Antifreeze leak

[Firstdue]

I have just noticed an antifreeze leak under my truck. It's comming from the over flow jug. It's not a lot but enough to leave a small puddle when it's parked overnight. I have no heating problems. It's powered by a 4.7 AT, A/C the truck has 43K miles.

Just wondering what would cause this and is there a fix to it?
Any help is greatly appreciated.

[BleedDodge]

Can you tell if the overflow tank is cracked? If it is it could be pulling in air and it will eventually pressurize. You have to find a way to fix it.

[fredjacksonsan]

Also, if you have air in the system it might release a small amount of fluid when a bubble clears the radiator. Big of small leak amount?

[KCcarbuff]

I had this same problem on my 03 4.7 QC - only at 38k miles. I took it to the stealership - they replaced the overflow tank and rad. cap. charged me $180. told me it wasn't under warranty and the cooling system wasn't part of the drive train - so didn't fall under the 7/70 warranty. My feeling - radiator cap was defective(wouldn't hold pressure), but how do I argue once its done. If I had to do it again - or would have followed my own hunch - I would go buy a new rad. cap and try that. I still believe the tank is just a tank, only under pressure now - if the tank had a leak it would leak out of it - not the overflow hose. my $.02. I did not have a heat problem either, for a long time, but eventually enough coolant was lost and it happened - I had to add over 7 quarts of coolant/water to get filled back up. Those small puddles add up over the months.