there could be to problems the lines vcould be airlocked or there isnot enought coolant in Bad water pump. Incorrect thermostat or installed upside down. Spring goes toward engine. Cooling fan not working due to blown fuse, bad fan motor, or defective thermal relay. And possibly air in the system. Bleed the system by using bleeder valves if equipped or by jacking up the front of the car, and removing the radiator car,(Engine Cold), start the engine and let it run until no more air escapes. Keep it full.
Check the radiator fan operation.
Try replacing the radiator fuse relay
First you need to run the engine until the thermostat opens, you will see the water running through the radiator. the coolant will go down into the radiator You need to continue to add coolant until you don't see anymore air coming up, or coolant go down into the radiator maybe three times that the thermostat opens. When you have got most of the air out you will see the water running inside of the radiator then stop when the thermostat closes. Cycle it two or three times to be sure.
Your thermostat might be stuck open. Does the radiator cap get hot after running the engine for 10-15 minutes? If not, replace the thermostat.
Thermostat and radiator
That depends on the thermostat. If it's a 185 thermostat, the engine should run at 185. If it's running too hot, check the thermostat, radiator and water pump. If it's running too cold, replace the thermostat.
This is likely a stuck thermostat.
Coolant level low? Check when cold Cooling fan not working? Thermostat not opening? Dirty or clogged radiator? Bad radiator Cap? Water pump bad?
Make sure the radiator is full of water, don't just check the overflow tank, but do make sure the car is cold before removing the radiator cap. Also the thermostat could be frozen closed or you could have a failed water pump. Try replacing the thermostat and flushing the cooling system first. Don't forget to buy a thermostat gasket when purchasing the thermostat.
Your cooling system needs to be bled out real simple process depending on the size of the motor but the only thing is wrong is that once the radiator was removed air got in your cooling lines and needs to be bled out
Either: 1) Thermostat is bad or 2) Radiator is clogged or 3) if your losing fluid or hearing a noise, check your water pump. If your not losing fluid or hearing a noise, the service the radiator by having it flushed. If this doesn't solve your problem, then change the thermostat. If your still having the problem then your radiator may need further service or even replacing. I'm having the same issue right now. I'm replacing my thermostat next. If it still is running hot, I'm going to take the radiator out and have it serviced. Good luck! And remember, DONT let the temperature get in the red!!
broken thermostat; blocked hose to radiator or hole in hose; leak in radiator; etc..
only time a thermostat needs replacing is if it doesnt workgenerally when they quit, the engine will over heatthis is caused by the thermostat not opening properlyeasiest way to test this is to get engine to running tempthen with engine running a little faster than idle, remove radiator cap and look to see if the coolant is circulating in radiatorif no circulation, the thermostat has not opened and needs replacementonly other way to test is to remove thermostat from engine and test in bioiling waterbut if you do that, u may as well replace it while it is out
coolant only flows through top hose when engine is at normal operating temp.. so u have the wrong thermostat, or no coolant in the rad.... Or the water pump has failed and is not pumping the water.
Radiator fan inoperative, thermostat stuck closed, coolant low, radiator restriction, etc.
For a 2.4 litre engine, where the pressure cap is that is the thermostat housing..if you try to remove the pressure cap (in cold temperature only) you will see the thermostat..A damaged thermostat can be diagnosed when an engine running is at above normal temperature by squeezing the radiator hose connected to the thermostat housing..if there is no coolant running in it the thermostat is close then replace it.
Thermostat failed in open position or radiator fan permanently on
The cooling system is bled using the bleeder screw found on the thermostat housing. To find the thermostat housing on a 1998 Honda Civic follow the lower radiator hose to its outlet. While the cooling system is running loosen the bleed valve. When bubbles stop coming out the system has been bled.
Thermostat is stuck.. Is the cooling fans coming on at 232 degrees? Is the radiator sludged up?
Low coolant, failed water pump, thermostat, plugged radiator, inoperative radiator fan, head/head gasket.
First of all, check the thermostat, the radiator fan, radiator hoses, water pump, radiator leaks. P.s. If you install a radiator fan universal and it don't place really close to the radiator, you can have that problem
I would start off with replacing the radiator cap if it don't have one then the cap on the refill tank ,this may fix your problem .
If the question is: why does your top radiator hose get soft while the engine is running? If that's what u want to know, it's because the thermostat in the engine opens to flow the coolant thru the motor to keep the operating temperature from getting to hot. It's stores water in the radiator which cools the water and the thermostat blocks it until a predetermined temp.
Driver side of the motor behind the distributor and below the air intake hose. You will see the hose running from the radiator. There will be 12mm bolts that hold the cover and the thermostat will be in there.
if you have heat and and it is working OK. and if you squeeze the lower radiator return hose and feel water flowing. most likely it is the electronic fan not coming on.