When Zhang Ying saw these parts on the motorcycle, she was even more confused than seeing geometric math problems.

Especially when Jiang Jiuling disassembled the position of the front of the car and checked the front line interface, her head became even more dizzy.

When Jiang Jiuling began to disassemble the engine shell and put the parts neatly one by one in the newspaper, Zhang Ying didn't even dare to ask a few more words, for fear of disturbing Jiang Jiuling.

The engine was completely dismantled by Jiang Jiuling, and the oil inside was viscous black, which was obviously long beyond the replacement time.

Jiang Jiuling, who was wearing labor protection gloves, took a bottle of motorcycle engine oil with notes.

I checked the air filter and added the air filter as well.

When Jiang Jiuling released the gasoline in the freshly filled tank, Zhang Ying finally couldn't help but ask, "Do you have to change this gasoline, we only filled it up yesterday......"

"Gasoline I use. Jiang Jiuling used a plastic basin to take a small half basin of gasoline, poured in some hand sanitizer bought from a hardware store, and then threw the engine parts that were already black on the surface.

Seeing that Zhang Yingzhu had nothing to do there, Jiang Jiuling threw her a pair of gloves and asked her to gently scrub the dirt on the surface of the parts with a brush.

"Why don't you wash it with water, it's a waste of gasoline. Zhang Ying asked with some distress after looking at the clear gasoline in the basin and turning it blacker than ink in a moment.

"Sister Zhang...... If you don't speak, I won't treat you for dumb. Jiang Jiuling was holding a spark plug and observing it carefully under the light.

"What are you looking at?"

"Spark plugs. ”

"Spark plug...... What is it?" Zhang Ying felt that he had become the original Rosso pig in the yard, stupid and didn't know anything.

But she couldn't restrain her curiosity.

Zhang Ying sat on the small bench, brushing the parts with a brush, and kept looking at Jiang Jiuling with his spare eyes. The latter held up a small part that she couldn't read, and thought in the light.

Under the light, Jiang Jiuling pursed his lips and thought, which made Zhang Ying can't help but look at it a few more times. She felt that Jiang Jiuling was serious, and it seemed to be quite good-looking.

A spark plug that ignites normally is not necessarily a good spark plug.

The spark plug in front of me was already a third black, and the carbon deposits had spread to the ceramic shell.

This indicates that the engine has a very heavy inadequate combustion, close to the light, you can also see that there is a layer of powder on the surface of the carbon deposit, wipe it with your hands, all these powders are attached to your hands, and it seems to be sticky.

This shows that the engine still burns oil when it is working, and under normal circumstances, the ignition point of the spark plug should be yellow-brown after working for a period of time, similar to rust.

The spark plug was also added to the list of parts that needed to be replaced, Jiang Jiuling found a blank notebook and began to draw and number the most important cylinder parts of the engine.

It's a 45 hp, four-cylinder, 16-valve motorcycle engine that's far more complex than a normal motorcycle engine.

Jiang Jiuling has only dismantled the car engine, so before disassembling the cylinder, it is necessary to draw and number the above parts first, so as not to forget the installation steps in the end.

For college graduates of the Department of Mechanical Engineering, mechanical drawing is a basic skill, and if they can't, they don't have ears in class.

Because he only numbered the drawing of the parts, Jiang Jiuling only used a ruler and a compass, and there was a basic shape, and there was no need to consider the various parameters of the drawing.

When drawing the first figure with a pencil, Zhang Ying on the side looked at Jiang Jiuling's eyes as if he was looking at a rare metal head.

This guy can't fight except for it, he seems to be able to do anything!

......

Following.

Jiang Jiuling brought the model excavator to the school's science and technology building, and found some materials from the warehouse for the students to do experiments in chemistry class.

There are weak bases and emulsifiers, as well as alcohol of high purity.

Jiang Jiuling was going to get some simple detergent to wash off the carbon and sludge inside the engine.

