BlueDevil Products00203 Radiator Flush & Oil Degreaser - 1 Quart

I followed instructions but did a hybrid approach where the car idled for 20 min and then I drove it for 20 min. Let the car cool some and drained. Only 4 qt of the 6.6qt came out and it was pretty dirty. After the clear plastic water container sat over night you could all the blackish sediment at the bottom. I filled with distilled water , idled the car until thermostat opened and drained again. Repeated until the water appeared more clear. Took some time but I know the system is clean and the flush is fully out.

Worked. I've talked to some that just added it to the system with out thermostat removal or flush. I filled the directions as far as thermostat removal and flush. Worked well in both scenarios

Worked as stated

I followed the directions to a "T", it worked!

I have a Jeep TJ that the previous owner mixed the wrong radiator fluid. It looked like rusty mud. I throughly flushed the radiator with hose water to get as much sediment out. I let that all drain out and closed the petcock. I poured the radiator cleaner in first then added my water until the system was full. I then ran the vehicle for an hour around town. Let the vehicle cool and drained the fluid. It took me about 8-10 of these flushes to get the system clean. Don’t not leave this cleaner in for more than 4 hours. I also did my flush in the summer. Do not use water to flush the system in the winter months.I can’t say that the cleaner made a difference. However it didn’t hurt. It’s important to keep your cooling system clean. Like I said I had to do 8-10 flushes on my system but my cooling system was really bad. The vehicle runs very cool now and the heater works really well. I hope this helps.

Someone left this old diesel filled with water and it sat for years. I flushed it out first just to get the horrible stuff out first. I then filled and added the treatment and ran it a few time over 4hrs to circulate it. Drained and saved it in a 5 gallon container for disposal at the recycling center. Still had lots of rusty water so I repeated it again. 2nd time was the charm! Works good.

Great

I was skeptical but this stuff does work well. I have a 36 Street Rod with a Hemi. The radiator is small in comparison and there is no room for anything bigger than what's in there,20"H X 18"W and it was plugged up, not corroded or crusty but with brown sludge. I could see the waterways with my snake camera. Every other one was plugged. It took 4 flushes, 4 bottles, and now it is spotless and shiny aluminum inside. No more overheating. I highly recommend this.