Drained coolant must be collected and disposed of.
Attention! When opening the expansion tank cap on a hot engine, care must be taken, as escaping vapors can cause severe burns. To do this, close the expansion tank cap with a thick layer of cloth and slowly unscrew it until a hissing sound is heard. After the hiss stops, slowly unscrew and remove the cap from the expansion tank.
The coolant must be drained on a cold engine.
Remove the expansion tank cap.
Pic. 4.62. Location of cooling system elements: 1 - inlet pipe; 2 - pin connector; 3 - bolt; 4, 5 - hose clamps for cooling system hoses
Loosen clamps 4 and 5 (pic. 4.62) fixing the cooling system hoses.
Remove bolt 3.
Disconnect connector 2.
Remove an inlet branch pipe 1 of system of cooling.
Install a coolant collection pan under the engine.
Pic. 4.63. Location of plugs (A and B) to remove air from the cooling system
Remove plugs A and B (pic. 4.63) to remove air from the cooling system.
Pic. 4.64. Location of plugs (C and D) to remove air from the cooling system on vehicles with a particulate filter
On vehicles with a particulate filter, remove plugs C and D (pic. 4.64) to remove air from the cooling system.
Pic. 3.46. Location of the bottom pipe (1) radiator
Loosen the clamp, remove the hose from the lower radiator pipe 1 (see fig. 3.46), drain the coolant from the radiator and hose.
Pic. 4.65. Plug location (1) coolant drain on the cylinder block
Remove screw plug 1 (pic. 4.65) and drain the coolant from the cylinder block. After draining the coolant, screw the plug back in place and connect the lower radiator hose.
If the coolant is heavily contaminated, flush the cooling system. Since the coolant cannot be completely drained from the cooling system, it is recommended to flush the cooling system each time the coolant is drained.
Pic. 3.47. Mounting on a special expansion tank 0173/2 (1) for filling coolant
Instead of the cap of the expansion tank, screw in a special container 1 (pic. 3.47) 0173/2 for filling coolant. This is necessary in order to completely fill the engine cooling system with coolant and remove air from it. In the absence of a special container, you can make it yourself.
Slowly pour BASF GLYSANTIN G33-23F or GUTIT ESSEX REVKOGEL 2000 coolant into the cooling system.
Pour coolant into the expansion tank until it flows out through the hole for the bleed plugs. Screw on caps A and B (see fig. 4.63), C and D (see fig. 4.64).
For proper bleeding of the cooling system, a special container 1 (pic. 3.47) 0173/2 to fill the coolant must be filled up to the 1 liter mark.
Start the engine and let it run at a crankshaft speed of 1500-2000 min-1 until the end of the second cooling cycle (turning on/off the radiator fan). At the same time, maintain the liquid level at around 1 liter.
Note. If the cooling system was filled with coolant that is not recommended by the manufacturer, drain it from the cooling system. Pour clean water into the cooling system, start the engine and let it idle for 2 minutes. Drain the water from the cooling system and blow out the engine cooling system with compressed air through the expansion tank. Fill with fresh coolant recommended by the manufacturer.
Stop the engine.
Remove special container 1 (see fig. 3.47) 0173/2 to fill the coolant and screw on the expansion tank cap.
Check the coolant level and top up if necessary.
On a hot engine, the coolant level should be at the level of the max mark, on a cold engine - between the marks «Max» And «Min».