coolant lost after head gasket job..

My 2007 2.7 Tacoma I noticed the other day the coolant was kinda low no visible leaks that I see. So I filled to up and ran the truck like normal. The temperature gauge stayed normal no climbing or overheating I was watching that all day. I recently did the head gasket due to a burn valve in the exhaust and a bent intake valve. Changed everything related to the cooling system. So this morning I checked the coolant level again I was a little low again! Also the coolant overflow bottle was filled past the full line! Anybody else had this problem?

 

Possible air pocket from refilling cooling system after repairs?

 

Gotta be air in system. Raise the front end while burping system.

 

After checking the cooling system found out that the radiator cap was the one that was leaking! Cap was not even a month old!