Use ThoroFlush to thoroughly clean the cooling system removing rust, corrosion, and other debris along with "neutralizing" any left behind coolant solution or oil based products. This is the industries most powerful flush product. It can even be used in a removed fuel tank to prepare it for a welding repair. Neutralizing the residual fuel making it much safer for the patching process. Next, use Ceramic Motor Seal to fully coat the inside of the cooling system with a thin layer of ceramic. It will seal porous or blemished areas of the casting metal as well as any potential (weak) areas like where parts or surfaces mate with each other. Places like head gasket locations, head bolt studs, cylinder sleeve areas and others will all be sealed.And Finally, use All Weather Seal. While All Weather Seal can often be used alone to successfully seal existing leaks. It's ability to emulsify with any kind of engine coolant mixture and stay that way circulating in the system, makes it a great preventative for any potential future leaks as well as sealing existing leaks.