BlueDevil Products BlueDevil 00203 Radiator Flush & Oil Degreaser - 32 Ounce,Gray

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After using this product car got worse and had to get a radiator flush first from mechanic then it still needed a new rad for car $1800 later. Took weeks to get repaired. I wouldn't buy this and suggest going to straight to the mechanic before using this product.

Thought I was looking at a new radiator as it was running hot. Knew I had a blockage based on research and looked at solutions. Found this product and it solved the issue. I highly recommend this product and you have an older vehicle. No question this is a quality product!

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.

Be aware, they advertise the stop leak stuff on the bottle because using it could start leaks in your cooling system. however if using this causes a leak, then it showed you where your metal was getting thin, its better to have it start leaking in your driveway then a few months from now out on a highway. it cleans out the rust, sometimes the rust is keeping it from leaking, if you see rust coming out in the water, that was once your engine, so try not to get it too clean. if you know what i mean?