I have 94 Civic that is overheating on idle. i don't have AC so I don't think that is a problem. I have GSR Radiator, new thermostat, new thermal switch, new relays and fan turns on directly on battery. THe problem is fan does not come on during idle or when the car gets hot. Overheats when im in traffic or when the car is idling. What can be the problem?
Civic OVERHEATING!!!
- Thread starter bucdenny
- Start date
Could be a possible bad water pump or a head gasket that is leaking or blown
check the tempature sensor, my car used to do that
Check your relay sensor. If you blew a headgasket from overheating your oil will be milky and your coolant brown. Your exhaust will also be white.
I am a tech for Honda and u dont have to see it in the oil to have a blown head gasket. The temp sensor is located under the distributor. The radiator fan switch is located in the back of the block next to your oil presure switch and if it is not working then the fan will not come on, to test it just unplug the harness to the switch and then take a piece of wire or a paper clip and jump the 2 connecters on the harness if the fans come on then u know it is the fan switch that is bad if not then u have a short in the harness and have to track it down because u said the fans come on with straight power when hooked to the battery.
Good luck man and keep us posted on how things work out!
im talking about the sensor thats located by the lower radiator hose on the water neck
Well from experience
I have a 94 civic also and a little over a year ago i was having the same problem as you. Car was overheating on idle blah blah blah. Went and got the thermostat checked out and replaced first. Car ran find for about a week then out of nowhere it started overheating again. One of the mechanics i take my car to said it could either be the water pump or the head gasket. Had the water pump checked out first... then had the head gasket checked. Sure enough it was the head gasket. Unfortunatly by that time my best bet was to go ahead and replace my engine b/c of the damage. My car never smoked during that nor did the oil seem dirty. However something that did happen was my coolent was always at the top of my overflow tank for some reason. Not sure if yours is doing that or not.
Hopefully im wrong tho cause i'd hate for you to have to go through the same crap i went through.
I have a 94 civic also and a little over a year ago i was having the same problem as you. Car was overheating on idle blah blah blah. Went and got the thermostat checked out and replaced first. Car ran find for about a week then out of nowhere it started overheating again. One of the mechanics i take my car to said it could either be the water pump or the head gasket. Had the water pump checked out first... then had the head gasket checked. Sure enough it was the head gasket. Unfortunatly by that time my best bet was to go ahead and replace my engine b/c of the damage. My car never smoked during that nor did the oil seem dirty. However something that did happen was my coolent was always at the top of my overflow tank for some reason. Not sure if yours is doing that or not.
Hopefully im wrong tho cause i'd hate for you to have to go through the same crap i went through.
I had that problem before. I think the head was cracked. all i know was that water was going into the cylinders and all that bad stuff. Man I paid $970 to fix her. The previous owners used and abused her. 
but yea, I think it should be the head gasket. Cuz for me, we couldn't figure it out. We put in a new radiator and thermostat. Flushed the coolant a few times. If I were you, I wouldn't drive her around until it's fixed. Trust me. i've been through this ish.
but yea, I think it should be the head gasket. Cuz for me, we couldn't figure it out. We put in a new radiator and thermostat. Flushed the coolant a few times. If I were you, I wouldn't drive her around until it's fixed. Trust me. i've been through this ish.So u tested the two wires and and the fan turned on is that correct? If so U have to change the radiator fan switch that u unpluged the wires from that is your cause of the fans not coming on when they r supposed to but if u are still over heating after that and the fans come on then I would look in to getting a cooling system presure test if it is not holding pressure then u have to start eliminating items in the cooling system starting with a raditor flush and so for.
U can reach me on AIM if u have any questions.
U can reach me on AIM if u have any questions.
FANATTIC8228
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jdmegcoupe said:
it's a sensor
