Ford Genuine Ford Fluid VC-9 Engine Cooling System Iron Cleaner - 1 Quart

Very potent stuff, but did a GREAT JOB of cleaning the coolant system. Don't get it in your eyes or on your skin. Cooling System is spotless and good for another 100,000 miles.

This worked great, try it before you change your oil cooler on the powerstroke 6.0! I was starting to get the wrench light once in a while when my oil temps were around 230 degrees. After this flush, oil temps were less than 10 degrees difference from coolant temps. 2 month Update a bunch of rust pieces/sand appeared and I ended up having to back flush the oil cooler with air and water. I think this product loosened up all the rust, but it didn’t all come off during the original flush. I was starting to see 12 degrees deltas. So I back flushed and Temps are now back to normal, see second photo. This was after driving for about 30 miles around 65mph. I did see a delta of up to 8 degrees, but it does drop back down quickly.

If you own a diesel, you need to know what VC-9 is and what it does. Because diesel engines develope so much pressure inside, they have to be extremely strong, which is why they are made of cast iron. The problem with cast iron, it rusts really easy and can be severe. That is where VC-9 comes into play. When run through the cooling system as a flush, it breaks down the rust buildup and gets rid of it. So VC-9 is designed as a radiator flush that cleans the block, radiator and heater core. Allows your diesel engine to live a nice long life. My truck, a Ford F250 requires two quarts of vc9 to do the job of cleaning out a cast iron block.

I had to replace the heater core and coolant system in my 2006 ford taurus. I thought it would be best to also try and clean out of the system while I was at it. Just pour this in while flushing the system and your good to go! probably not necessary but with a older car, I figured it could not hurt.

Great price for product

This really work if you use correctly. Watch the YouTube video it a time consuming project to do but worth it.

If you need VC-9 and need it delivered. Here it is

From what I read, this is the best stuff to use to effectively flush the cooling system. The over the counter stuff is junk and does not clean well. There are two versions of this formula, this one was for a Diesel with an iron engine block. Make sure you order the correct one. Seller delivered as promised.