Honda Car Forum

My car overheats when I drive for an extended time and then idle, like in traffic or something.I've never seen the radiator fan turn (even when running hot), but I have checked the fan motor with a battery and it is not the issue.Some other facts:Yes, there is coolant in the system.I've checked, and replaced the relay - it is not the problem.I've checked, and replaced the fuse - it is not the problem.The indicator on the dashboard is working and tells me that it is overheating.So I've heard that there are several other areas for inspection - thermostats, switches, etc. Can you help me find the culprit?Thanks.Do people even bother to read the full question?The relay is working.There is no coolant leaking.Check my oil for what - Gremlins? I change my oil every 3k miles and check the level every other pit stop as is commonly recommended.

That mean save your money and get u a new damn car and let go of that old shit and upgrade

The fan should work when the temp goes above the specified limit, Since you do not provide info on the particular car,. I cannot tell you if is either 180 or 210 degrees.The elements that make the system are:1.- the temp switch2.- the fan3.- The relay4.- In some cars the computer gets the signal from the switch or directly from the temp sensor, and then send the signal to the fan. In those cases, the computer could also be the problem.

The fan should definitely be running, especially when hot. Most likely it is the fan relay. Replace this relay and see if it works.

I would bet that you have not checked the bottom radiator hose.It sounds like your bottom hose is collapsing at highway speed (high RPMs).What happens in this case is the wire inside if the hose has rusted away,and this allows the vacuum to collapse the hose stopping the circulation of the coolant.This happened to me on my way from Missouri to Fla. several years ago.If it is not that,and you have checked everything else,it must be the water pump,because if it was a head gasket,you would be losing coolant.So it has to be either the bottom hose or the water pump.

If it overheats and it is causing you a problem it might be the water pump. When was the last time you got it changed also if it's not the radiator then is it leaking from anywhere and check your oil.

first i like the lower radiator hose thing. had never heard of that but its possible. here's my list of suggestions: 1. radiator is not working effectively as the cooling fins have started to corrode. this would cause the car to be fine at highway speeds when there is more than enough air flow. i experienced this a few years back. hence, replace radiator. 2. thermocoupler is not functioning hence the radiator fan is not coming on. 3. clog in system that slows down movement of af which would show up worse at idle with no air movement. 4. water pump is really bad and has worn out impellers causing weak flow. i kind of doubt this but it is possible. 5. old coolant that reduces cooling effectiveness. good luck.

i have to said it the fan switch it location is by the side of the oil filter it have a two connector on it should be to the leftthere are two of them first one have 1 connector is the stock oil presser unit and the 2nd one is the fan switch if the fuse is good the relay is only for the ac unit since it the fan switchu should change the thermostats

Maybe you have a crack in your radiator. Sometimes even small thin hairline cracks would make your car run hot. I had that trouble before. You should just take it to your mechanic before you crack your engine.

Hey dude All the above.......Then Check the Water temp with a thermometer, this will tell you at what temp your thermostat opens, with that you can tell by the elapsed time the condition of the water pump. then with the motor hot replace the radiator cap and check time to system pressure, and check lower rad hose for collapse