I have a 2001 honda civic that continues to get hot when i am sitting and idling for more then 3 minutes or so. Then when I rev the motor or start to drive down the road the temperature will return to normal. I replaced the thermostat but it still has the same problem, although since I replaced the thermostat it seems to not get hot as fast as it used to. I am thinking maybe I got a defective thermostat or possibly the water pump is out. Just wondering if anyone else has encountered a similar problem.

Thanks

 

Any Cels? is your fan working?

 

water pump,fans,head gasket, temperature sensor,radiator flush or more who knows..

 

Did try burping your rad? Is the fan coming on, if not check the relay?

 

Usually when the car gets hot when sitting, and cools off when driving, it's a fan issue.

Check if it turns on when sitting and getting hot. If not, there's your problem. I had the fuse go on mine once.

 

Check fan(s) if they're good then its a head gasket.

 

did you change your coolant recently? try burping the air out?

i would say water pump but the OEM water pump has metal fins so i don't think there's a problem w/ broken fins...

 

your thermostat isnt opening.

 

i've got an '02 d17a1, same problem, just needed to top up coolant cause i've got a leaky head gasket. i'm getting oil in my coolant res but have'nt seen any coolant in my oil