I'm prepping the cooling system of The Beast for startup and was double-checking the hoses. One of the hoses, from the end of the manifold to the heater, is collapsing, which is no good. So I thought maybe I had it swapped with another one accidentally. I removed both, and then a few minutes later I saw that the pipe at the end of the heater was filled with coolant. Whoops.
This was the end near the solenoid so I really didn't want it to come out that way. I figured it was only a little water so I used my air hose to push it back out, and it spilled out the driver's side pipe (near the brake MC). It was gushing out, and then, possibly due to the angle of the dangle, all the liquid then flowed down the firewall shelf towards the solenoid ANYWAY...
Then, the original pipe filled back up.
I realized I needed to capture the liquid - and duh, I have HOSES. I grabbed the old hose and stuck the other end in a soda bottle. I squired some air in the driver's side pipe and it came out in the soda bottle with some leakage, but not bad.
But THEN when I turned off the air, liquid SPRAYED back out the driver's side end. WTF?!
After a few non-humorous rounds, I removed the soda bottle, and realized what was happening - the hose was so tight in the neck of the bottle that it was almost airtight. The air hose was actually INFLATING the soda bottle a little bit. When I turned off the air, it deflated, spraying water back out.
I replaced the soda bottle with a mayo jar (or maybe a tomato sauce jar, irrelevant) with a wide mouth, and more successfully pushed the remains of the water into the jar.
Cleanup took way too long and way too many paper towels.
Sheesh. All I wanted to do was to finish the hoses. By this time I was (no pun intended) deflated and set up a fan to try to dry the firewall shelf...