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 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.

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?