Before crossing, Jiang Jiuling liked to do the maintenance of the car by himself, and it was not strange to deal with carbon deposits. However, at that time, it was all used as a finished engine cleaner, and now there is no such thing, so you can only do it yourself.

Strictly speaking, it is not technically difficult to deal with carbon deposits, as long as you are careful. Mix these things into gasoline, and then put the parts in to seal and soak for a period of time, the weak alkali and emulsifier will dissolve the stubborn carbon deposits and sludge on the parts.

Do not wipe with a brush to prevent dust particles from wearing up the cylinder.

It is a waste to put these chemical materials there and not use them, Jiang Jiuling and Teacher He said that when they took some back to wash the parts, he didn't even raise his head.

After school at noon, after Jiang Jiuling put those materials home, he rode his bicycle all the way to Go Alley.

I had been busy before, and I didn't have time to visit Concubine Zhao, but now I have time to come over and have a look.

Jiang Jiuling didn't buy the tape, but brought a few catties of fruit. When she knocked on the door, it was Aunt Xu who opened the door, and when she saw that it was Jiang Jiuling, she politely welcomed Jiang Jiuling in.

Although Zhao Xi, the head of the family, was not at home, he had explained that if Jiang Jiuling came over, he would welcome him in, and he would leave as long as he wanted.

"Auntie, where's Concubine Zhao?"

"Still upstairs, I always persuaded her to let her come down and bask in the sun, but she just wouldn't listen. Aunt Xu was a little helpless and said, "Look at her face is as white as a porcelain bowl." ”

"The little girl's family just can't wipe off her face. ”

"Look at those old men and women on the street, so many of them can't even tell the difference between dark and dawn, and people are not what to do. ”

"If you have a chance, you have to persuade her more. ”

Jiang Jiuling naturally agreed.

Carrying the fruit to the second floor, Jiang Jiuling originally thought that Concubine Zhao was listening to songs in the room. I didn't expect that as soon as I walked out of the stairs, I saw a thin figure curled up on the sofa in the living room.

Concubine Zhao is "watching" TV.

Perhaps inappropriate, she sat on the sofa with a blanket in her arms, her head tilted sideways listening to the sound on the TV.

The sound of the TV was very small, and Jiang Jiuling's footsteps were also very light, but Concubine Zhao still heard that the footsteps did not belong to Aunt Xu.

Concubine Zhao turned her head a little nervously, "Who...... Who?"

"It's me. ”

Of course, Concubine Zhao could hear that this was Jiang Jiuling's voice, her nervousness relaxed, and she said with some reluctance: "You go, you are not welcome here." ”

There is more than one layer of rejection between "not welcome" and "never come" last time.

"Okay, I'll be gone in a moment. Jiang Jiuling was not in a hurry to ease the relationship between the two, he stood on the edge of the living room and said gently: "I brought some bananas and oranges, if you don't like it, you can leave them for Aunt Xu to eat." ”

Concubine Zhao turned her head, hugged the blanket in her arms, and did not speak.

For some reason, she can't say the phrase "you should never come" now.

Concubine Zhao wanted to escape from reality, but she could escape from reality, but she couldn't escape from the people close to her.

For her father, of course, Concubine Zhao didn't think about escaping. Her father invited Aunt Xu to take care of her, and after resisting for a while, Concubine Zhao also acquiesced. After all, her father needs to work and can't be by her side all the time.

She asked Jiang Jiuling never to come before, on the one hand, she didn't want her former friends to see what she was like now.

On the other hand, of course, he was angry that in the two months that he was hospitalized, he and Sun Xiaohu never showed up once, and they didn't know where to hide like a quail.

The hurtful words have already been said, Jiang Jiuling has come to see her again and again, and Concubine Zhao can't bear to say hurtful words again.

I didn't want Jiang Jiuling to see what he was like now, but this guy had already come a few times, and Concubine Zhao was also numb.

Come on, come on, ignore him.

It's just that why do you bring fruit and nice tapes?