OK, I know y'all (you guys) think I'm touched by now. I admit I do a lot of things that probably don't need done. That is one of the advantages of being retired and a bit retarded. My heat gage on these East Texas 100 degree days has been running up a tad over the midway point on my gage when pulling my finish mower which is my biggest user. I have flushed my system with over the counter flushes but never been happy with the results. I started goggling different home remedies and after quite a bit of reading I determined I was going to try a muriatic acid cleaning. Muriatic acid can be bought at Lowe's for around $8 a gallon. Normal use is for cleaning or etching cement. There muriatic acid is a 20% solution and is actually hydrochloric acid. It is stout stuff and actually reacts with water and causes heating. I removed my radiator, made wooden plugs to mostly plug the inlet and outlet. Cut 3 short pieces of 1/4" hose, plugged one end with a piece of dowel rod, put the other end on the overflow, drain, and small bypass outlets on the radiator. I stood my radiator up. I mixed 2/3 gallon of water and 1/3 gallon of muriatic acid and poured this mixture into the radiator. I let this stay for appx 10 minutes. I then drained and flushed and flushed and flushed. I then mixed up a good dose of baking soda and filled a gallon jug. I poured this into the radiator and let set for 10 minutes or so and again flushed over and over again.
I know this is getting long. During the flush process I did get out a bunch of crud. The jury is still out on my success or failure. I have reinstalled, hooked up my finish mower and let it run in the garage at 540 RPM. Reason I state that is because these high lift blades require a good deal of horsepower even without cutting grass. My thermostat opens at the first mark on my gage, the gage never went any higher than that. I know the test won't be complete until I have tested it on a hot day with a load. Whenever that happens I will be back with an honest report.
I will conclude by saying muriatic acid can be dangerous and I am not recommending this process to the world. Please don't ask what I did with the used acid mix. I disposed of it properly. Might add, the solution can be neutralized with several different products. My radiator may start leaking! Sure hope not.
I know this is getting long. During the flush process I did get out a bunch of crud. The jury is still out on my success or failure. I have reinstalled, hooked up my finish mower and let it run in the garage at 540 RPM. Reason I state that is because these high lift blades require a good deal of horsepower even without cutting grass. My thermostat opens at the first mark on my gage, the gage never went any higher than that. I know the test won't be complete until I have tested it on a hot day with a load. Whenever that happens I will be back with an honest report.
I will conclude by saying muriatic acid can be dangerous and I am not recommending this process to the world. Please don't ask what I did with the used acid mix. I disposed of it properly. Might add, the solution can be neutralized with several different products. My radiator may start leaking! Sure hope not.