There will never be a need to remove the cooler for bleeding. In fact, what I learned during the bleeding process following my hydro assist install this spring is that filling the system and going through the FSM process of turning the wheel lock to lock with engine off 50-60 times and then letting it sit overnight to allow remaining air to rise up to the reservoir works very well. I was working at the bleeding process for 15-20 minutes and experiencing lots of fluid foaming and pump cavitation when the wife called me in for dinner. The rig sat over night. The next morning I went out to resume the process and much to my pleasure, bubbles and pump noise were no longer happening. Keep in mind my system is rather complicated what with a brake hydro booster, aftermarket reservoir, hydro cylinder and the derailed cooler. Lots of hoses. You are very meticulous, nice work.