Rebirth of the Auto Giant

Chapter 67 Engine Vibration

"Oh, thank you so much, Wang." Claire had no doubts about Wang Shi's opinion and directly asked her subordinates to apply to the head office to ship the engine oil.

"Wang, how much is your repair fee?" Claire said.

Although Wang Shi came here to take a look, in the eyes of Lao Mei, the labor repair fee must be paid, and in their eyes, they didn't say anything about helping. They made a clear distinction.

"Five hundred, it's the last time you helped me. I only charge US dollars." Wang Shi said.

Soon, Claire returned to the office building and gave Wang Shi five hundred dollars, and sent Wang Shi's master and apprentice back.

In the car, Wang Shi thought about engine oil.

Currently, my shop does not store engine oil. What if a customer needs it during repairs?

You can’t say that as a repair shop, you don’t even have engine oil, right?

API (American Petroleum Institute) conducts tests on Asian cars and American cars. These two types of cars account for a large proportion in China now. Of course, you can use them when you encounter European cars. Today's car owners are not so particular.

Thinking of this, Wang Shi asked: "Claire, you know, my repair shop also needs some engine oil. Can you help me get some Mobil engine oil?"

"Of course. In our country, as long as you have money, there is nothing you can't do. You are my friend. You tell me how much you want, and I will help you get it next time. But if you can't get through the customs, then let's see.

It's up to you." Claire acted very cheerfully.

How much is appropriate?

"Okay, you can come over next time when the goods arrive, and I will figure out the rest myself." There are not that many customers yet, the number of cars in the country is not that many, and there are not that many cars in Beijing. Finally, Wang Shi asked

Claire obtained three brands of motor oil: Mobil, Shell and Blue Mountain, totaling about five boxes.

"Okay, just come here and I'll pick it up myself. Thank you very much."

"You're welcome. Don't you Chinese always help your friends? I'm learning from you, and you've helped me a lot."

"Claire, you learn very quickly. You are almost a master of China." Wang Shi said.

Wang Shi didn't believe that he was really doing it for friendship. In their minds, it wouldn't work if they didn't have money to build a road. They regarded labor costs as high as the sky.

He will also get some profit from this, but Wang Shi doesn't care, he will also make money back from the car owner.

I ordered engine oil from Claire in the car and returned to the store.

This is considered an opening.

The weather was getting colder and colder, so the two of them stayed in the store.

On the third day, one of them came to the door by himself.

The boss is in his fifties and looks like he is an overseas Chinese who has returned from China. He does not dress like he does back home.

Wearing sunglasses, carrying a black leather bag, and a gray long-lapel suit, he got out of the car.

"Oh, I finally found a repair shop." The car owner, who had a shaved head, looked up at the shop's sign and breathed a sigh of relief.

"Hello, boss." It's rare for Wang Shi to encounter a business. Besides, the Mercedes-Benz in front of him is also a classic luxury model. The silver trim makes it more fashionable.

"Help me take a look. I've been stalling a lot lately and I feel weak and shake a lot. Sometimes it's the same on the road. It's delayed my trip several times. Can you fix it?" The boss looked at his car and pinched it.

The black leather bag under the armpit said.

"Let me take a look first, and I will try my best to help you fix it. Of course, if you need to replace the parts, I don't have any at the moment." After Wang Shi said that, his apprentice Lin Zhengtang also walked out and invited the other party in.

The other party looked back and saw that Wang Shi's clothes were still clean, so he handed Wang Shi the car keys.

Wang Shi ran down the street and drove to the store.

This is a German Mercedes-Benz fifth-generation model produced in 1972, codenamed w116.

This is the most important model in the history of Mercedes-Benz. Since then, the Mercedes-Benz S-Class has opened a new chapter in luxury sedans.

?The fifth-generation Mercedes-Benz S-Class initially launched three models: 280?s, 280?se and 350?se. The body dimensions are 4960mm long, 1870mm wide, 1410mm high, wheelbase 2865mm, body weight 1665kg, equipped with a double roof

A 6-cylinder 2.8-displacement gasoline engine with a camshaft.

