You will need
  • Dry mustard powder, polymer sealant, special soldering iron, solder, a "cold welding", a set of hoses and clamps, radiator and, if necessary, other parts of the cooling system for replacement.
Determine the exact location of the leak antifreeze. If the fluid flows in the area of the hose connections and the radiator, tighten clamps.
If cracks have appeared on the different elements of the system cooling and need to go, and the service is for a temporary seal, use the old recipe. Dissolve some powder dry mustard in the antifreeze and pour the mixture into the expansion tank or the radiator. Mustard will reduce or even completely close up a small leak. After the trip, thoroughly flush the system coolingto mustard had not closed the gaps of the tubes of the radiator and the stove.
Use instead of mustard modern polymer sealants. Don't forget: they are designed for quick repair and not for prevention. Because sometimes those narrow passages that you do not want to block, form a coating on internal surfaces of the system cooling. Pour in the polymerizing medium in the radiator or in the coolant reservior tank. Warm up the engine. After some time, the heated sealant is exposed to air will create an airtight polymer film in the area of the leak if the hole size is not more than 1.5-2 square mm. It is small cracks, holes, delamination welded parts, joints, gaskets, pipes, seals.
In the case of large defects, repair parts system cooling. Drain the coolant and remove the damaged parts. In a copper radiator sealed the hole with a special soldering iron with high heat capacity to power enough to melt the solder and heat the surface. For aluminum radiator use the "cold welding" heat resistant sealants adhesives, similar to the structure of the clay. Apply glue to the crack. Let it harden and set before using the radiator. Do everything carefully, observing technology to the radiator kept the working pressure.
At the first opportunity replace the leaking part with a new one. Change cracked hoses, put a quality hose clamp on loose connections, install a new radiator and, if necessary, all the other elements: pump of system of cooling, heater tap etc.