flushing out a coolant system.

Chuck, I have had issues with my 38B over heating after mowing for an hour or so. Last summer I bought a jug of NAPA radiator flush. I added it to the water, ran the engine up to working temp a couple times and then drained it. A lot of nasty looking stuff came out but I wasn't sure it was clean, so I added some washing soda and ran it up to temp again. It wouldn't warm up good because I just had it idling in the shed so I put a canvas over the rad and finally got it warmed up. My next step, hopefully tomorrow will be to put a gallon of vinegar in her and run till warmed good. Then I hope I won't be wasting antifreeze by filling it up for next summers mowing chores.
 I would hate to have to clean it up like I did the WC. I had it completely tore down and cleaned everything but the rad in my electrolysis tank.

I think I got the radiator pretty good, but I have a feeling that the block is probably just as gummed up if not worse.   I think I will end up pulling it outside and flushing water through the hoses from the bottom and the top until it comes out clear.

I use a product called Nalcool. Its purple in color, and you add it to the cooling system. It cleans as you use the vehicle (in this case Tractor) and you can leave it in for a few days while you use the Tractor. It'll clean while your working the Tractor. After a few days, drain and flush the system, and add your 50/50 mix of Antifreeze and water. This stuff does a great job cleaning the inside of the radiator, as well as the rest of the engine block. Its not that caustic, so its easier on you as well as the environment. Napa sells it under their brand name, but its still the same stuff. Purple in color. You also can add a little to the cooling system after its flushed with your new Antifreeze as it will clean while you drive...
Steve@B&B

I went to bed one night on top of Mt. Eagle in Tn. In the morning I looked out the front window and saw a huge puddle of antifreeze. The oil cooler had let go and oil was pumped into the cooling system. Temp was normal but I only had about 5 lbs. of oil pressure. I bought oil and filled it up and limped into Chattanooga to a Mack dealer.  9 hours of cold garden hose running in the radiator,at $50/hr, one new cooler,full of straight water and ONLY 942 dollars later I was back on the road. (would that classify as a rip-off?) Called my buddy at Peterbilt in Indy about what to do and he said to buy liquid Calgon dishwasher liquid and pour the whole jug in the radiator, run my trip and when I got home to drain and flush it. Also he told me to do this for a week running the truck and clean it out every weekend until it was clean. It took 3-4 weeks to get it clean, and then I filled it with distilled water and antifreeze. It was amazing how clean it got the system. I traded that truck later for a newer one and I think it is still hauling off the farm in western Ohio.

The hose connection kits plumb into heater hoses. Might not be an option on the D19. The kits from NAPA are about $1.79.

Gerald J.

As of last year, dishwashing and laundry detergents have no phosphates and are poor at cleaning, even causing aluminum to turn black.

Gerald J.

washing soda works like the old Calgon and Cascade used to

I can get it in my little grocery and I think in super wallyworlds, dont know bout little ones.

Your water softener makes it substituting sodium for calcium. Its sodium carbonate. Why water from a softener will wash without added soap or detergent if the water was really hard.

Gerald J.