Post by acvw74 on Aug 29, 2017 20:46:06 GMT -5
It took a while to get to this point...seems I had other demons to deal with before tackling the coolant...tire, brakes, poor performance and overheating...to name most...but now that they seem to be resolved!
The cooling system on the JSD250 with the 172MM engine holds about 1.1 liters of coolant. So I ordered a half gallon of Evans Powersport waterless coolant and a half gallon of Evans Prep Fluid.
Make sure your cooling system is working properly before beginning this process, any repairs, cleaning or flushing should be done first.
I followed the directions from the manufacture instructions.
1. Drain the existing coolant.
a. Use a high volume air source to help evacuate remaining coolant. They do not recommend using compressed air - I was lucky my Shop Vac has a connection to plug the hose into the exhaust - Bingo...high volume air! Also makes an interesting way to clean the garage.
b. Don't forget to empty the overflow tank - typically coolant doesn't circulate through the overflow.
2. Refill the system with Prep Fluid - This is the first step in eliminating water from your system. Remember most coolant is 50/50 water and antifreeze. The goal is to get the system less that 3% water.
a. After filling with Prep, start the engine and bring it up to operating temp - The goal is to get the thermostat to open and circulate the coolant. At this point it is a numbers game - "The solution is dilution" - Going from a 50% water solution to near zero.
b. Giving the engine plenty of time to cool - Drain the system (Again) - Don't be surprised if the Prep Fluid comes out looking like the old antifreeze.
c. Use the high volume air to blow the system out...again try to get as much out as possible - I leaned the bike over in different positions to help the process - NOTE: cover the area over the drain when you use the high volume air....it will make a mess...I used an old shop towel to catch the spray/mist.
3. Technically...by the math...the system should if refilled should work out to less than 3%...but I had almost enough Prep Fluid to refill the system... So I did it again....same process - Filled with Prep, ran up to operating temperature and drained.
The fluid still wasn't clear - but I attribute some of this to the UV leak indicator I had put in prior to this project.
4. Finally refill with the waterless coolant.
Run the engine and top off the system - and don't forget to refill the overflow tank.
By the numbers the system is about 1/2% or less water.
I ran the system up to operating temperature and removed the radiator cap - (FYI very tense moment) and nothing....other than being hot...it was just as if the system was cool.