How much coolant nees to be drained for...

[Beaver]

You guys rock! Thanks for all the quick responses! I ended up just cleaning it on the truck. Removed everything from the intake side of the block to the egr cooler an dcleaned it all. Not crazy bad but definitely needed to be done. We will see how she runs tomorrow. For some reason I cant post a picture from my gallery, its making me take a new pic. I will try to up load what the intake manifold and inside the motor looked like before I started cleaning.
I can't believe how little flow there is from the manifold! Any little bit of build up was definitely choking it out some! BTW...2013 peterbilt 388 car hauler is what I got. Excited to do this myself! Rawze....I can't thank you enough for what you do. I'm gonna try and get some $$ sent to the cause next month!