How to exhaust Jetta water tank
Exhaust method of Jetta water tank: open the cover, add antifreeze, start the vehicle, loosen the exhaust screw to eliminate air tightness. The pot cover is like a pressure relief valve for the pot cover of a pressure cooker. When the water temperature rises, the volume of antifreeze expands (liquid expands with heat and contracts with cold), and excess gas will be discharged.
First, we ignite the vehicle and preheat it for 5- 10 minutes. When the cooling fan is turned on, the coolant will drop a little. Fill it with coolant and cover the water tank. But this method can only cure the symptoms, not the root cause. If you want to completely eradicate the air in the water tank, you must do the correct operation when changing the coolant next time. The following steps are as follows: 1 Open the engine compartment in a cold state and check whether the coolant is available. There are maximum and minimum scales on the edge of the cooling kettle. When the liquid level is lower than the lower limit when the vehicle is cold, it should be added. The addition amount is subject to the scale on the side of the pot. 2. Check the connecting pipes for cracks and leaks, focusing on the five-way pipe (named after the five interfaces connecting various parts); 3. Drain the old antifreeze, clean the liquid passage with clean water, so that the clean water can continuously flow through the engine cooling system, then idle for 3 to 5 minutes, let the water circulate, and continue to inject clean water until the flowing water is clean; 4. In order to make antifreeze flow into the water tank quickly, add new antifreeze from the water pipe of the water tank (radiator) for about one hour, then add a bucket of antifreeze to the antifreeze tank until the antifreeze tank is almost full, and ignite for about 10 minute. At this time, because a part of air is excluded, the liquid level of the cooling system has dropped, and antifreeze is added, and the capacity is between two scales.
How to disassemble Jetta's heater water tank?
Remove the steering wheel first, then the instrument panel, and then the warm water tank. To remove the warm water tank, the central control instrument panel must be removed. Drain the coolant first, and then remove the engine room warm water pipe, central console, the whole heater box assembly and heater box.
The disassembly method of Jetta heater box is as follows: (1) Drain the coolant in the cooling system. (2) Remove the control panel. (3) Remove the cable fixing piece on the left side of the heater and remove the screw on the terminal. (4) Move the wire connector behind the blower motor. (5) Remove the vacuum tube and lamp wire behind the heater control device. (6) Place a container under the engine and under the water supply pipe of the heater behind the cylinder head. (7) Remove the heater water supply pipe behind the cylinder head. Principle of warm water tank: In addition to a radiator in the engine compartment, there is also a heat exchanger in the dashboard of the cab, and the antifreeze radiated from the engine flows in the middle. Turning on the warm air can improve the heat dissipation in the car, which is especially useful for some Jetta cars to run long distances. It uses the cooling water of the engine as the working medium and blows it into the car from the same air outlet under the action of the blower to achieve the purposes of heating, ventilation and defrosting. There are two main ways of air intake: one is indoor air circulation, and the other is outdoor fresh air entering the room for ventilation circulation. The blower is electrically driven and also affected by the engine speed. Even if the engine speed is very low, it can still perform the functions of heating and defrosting.
How to exhaust Jetta water tank @20 19