I am having problems with my 04 civic with 114k. It all started with a leaking radiator hose. I than lost fluid and added more fluid. Almost immediately i started to loose fluid from an explained leak. It appears that it is coming out of my expantion tank and was told that meant a new head gasket. Pulled plugs and they are all the same with normal usage. It passed compression test and also passed radiator fluid test for exhuast gases. Exhuast is not smoking and the tail pipe is dry. Water pump has been replaced and also I put a new radiator cap on it. Car is running normal and heat is strong. Fluid appears to be pouring out of the expantion tank or right side of the radiator. Any one else encounter this? I am stuck carless and help is needed asap!!!

 

Are you overfilling the overflow tank? If you overfill it, the excess amount you add in will boil out.

Could also be a bad radiator cap or a bad radiator.

 

Could be a cracked coolant reservoir, also. You might want to give it a look while you're sourcing the leak.