For the first time, w116 uses ABS anti-lock braking device, making braking more stable.

The so-called anti-lock braking device, to put it simply, is that the computer unit controls the solenoid valve to hit and close the brake solenoid valve according to the speed signal from each wheel speed sensor, which is equivalent to applying the brakes at high frequency to prevent the wheels from being blocked.

Locking is in a state of rolling and sliding (the slip rate is about 20%), which prevents the vehicle from suddenly braking when braking, making the braking smoother.

It has traveled 60,000 kilometers.

The four-stroke of a four-stroke engine we often refer to refers to the four strokes of intake, compression, power and exhaust.

Intake is like breathing before we work. At this time, the intake valve opens, the piston starts to move downward from the top dead center, the mixture of gasoline and air enters through the intake valve, and the piston moves to the bottom dead center of the intake valve.

The intake valve is closed under the action of the camshaft, and the intake stroke ends.

At this time, the intake and exhaust valves close, the piston begins to move upward under the inertia of the crankshaft, and the compression stroke begins.

The mixed gas begins to be compressed. When the piston reaches top dead center, the spark plug ignites, igniting the compressed mixed gas in the combustion chamber. The expansion force caused by the explosion pushes the piston downward, and the power stroke begins.

When the piston descends to the bottom dead center, the power stroke ends, the piston begins to move upward under the inertial force of the crankshaft, the exhaust valve opens, and the burned exhaust gas is discharged from the exhaust valve.

This is a complete four-stroke process.

Use tools to remove the spark plugs from the six cylinders and take a closer look.

Among them, the spark nozzles of the second and fourth cylinders were red with signs of burning, and there was also a lot of carbon deposits.

The spark plug is the ignition system of a gasoline engine. It ignites the mixed gas in the combustion chamber to cause an explosion, which generates thrust to cause the piston to continue working downward.

The spark plug is in direct contact with the combustion chamber. The high temperature of the combustion chamber makes the spark plug failure rate very high. Secondly, the red color of the four-cylinder spark plug is a sign of spark plug failure.

"Boss, there's a problem with your car, and it's just these two spark plugs." Wang Shi put the six spark plugs on the table and pointed to the two more obvious two-cylinder and four-cylinder ones.

Second, the spark plug failure of the four-cylinder caused the two cylinders to not work. The engine was running unbalanced, causing vibration and lack of power. It was easy to stall especially when going uphill.

"Do you have any new ones here?" the boss asked.

"It just so happens that I just bought some. Although they are not specific for Mercedes-Benz cars, they are still better than these two. You can just use them. When the time comes, you can replace them with original ones. It is difficult to find these in China now, as you know."

Wang Shi said.

"That's okay. I'll trouble you to install it. Then I'll go back and find a repair shop to replace the original ones." The other party also knows that the country is not open yet, and these original imported parts have not come in yet.

"Okay." Wang Shi then replaced the new spark plug, and then used a pressure gauge to check the air pressure in the cylinder. It was normal, which shows that the piston and cylinder liner in the combustion chamber are well sealed.

After changing the spark plugs, I saw the wear and tear on the four wheels and told the other party.

There is no four-wheel alignment adjustment yet, but there is another stupid way, which is to adjust the four wheels to avoid uneven tire wear.

This is a tire with front and rear symmetrical patterns regardless of rolling direction. The interchange method is to interchange the left front wheel with the right rear wheel, and the right front wheel with the left rear wheel.

After replacing the wheels, he inflated the wheels with the new air pump he just bought, measured the tire pressure, and then drove outside for a lap to troubleshoot the problem.

This repair, including accessories, costs a total of eighty yuan.

Repairing cars is the biggest profit point, and it is also the most profitable source for various repair shops.

This is why some unscrupulous repair shops often use supporting factory parts as original factory parts and buy them to customers to make huge profits.

Wang Shi finally found this batch of spark plugs in Beijing a few days ago, so he bought a batch of them. There were only thirty-one of them. He didn't expect to use them so quickly.

What a pity, it would be nice if there were tires.

When it comes to troubleshooting, the boss doesn't care about original parts or supporting parts, as long as it doesn't affect his time when driving.