Reborn in 1982: I Became the Richest Man by Repairing Cars

"I've encountered that before!"

A young mechanic quickly said, "Last time our factory encountered a CA10B, it was the same situation."

"I was hauling a truckload of steel, and even with the accelerator floored, the truck couldn't go any faster uphill."

"It was still emitting black smoke, so we could only move it slowly, which almost made us late."

Jiang Hui said with a smile, "This is a typical case of insufficient power, and there are four main reasons for the malfunction."

To everyone's surprise, Jiang Hui immediately listed four possible causes of the malfunction.

Immediately, more people took out their notebooks to take notes.

"The first problem is a clogged air filter."

"Think about it, engine combustion requires a mixture of air and gasoline, and the air filter is like our nose."

"If it gets blocked, air can't get in, the air-fuel mixture will be too rich, combustion will be incomplete, the power will be insufficient, and it will also produce black smoke."

He pointed to the air filter next to the engine: "The maintenance method is very simple. Check it regularly. If it is a paper filter, take it out and blow it clean with compressed air."

"If it's a cloth filter, wash it with gasoline, let it dry, and then put it back in."

"If the blockage is too severe, just replace it."

"Our Shougang trucks run through coal yards all year round, where there is a lot of dust in the air, making the air filters more prone to clogging."

"I suggest that everyone check it every 2,000 kilometers, instead of waiting until a problem occurs before fixing it."

This type of problem is rarely seen in engine failures in later generations.

On the one hand, the quality of air filters has improved, and on the other hand, the driving environment has become better.

"The second reason is insufficient cylinder compression pressure."

Jiang Hui tapped the cylinder block with a wrench. "The cylinder is like the 'heart' of the engine. If the cylinder is not sealed well and the compression pressure is insufficient, the power generated by the combustion of the air-fuel mixture will leak out, and naturally, there will be no power."

"The main causes of this malfunction are worn piston rings, scored cylinder walls, or poor valve sealing."

With the support of the system and his previous life's experience in car repair, Jiang Hui could talk about these common malfunctions with ease.

He exudes confidence.

This made the people present more convinced of his abilities.

"How do we determine this situation?"

"We can use a cylinder pressure gauge to check it. The normal compression pressure should be 8 to 10 kilograms. If it is less than 6 kilograms, it means there is a problem."

Jiang Hui tried his best to use simple and easy-to-understand language to describe it.

In fact, many terms used in the auto repair industry do not necessarily match the descriptions in books.

For example, when talking about "force", books certainly wouldn't use "kilogram" as the unit.

There are also things like "ram's horns," which even people with formal training probably wouldn't understand.

"The repair method is actually very simple: if the piston rings are worn, replace the piston rings."

"If the cylinder wall scoring is not severe, cylinder boring repair can be performed."

"In severe cases, the cylinder block may need to be replaced."

"If the valve is not sealing properly, just grind the valve. Our experienced mechanics should be good at this."

As Jiang Hui's explanations became more and more targeted, the level of recognition the masters present had for him also continued to increase.

Opportunities to perform such a comprehensive and systematic analysis of engine faults are very rare.

The key issue is that even experienced craftsmen who understand these things don't have the ability to systematically organize and analyze them.

"The third reason is that the fuel injection timing is inaccurate."

Jiang Hui pointed to the fuel injection pump, "If the fuel injection advance angle of the fuel injection pump is too early or too late, it will affect the engine's power."

"If you ignite too early, the air-fuel mixture won't be fully compressed before the engine knocks."

"If it's too late, the air-fuel mixture will be fully compressed, but the ignition will be delayed, resulting in incomplete combustion and insufficient power."

"The injection advance angle for both CA10B and CA10C is 15 to 17 degrees. You can use a timing light to measure it. If it's inaccurate, just adjust the fuel injection pump connector."

At this moment, Jiang Hui was getting more and more into his speech.

Fan Weiming, who was standing next to him, was also seeing Jiang Hui in this state for the first time.

He had some reservations about his father arranging for him to become an apprentice.

Now those doubts have completely disappeared.

Even the repairmen in Shougang's workshop have to listen to their master's lectures, so what more could I possibly want?

"The fourth reason is a blocked exhaust pipe."

Jiang Hui continued, "If the exhaust pipe is blocked by carbon deposits or debris, the exhaust gas cannot be discharged, and the fresh air-fuel mixture cannot enter, so the engine will naturally lack power and may even overheat."

"The repair method is also simple: remove the exhaust pipe and clean out the carbon deposits and debris inside."

"If the pipe is damaged, you can just weld it or replace it."

At this point, another mechanic asked, "Teacher Jiang, there's another problem: the engine is prone to overheating, especially in the summer. It doesn't run for long before the water temperature gauge goes off."

"We can only stop the machine to cool it down, which is very time-consuming. How can we solve this problem?"

After acknowledging Jiang Hui's abilities, some people naturally hoped to find practical solutions to the problems they encountered in their daily lives.

Jiang Hui was not intimidated by this situation at all.

"The situation you described is also a common fault in CA10B and CA10C."

Jiang Hui answered immediately without hesitation.

There are three main reasons why the engine overheats.

"The first problem is a water pump malfunction."

"The water pump circulates water to the engine. If the water pump breaks down, the water won't circulate properly, the engine's heat won't dissipate, and it will naturally overheat."

"Everyone can check it. If the water pump is leaking or not rotating smoothly, it's broken and you can just replace it."

"Also remember to replace the water pump's gasket, otherwise it will leak."

Small details can sometimes best reveal a person's level of competence.

Jiang Hui's reminder earned the admiration of several experienced workers present.

"The second reason is a clogged radiator."

"Radiators are what we commonly call water tanks. Over the years, their surfaces accumulate dust and catkins, and scale builds up inside."

"When the blockage occurs, the heat dissipation effect will be poor, and the engine will be prone to overheating."

"The repair method is also very simple. Just use a high-pressure water gun to clean the surface dust. Be careful not to wash the heat sink crooked."

"The limescale inside can be removed by soaking it in water with citric acid or vinegar for a period of time, and then rinsing it with clean water to restore its heat dissipation effect."

For each fault, Jiang Hui could point out several possible causes, analyze them, and provide solutions.

This kind of comprehensive fault diagnosis definitely requires a lot of skill.

In particular, the engines of different car models are not the same.

Some experienced mechanics are quite familiar with the car models they frequently work with and can repair most of the faults.

But after changing to a different car, the situation immediately changed.

However, this problem does not exist for Jiang Hui.