Super Car Sales System

Chapter 166 Change the Oil

Chapter 165: Change the Oil

Because there are two ways to replace the engine oil now, one is to use a circulator, and the other is a conventional replacement method, that is, unscrew the oil drain screw of the oil pan and drain the oil from the bottom.

The method of draining oil from the sump is the most common and also the easiest and cheapest.

To say that this method is simple is actually not easy for a car novice like Ma Hong compared to those auto repair masters with rich skills and experience.

"I think it's very simple, and there is nothing difficult." Ma Hong said a little unconvinced, "I have seen the masters in the auto repair shop lift the car up, then unscrew the oil release screw, and use an air gun to refill the engine oil. Blow the nozzle for 2 minutes, put it clean, tighten the oil drain screw and wipe it with a paper towel to see if there is any oil leakage, it’s nothing too technical, it’s very simple..."

"No high technical content? It's very simple?" Fang Yuan would not quarrel with customers, but just asked Ma Hong, "Do you know what preparatory work needs to be done before screwing the oil drain screw of the oil pan? Do you just screw the screw?"

"Do you have a lift to raise the car?"

"Can you guarantee that you won't get burned by engine oil because you are unskilled or careless?"

"Do you know how much engine oil is appropriate?"

"Did you know that some oil drain screws are disposable?"

"Do you know how much torque is required to tighten the oil drain screw on some models?"

……

When Fang Yuan asked Ma Hong questions, he was always smiling, but one question after another still made Ma Hong confused. He didn't know Fang Yuan's question, so he immediately froze in place.

Seeing the confusion and puzzlement on Ma Hong's face, Fang Yuan smiled. He wasn't making fun of his clients, he was making fun of himself. If he didn't have the skills of primary maintenance and maintenance of used cars, he wouldn't know how much attention there is.

"When draining oil from the oil pan, the car engine must be started first, and then turned off when the water temperature reaches the normal range." Fang Yuan explained that this is to allow the engine oil to flow fully in the engine, thereby taking away the impurities inside , to ensure that after changing the oil, satisfactory results can be achieved.

The next step is to lift the car up with a lift, find the oil pan screw and unscrew it.

Speaking of this, Fang Yuan seriously told Ma Hong that if there is no lift, he does not recommend using a jack instead.

Those auto mechanics can do this because they have rich experience and know how to use the jack correctly, but what about Mahon?In case the jack loosens and moves when drilling below, it will be too late to regret.

"Ah?" Ma Hong thought that what Fang Yuan said was right, he felt that only by lifting the car up with a lift would there be enough space for better operation.

"After unscrewing the oil pan screw, pay special attention, because the temperature of the oil inside is very high at this time."

Some auto repair masters use special lifts, and sometimes they may be injured if they are paralyzed. If Ma Hong only uses a jack to operate in such a small space, he will be burned if he fails to dodge a little.

"En." Ma Hong nodded, feeling that what Fang Yuan said was very correct, and that it was indeed what he said.

"Even if you bought a lift and successfully drained the oil, some models have oil pan screws that are disposable and must be replaced each time along with the rubber ring on the screw."

Ma Hong panicked: "One-off? Where can I buy these screws?"

"I mean the oil pan screws in some models are disposable, but not in this Trumpchi GS4."

Fang Yuan told Ma Hong that the oil pan screws of some models are not only disposable, but some are made of special materials. When tightening the screws, a torque wrench must be used, and the torque specified by the manufacturer must be strictly followed.

The torque is too high, and it may be broken inside.

If the torque is too small, the oil will leak, and it needs to be reworked, unscrewed and reinstalled.

When adding engine oil, it is not poured casually.

Do not fill the engine oil beyond the maximum mark, otherwise it will not only waste the engine oil, increase the loss of internal power of the engine, but also accumulate a lot of carbon deposits in the long run, and in severe cases, there may be artificial burning of engine oil.

You must know that the consequences of burning engine oil are very serious. It will cause the blockage of the three-way catalytic converter, and it may even be scrapped directly. At that time, it will not be a matter of spending a small amount of money to clean up the carbon deposits.

"I see that other people's work is simple, but it's not easy after listening to your detailed explanation. I don't think this method is suitable for me." Ma Hong thinks that professional tools and rich experience are needed. For ordinary people like himself who have not been trained Said, it is simply too difficult, already planning to give up.

But Ma Hong was curious about the other method that Fang Yuan said, and wanted him to briefly explain it to himself.

"The second method is to use a professional circulating machine to change the oil." Fang Yuan said that compared with the traditional method of draining oil, the method of using a circulating machine to change oil can clean up some dirt on the oil pan, more thoroughly, and It can avoid removing the oil drain screw of the oil pan.

