I fired the Evo up the other evening and noticed that I had a good amount of air coming from the valve cover. It was very cold out so you can see the air blowing out of the vent. The car is fully built with forged pistons could this be that they just need to warm up, expand and seal better? Check it out and let me know what you guys think. Also if you listen into the background there is a very defined tapping noise maybe piston slap? Thanks ahead of time!

Crank Case Pressure