?

I consistently see between 20-25 degrees Celsius difference between the two temp sensor readings, be it traffic-driving or WOT to about 140mph pulls on a free stretch of road. Obviously the hotter / higher one is the upper radiator hose temp sensor, and the lower one from the lower radiator hose temp sensor.

Should my upper radiator hose be hard when engine is warm?

While the engine is warm after a drive, squeeze the radiator hoses, paying particular attention to areas where the hose bends. A radiator hose in good condition should feel firm, but not hard. A soft hose or a hose with a soft spot should be replaced.

Should my top radiator hose be hot?

The top radiator hose is usually but not always the location of the thermostat. Either way, the top hose gets hot after the thermostat has opened. The time the thermostat takes to open depends upon factors such as: Coolant temperature.

Should radiator cap get hot?

Doesn’t matter what the ambient air temp is, the radiator cap should be too hot to touch after a drive.

Should radiator hoses be hard when hot?

Why is my top radiator hose cold and bottom hot?

If the thermostat is open as it should, then you have another issue of no or low circulation in the system. This can be a restricted radiator or a water pump with worn off impeller fins. The radiator can be checked for hot and cold spots when it is running to see if it has plugged passages and needs replacement.

Should top radiator hose have pressure?

A radiator hose in good condition should feel firm, but not hard. A radiator hose in poor condition feels very hard, spongy, or soft. You may find a single soft spot as opposed to the entire hose being soft. A soft hose or a hose with a soft spot should be replaced.