In June, the cold car start report the following picture fault light on, the hot car restart fault disappeared after a while, using 5053 testing and consulting imported Volkswagen maintenance master to judge as the electronic thermostat fault, check the coolant did not find leakage, estimated to be caused by coolant infiltration into the actuator N49315, so it took 2 months. Get the spare parts and materials ready, and have time to change the electronic water pump yourself on the weekend, and the oil change cycle is almost enough to change the oil together.
The cold car started the fault light on, and the hot car disappeared after a while, so it took 2 months.
The EPC failure light is also on.
Select the improved 06K121600D electronic water pump assembly, pay attention to assemble the electronic thermostat and pump screw T30 must be tightened with torque wrench 9Nm, otherwise it will cause leakage due to uneven force, and it is not easy to disassemble and assemble once.
Electronic water pump assembly pump belt.
The connecting short pipe is made of aluminum alloy and equipped with high temperature resistant and anti-aging silicone O-ring.
It is learned on the altar that the O-ring on the engine will leak after a long time, and the preventive maintenance of the two-way tube made of aluminum alloy has also been replaced.
Aluminum alloy two-way pipe with high-temperature-resistant, anti-aging fluororubber O-ring should be able to last longer.
This time, the replacement-free anhydrous coolant is also used, which is much more expensive than ordinary coolant. I hope it is really good to be publicized.
To start work, lift the front wheel of the car with a security bracket, remove the engine guard plate, screw T25, T40.
Disassemble the air intake kit, screw T2504and the filter element shell is fixed with only one 5H inner hexagon screw, loosen the force and lift the whole shell directly out, and the inlet must be well protected.
The intake kit is removed and cleaned carefully, and the NK filter element is also cleaned and maintained by the way.
Remove the intake pipe connected to the throttle, screw T30002.
Remove the throttle and clean it.
There are still some carbon deposits on the back, which is not easy to clean at one time.
I am removing the red arrow and putting down the joint on this pipe to clean the coolant as much as possible.
Remove the red arrow to the turbocharger hard pipe screw T30room2 and remove it, then there will be room to replace the two-way pipe of the green arrow and leave room for removing the electronic water pump assembly, otherwise the electronic fan will always have room.
Remove the two-way pipe.
Install new aluminum alloy two-way tube.
Unplug the three plugs in the position indicated by the red arrow and remove the plug retaining bracket screw T30Three pipe connections to the electronic water pump indicated by the blue arrow; remove the electronic water pump assembly screw T300.05 indicated by the green arrow, according to the method of body disassembly and assembly there are many posts and videos on the Internet, which will not be detailed here.
After changing the electronic water pump reverse sequence back to the pipe fittings, plugs, air intake kit, will disassemble should be installed this is not detailed, to say that the screws are T30, I am torque wrench 9Nm tightening, to avoid accidentally vigorously screw trouble, this is also the main reason for me to do it myself. When the ash is finished and filled with coolant, I borrowed a Yuanzheng X431 PRO3S automobile fault detector to match the throttle and the electronic water pump (note: the electronic water pump must not be matched first), there are also many tutorials online, after matching the exhaust for 30 minutes, the replacement of the electronic water pump is completed.
The following is the change of oil material:
Add a bottle of engine internal cleaning agent before landing, and use the car cooling system to clean the exhaust engine.
This time the engine oil uses this fully synthetic oil 5W-40, with an oil injection capacity of 5.5L.
Oil filter
Added a bottle of antiwear protective agent.
As you have replaced the aluminum alloy oil pan by yourself, it is not too easy to change the oil. Use 5053 maintenance to reset, and change the maintenance mileage to 10000 km, the maintenance interval to 360d, the original car is 7500 km, 180d, this car is already driving less, 180 days later always remind maintenance bored to death, because it is the first time to change the electronic water pump for a whole day, tired? But it still has a sense of achievement, ha.
BblytheMalory 
5 
September 4, 2024 
