Lao cheng Jing nuan feng conduit installing

Would you be worried if you found a small pool of unknown liquid after driving out of the parking space? I believe that many riders will be worried and suspect that there are security risks in the car. After all, this is not normal. Isn't this the public? This problem happened in Tiguan.

After the owner of Tiguan found this problem, he drove the car directly to the repair shop for the master to check. After inspection, the master said to the owner: the common fault of this engine! Small pool liquid is the coolant of the engine, and the water pumps of this engine basically leak coolant.

How should this be repaired? Let's take a look at the case introduction of this article. As shown in the figure below, the mileage indicated by the instrument is 150000 km. This Volkswagen Tiguan was produced on 20 1 1. It has been 9 years now, and it is normal for the water pump to leak coolant.

After checking the problem of the water pump, the master conducted a comprehensive inspection of the engine and found that the aging of the heating water pipe was particularly serious. It is recommended to replace the water pump and heating pipe. Considering that the coolant has not been changed for a long time, it is recommended that the owner also change the coolant, and the owner agrees.

Let's look at the picture below, Volkswagen's classic EA888 engine. This problem is also a common problem of this engine. Nine times out of ten, coolant will leak, and most maintenance masters know it. As shown by the green arrow, two new heating pipes have been replaced; As shown by the orange arrow, the water pump is located at the lower part of the intake pipe.

As shown in the figure below, 1 and 2 are the replacement of two old heater pipes. Coolant leaks at the interface. The small water pipe shown in Figure 3 was originally installed on the small bakelite pipe shown by the orange arrow, but the small bakelite pipe was broken.

As shown by the arrow in the figure below, this is a broken bakelite pipe, and the rest can be buckled by hand. The master said that its fracture is a common problem, mainly because it is too old? After all, it's been nine years.

Careful riders may notice that the two water pipes are covered with metal pipes, which mainly play the role of heat insulation. Because the lower part of the water pipe is exhaust pipe and turbocharging, the working temperature is particularly high, so it is necessary to protect the water pipes.

Water pump? Located at the lower part of the intake manifold, although the water pump can be removed without removing the intake manifold, it is particularly inconvenient to maintain, so the master decided to remove the intake manifold first. As shown by the arrow in the figure below, the intake manifold is being removed by the master, and the four protruding parts on the left are fuel nozzles.

After the intake manifold was removed, the water pump was easily removed by the master. As shown in the figure below, this is the position where the water pump is connected to the engine block, and the sealing ring shown by the arrow leaks coolant. ?

As shown by the orange arrow in the figure below, this is the position where the water pump and cylinder are combined in the figure above. The rubber sealing ring of water pump is seriously aging. The black impurity left on the cylinder block is the rubber of the sealing ring.

As shown by the arrow in the figure below, the master is polishing the installation position of the water pump with sandpaper, which must be very clean and smooth.

As shown in the figure below, this is the joint surface of the new water pump. You can feel the rubber sealing ring protruding from the contact surface with your hands. Check that there is no problem and you can install it directly.

As shown below, the new water pump has just been installed on the engine by the captain. The orange arrow indicates the connection position of the water pump and the oil radiator; As shown by the green arrow, this is the power source of the water pump, and a shaft in the engine is connected with the pulley of the water pump through a small belt.

Subsequently, the master installed the intake manifold and other parts. Before adding coolant, the cooling system must be pressurized to prevent leakage. After checking that the sealing of the cooling system is normal, vacuumize and add coolant, and start the engine to check again. Everything's fine.

This is a case in which the master repaired the leaked coolant of Volkswagen Tiguan EA888. It is a very common problem, and riders can simply understand it. When our car encounters abnormal conditions, it should be inspected by the master in time to eliminate potential safety hazards in time. For more car maintenance cases, welcome to pay attention to the "maintenance worker Xiao Wu" of WeChat official account.

This article comes from car home, the author of the car manufacturer, and does not represent car home's position.