2004 honda civic lx overheating?

Question

Well still having troubles..., replaced the thermostat, water pump, sensor, fan motor, and still it boils out all the fluid, The last thing I think it could possibly be is the radiator, which seems fine. There's no fluid in the oil, and my exhaust isn't even slightly moist, any thoughts?

Answer 1

There are a few other things you might want to check. The first is that radiator that you mention. Is there any trace of white powder or minerals around the top of the radiator tank? When the radiator leaks it is usually at the top plastic tank. You don't see a leak because the coolant leaves as steam when you're driving. the minerals usually condense around the tank and look white to the eye.

if you don't see that, then have a shop do a pressure test on the cooling system to see if its loosing pressure. the problem could show up when the system is under pressure but not under normal operating conditions. Most shops will charge under $20 to do a pressure test. That test would immediately show any leaks from hose clamps and connections.

Be sure to have the radiator cap pressure checked as well because a cap that doesn't hold pressure will reduce the boiling point of the coolant and cause the car to boil out coolant. also, check the radiator overflow jug as that could be leaking and causing the coolant loss.

You will also want to check the right front floor to see if its wet behind the carpet. If it is, your leak would be from the area of the heater core. Again, you wouldn't see a leak outside.

another respondent said to bleed the cooling system. You have to jack up the front of the car so that the top of the radiator is above the top of the firewall to do this if you don't have the special tool made to do this. when you jack the front of the car up then you can run the engine to get the air out of the system. air in the system would not cause the car to lose coolant; it would cause overheating, most likely to be seen as a fluctuating temperature gauge.

You don't mention if the engine is running hot or if it is just losing coolant then running hot because of the low coolant level. Everything you've done so far is to fix overheating, not to fix coolant loss.

so, have the system pressure tested then determine if you're after a coolant loss problem or an overheating problem after you determine if the system is losing pressure.

Answer 2

04 Civic Overheating

Answer 3

Yeah, something is up with your radiator fan. Either the motor is dead or a relay. As for the AC problem, that's your Idle-up system. It's either a valve or a switch that tells the engine to idle up because the AC is on.

Answer 4

i think that you may have some air trapped in the cooling system try getting the air out and see how it is !