I was wondering if there was a valve to open to drain the coolant on my 6.7L or do u just pull a hose. I wanna install an EGR delete on the donkey.

 

just pull off the cooler when the motor is cooler.

 

I can see that making a mess.

 

You wont lose much coolant at all i wouldnt even think about draning it the cooler holds more fluid then you will drop just sayin just keep the lines elevated and it works fine. and has worked fine on everytruck i have deleted and its not just 1 truck

 

You may loose a cup of fluid, I've done quite a few and never lost much on any of the trucks

 

There's a drain on the bottom of the radiator, on the drivers side.