Had a customer bring in an '05 chevy that was pressurizing the cooling system. In fifteen seconds of running it would build enough pressure to puke about a half gallon of coolant when the rad cap was removed. Plan is to install upgraded head gaskets, studs and EGR delete kit. With as much stuff as there is on top of these engines and as tight as the engine bays are we decided to pull the bullet for the upgrades. I shot a few pics as I went.