To find the true cause of the leak, you need to know some of the features of Tosol. For example, a leak is easier to detect on a cold engine, apparently, cooled Tosol has better penetrating ability.
There are often cases when no thorough searches and observations reveal the leak location, but the Tosol still decreases. In this case, you cannot do without special measures. Check how tight the cooling system is under pressure. It is convenient to use a foot pump for pumping tires, as it is equipped with a pressure gauge. Having made a simple adapter (Fig. 50), insert it into the radiator pipe instead of the temporarily removed plastic hose going to the expansion tank, and, having connected the pump hose, bring the pressure in the system to 0.1 MN. If there is a leak through leaks in the connections, it will immediately give itself away.
Sometimes the radiator is "to blame" for excessive coolant consumption. If you discover a defect while on the road, it makes sense to try to fix it (temporarily to the nearest station) small measures, i.e. seal the fire with plasticine, if you happen to have it lying around, or with soap.
Having reached a workshop that can repair the radiator, drain the remaining coolant into a clean container, having first unscrewed the drain cocks (plugs) in the lower tank of the radiator and on the cylinder block and removed the covers (plugs) of the radiator and expansion tank. The location of the plug in the lower tank is weak, therefore when unscrewing the plug with one key, use a second 17 mm key to support the plug so as not to tear it out of the tank body.
To remove the radiator, loosen the clamp on the radiator inlet hose and remove the hose from the inlet pipe. Do the same with the clamp on the outlet hose and remove the hose from the outlet pipe. Loosen the clamp on the expansion tank tube and remove the tube from the radiator filler neck pipe. Disconnect the upper and lower halves of the fan shroud and remove them from the radiator. Unscrew the nuts securing the radiator to the body and carefully remove the radiator from the engine compartment.
On cars with an electric fan, before removing the radiator, it is necessary to dismantle the electric fan. Installing the radiator in its place is performed in the reverse order.
It is rare that coolant (it has excellent penetrating ability - better than water) finds a loophole through the water pump seal. To almost certainly clarify the condition of the water pump bearings (and, consequently, a breach of the sealing of the gland), it is necessary to check for play. This operation is performed by trying to move the fan or crankshaft pulley away from you and towards you. Noticeable play is a sign of bearing wear and the need to measure the seal. Having discovered this, it makes sense to contact a service station, since special pullers are needed to disassemble the pump. However, the operation can be performed on your own, using the idea of a car enthusiast from Ochemchire. Sleeve 5 (Fig. 51) and adjusting bolt 6, under normal conditions, serve as a support for the lever in the valve drive. Ball 4 with a diameter of 12 mm is placed in the impeller of the water pump, then sleeve 5 is screwed in until it stops, and then bolt 6 is tightened. Impeller 3 easily comes off shaft 2, located in block 1.
It can be very unpleasant when no traces of leaking fluid are found, but it still disappears. Most likely, it has found its way into the engine crankcase. And if this is really the case, then the oil level (now diluted with Tosol) should increase. Such a defect should be dealt with by specialists at a service station.