But it takes a long time, wastes oil, requires professional machinery and equipment, and is expensive.

Now, except for the after-sales of automobile 4S stores, only some regular auto repair factories will use the method of oil change of circulating machines.

At the same time, not all engines can use cyclers to change oil.

For example, some models do not have mechanical oil gears, so oil can only be drained from the oil pan.

Hearing Fang Yuan's explanation that professional machinery and equipment must be used, Ma Hong smiled wryly. In order to save the money, he didn't even need to buy a recycling machine.

Listening to other people's advice, changing the engine oil after a full meal is already so troublesome. Ma Hong felt that it was not easy to change the third filter, brake fluid, and transmission oil. As Yuan said, I plan to buy things in the future and find a reliable auto repair shop to replace them.

However, Ma Hong felt that it was unrealistic for him to maintain himself. Simple washing of the car could always be done, right?

"This is totally fine." Fang Yuan said that simple car cleaning can be done by himself, as long as the tools are prepared, sometimes the effect is no worse than that of a car wash.

Fang Yuan suggested that Ma Hong buy a set of water guns, and also prepare tire foam polishes, asphalt cleaners, high-foam cleaners, anti-rust lubricants, surface waxes, and car cleaning soft glue that can be used for exterior cleaning.

These things are not expensive, and can be easily bought on the Internet and in stores, but the effect is good, such as dirt that is not easy to clean in the crevices of the car, debris and sundries in the storage compartment, bird droppings on the surface of the car, etc. Clean up is quick and easy, and you'll have a brand new exterior and interior in minutes.

After successfully answering Ma Hong's question, Fang Yuan then introduced the fuel consumption of Trumpchi GS4.

Fang Yuan said to Ma Hong: "Because this Trumpchi GS4 uses Aisin's AT gearbox, even if it is only six-speed, its fuel consumption is not very high, usually eight to ten. related to driving habits.”

"It's okay. The traffic from my home to the company is not very congested. I don't often drive with floor oil. I don't think the fuel consumption will be very high." Ma Hong thinks what Fang Yuan said is right, the level of fuel consumption and personal driving habits are indeed It has a lot to do with it.

Ma Hong had a question at the end. He heard that domestically-produced cars had many problems, and he was afraid that the GAC Trumpchi GS4 would be the same.

In fact, even if Ma Hong didn't take the initiative to raise the common problem, Fang Yuan would tell him.

"Domestic cars are indeed as you know." Fang Yuan compared the problems of domestic cars with joint venture cars.

Joint venture cars and imported cars are not to say that they are not bad, and those Japanese god cars will still have various problems.

It's just that they also have other problems, but the main common problems are very concentrated.

For example, the old Cruze is simply a car that is annoying to everyone and worrying about ghosts. It can be said that there are many problems.

However, its main problems are relatively concentrated. As long as you hear the sound of air leakage in the engine compartment, you can guess that the valve cover is leaking air. In addition, there are engine knocking, engine oil leaking into the coolant, and the transmission module. Damage, etc., are all common problems that the old Cruze broke out in a very concentrated manner.

Another example is the Mazda cx4, which has a sporty shape, good handling, and good directivity. Its problems mainly focus on poor sound insulation, engine vibration, abnormal noise from the gearbox, and abnormal noise from the steering column after the mileage increases.

Domestically produced cars are different. Hundreds of cars in the same batch may have a hundred kinds of problems. The owners need to maintain them carefully and pay attention to them. As long as they are repaired in time, there will be no major problems.

Specific to this GAC Trumpchi GS42018 [-] model, there was an indirect fuel cut-off at the start. The engine lacked cylinders, resulting in insufficient power and loud vibration and noise, and the vibration was even worse when the air conditioner was turned on.

Not only does its engine vibrate loudly, but it also has a certain chance of oil emulsification, but the car Mahon wants to buy does not have this problem.

In addition, this six-speed AT gearbox of Aisin also has setbacks and abnormal noises. In winter, it is difficult to shift the first and second gears, and there is a rattling sound.

Compared with the abnormal noise and vibration, the battery quality of the 2018 model is too poor, and the power loss seriously affects the normal use. If the car is a little older, if it is not driven for a week, you will have to find a car to take a battery.

Fang Yuan reassured Ma Hong that the Trumpchi GS4 in front of him had already replaced the battery of another brand, so it should not run out of battery too fast.

……

Fang Yuan explained all the advantages and disadvantages of this car clearly. Ma Hong felt a sense of smoothness all over his body. Furthermore, Fang Yuan told the things to pay attention to in maintenance. After thinking about it for a while, he decided to buy this 2018 model. Trumpchi GS4235T automatic two-wheel drive elite version.
(End of this chapter)