Fresh Prestone Dexcool premix is kinda red or pink.
The small diameter hose on that sheet metal octopus between the thermostat housing and the water pump might actually be a reasonable place to hook up the flush gear to the cooling system.
Don't let your body stop you from doing things you like to do.
I'm getting sore more than I used to on cold days and I need to pull myself up when I get down on the ground to work on stuff but I'll be darned if I'll stop just cause it hurts. I like working on the machinery so I'll keep doing it. I move slower than I used to cause it hurts but I ain't gonna stop.
I dug 18 one foot deep holes along the property line early in the week and I'll be digging up some beech, maple, and oak saplings in the woods, mostly rock maple if I marked em right last fall, to put in those holes with chicken doodie, dirt, and peat next week after the freeze goes back to spring. I'm moving some volunteer antique lilacs and forsythia too. They'll be my mark on this place a century after I'm dust.
I've had arthritis in my hands and other joints since I was a young teen. If my shoulders, hands, hips, and knees hurt in the morning I know I'm still alive.