How to know if your radiator hoses are hot or cold?
Start the car from cold, run the engine for 10 minutes or so and check that one hoses is warm and the other cold. That indicates the stat is closed as it should be, so far so good. Now drive the vehicle until normal operating temperature is reached. Shut off the engine and check both hoses, they should now both be warm.
Why is my car overheating with no heat from heater?
You also might have an internal coolant leak inside the engine like a head gasket causing the overheating. Now, if the upper radiator hose is hot but the lower hose and the heater hoses are cold then try a new thermostat and see if the issue is repaired or not.
How can I tell if my car heater is hot?
Follow the upper radiator hose to where it connects to the engine. The thermostat housing is what the hose attaches to. Is the upper hose hot now that the engine is at normal temp, it should be. If the upper hose is hot, then feel the lower radiator hose, it should be about the same temp.
When is the top of the radiator supposed to be hot?
Either-way, the top hose gets hot after the thermostat has opened. The time the thermostat takes to open depends upon factors such as: In this post you’ll learn how the coolant system works, when the top hose should get hot and what you should do if it doesn’t. The coolant system after the oil system is the next most critical system.
Is the lower radiator hose hot or cold?
The upper radiator hose is extremely hot, the lower radiator hose is cold. The thermostat has been replaced 3 times now. They have all been put in boiling water, and they all opened. The car has been parked on an inclined and filled with coolant, been jacked up and filled, we’ve used the cap to vent, we’ve used the bleeder to vent.
Can a bad radiator hose cause an engine to overheat?
2. Engine overheating. The vehicle’s engine should not overheat, so as soon as you notice this symptom, it means something is wrong with the cooling system. The radiator hose may be to blame because they crack and leak over the years from the high heat and pressure they are exposed to.
You also might have an internal coolant leak inside the engine like a head gasket causing the overheating. Now, if the upper radiator hose is hot but the lower hose and the heater hoses are cold then try a new thermostat and see if the issue is repaired or not.
Follow the upper radiator hose to where it connects to the engine. The thermostat housing is what the hose attaches to. Is the upper hose hot now that the engine is at normal temp, it should be. If the upper hose is hot, then feel the lower radiator hose, it should be about the same temp.