Cleaning the radiator

Hello again, probably 1.5 years ago, before the fall I began to check that the stove was on its own auto. Enabled - does not work i.e. heat does not go into the car. Yeah, I checked the antifreeze, there’s almost no in the expansion tank, maybe the radiator of the heater took air. Refilled, began to drive a car, does not go warm in any way, the thermostat works. He took off the hoses from the stove almost no antifreeze. It's time to clean the stove.
Even earlier, I bought a heater motor from a gazelle, (it was necessary). I bought hoses, but everything else was found in the garage. Yes, I’ll say right away that tile and gas for heating are necessary. Well, citric acid 3 packs of 20 g. (universal remedy for blockages in the kitchen or in the bathroom, put one bag in the sink and boiling water and buzzing) and of course free time 3 hours (this is with the whole assembly is not a tricky scheme). Yes, and a plastic bottle with a net at the exit (there was a lot of dirt and scale)
In general, the process is simple. We connect everything as in the photo, a bucket of water, and onto the tile, begins to boil, add acid, start the engine, well, we smoke for about 20 minutes. Then we change the water, all the same but without acid and with hot water. If the bucket is very dirty. Repeat with acid and rinse immediately with hot.
It helped me