If anything how serious is an antifreeze leak? i was cleaning my whole engine bay today and i noticed that the path where the antifreeze flows about under my battery near my radiator there was a leak. The leak looks like it happened because of pressure, it was dry and im not exactly sure what caused it. My antifreeze isnt over the limit its supposed to be either.

 

You should find where it's coming from. It could be your over flow from the coolant tank or something serious.

 

ill try and get some pictures tommorow in the day. What could be a serious problem. And as i pay attention to my car the only thing ive heard is a knock coming from my headers. as i accelerate the knock increases in speed. im not sure if thats a problem or not. No CEL or anything on. car doesnt have problems starting driving. Just synchro problems thats about it

 

Well if your leaking coolant into the engine then you will need a new motor.