i keep running out of coolant. I refill it and a cuple days later its out again. I am not leaking and my temp is not overheating. any clues ?

 

check the exhaust gases as soon ASAP. if u see thick white smoke than u have blown ur head gasket. the coolant is getting burned and pumped through the exhaust system. i had the same problem with my first civic.

 

Here's another thing to check. If you don't see the white smoke from the tailpipe, check your oil filler cap. Take it off and check to see if there is a white dusty film of some sort on the cap or around the opening. Also, pull the oil dip stick to see if there is any drops of water on the stick. That is also another sign of coolant leaking into the engine somewhere. But if what your talking about is coolant resivoir being empty, it's most likely to be your radiator cap. Check to see if the cap's rubber gasket is cracked, missing, or expanded past the metal piece it covers. Hope this might help.. Good Luck.. But hey, be careful when you pop open your radiator cap. I'm not responsible for any mishaps. Do this at your own risk..

 

yea i know to open the cap when the car is COLD. and it is my radiator resivor that is going empty. i don't see the white smoke in the exhaust