BlueDevil Radiator Flush | Removes Rust, Scale & Grime | 32 oz. | 1 Pack

Great product and works great plus great price

This radiator flush worked exactly as intended and was simple to use. The instructions were clear, and the product mixed into the cooling system without any issues. After running it through and draining, the coolant passages were noticeably cleaner, and the old buildup was flushed out effectively. I noticed an improvement in cooling performance afterward, with the engine temperature running more consistently. It is a straightforward solution for routine maintenance or before replacing coolant. The bottle contains enough for a complete flush, and the price is reasonable compared to having a shop do the service. For anyone looking to maintain their cooling system and keep it running efficiently, this is a reliable and effective product.

Seemed to do a really

Work perfect for me

A+

I was skeptical, very skeptical, even after reading all the positive reviews. I have a 1977 F-250 that I have lovingly restored (in other words poured a ton of money and time into), it developed a leak somewhere and I was loosing coolant. It wasnt leaking onto the ground so I figured it must be going out the exhaust. I just didn't have the time to tear down the motor to find the problem. I purchased this product out of desperation and honestly thought I had waisted $65. In my mind this kind of problem just can't be fixed this easily. I spent two days doing this process, flushing the coolant system twice in an effort to make sure it was as clean as I could get it before putting in the BlueDevil. Well it's been a month and my coolant level hasn't dropped at all. The BlueDevil seems to have magically solved my coolant leak. I don't know where the leak was, all I know is that it's fixed. I am amazed. In a world where we are constantly bombarded with "Over promises and under results", the BlueDevil system works as advertised. So all you old guys (like me) this is one of the few things that actually works. Best money I've spent in a long time!

Wow! This stuff works much better than I expected! I just purchased an '85 Cadillac Seville as a restoration project. I decided to flush out the radiator after I drained the system in order to replace all the radiator hoses, heater hose, thermostat, etc... I figured that it couldn't hurt even though the antifreeze that I drained looked bright green and clean. I filled the system with the bottle of Blue Devil and water from the garden hose. I left it in the system for about a week and drove the car about 150 miles (in the summer with no chance of temps dropping anywhere near freezing). I drained the radiator and was shocked that the water that came out was dark brown and there was brown sludge in the overflow tank! I also ran the heater on high during that week to make sure the coolant was flowing through the heater core. At first, I couldn't even tell if the heater worked. By the end of the week, it was blowing fire! I drained and refilled with straight 100% water 3 more times and each time, the water drained was dirty until the 4th time when the overflow tank didn't have a layer of brown sludge on the bottom and the radiator drained out clear water again. I then refilled with Prestone antifreeze 50/50 mix and the GM tablets they recommend. I have much better piece of mind knowing that all that corrosion and sludge was cleaned out of the cooling system, probably saving me from overheating and costly repairs down the road! Blue Devil really cleaned out and opened up coolant passages in my motor! I'll be using it on all my cars now!

I suppose this cooling system cleaner is adequate IF you leave it in there for a few days of regular driving. Or maybe a week. The instructions do say that's one way to use it. On my truck I used the shorter method, and didn't seem to get much cleaning done -- the flush water wasn't very dirty. Next time I'll absolutely leave it in for longer.

Seems to.have done the job