The weather is getting hotter and hotter. How painful it would be if a car couldn't run empty. So I repaired a Big Dipper yesterday, and that's the problem. The idle starts without shaking and the accelerations are very weak. If the car is empty, it will not go as fast as an electric car.
Beidou Star has an engine capacity of 1.4, and the red color looks more festive. This engine is also very fuel efficient and is particularly easy to use in urban areas.
The car has covered 63,000 kilometers in five years. According to the owner's report, this problem has been occurring for approximately six months, during which the spark plug ignition coil throttle assembly and fuel injection head have been replaced. Neither resolved the problem and the measured fuel pressure was within the normal range. After listening to the car owner's description, the techMaintenance technician checked the engine with a diagnostic instrument and found that there were no fault codes. Additionally, the engine is muffled when the throttle is opened and the engine distributor box makes a slight "hissing" noise. The service technician suspected it was a problem with the engine's timing chain because he had encountered the same problem before.
The maintenance technician opened the oil inlet and gently pulled the timing chain with his hand. When you find that it can be pulled and the gap is particularly large, you discover a problem. The problem of the engine not vibrating when accelerating is caused by the stretched timing chain.
As you can see in the photo, after removing the valve cover, we found that the chain was stretched so much that the timing chain was stretched, causing errorss synchronization. If you don't repair it for so long. If the chain falls, it will hit the valve and damage the engine.
Changing the chain is a bit tedious, and the front bumper also needs to be removed, as the generator and compressor need to be removed. This time the engine was not lifted, but replaced directly in the car in order to save the car owner money. If the engine is lifted, working hours will increase if left too long. Drain all antifreeze and refrigerant.
We can see that the gap in front of the engine is extremely small. This is the service technician removing the timing cover from the engine. Simply remove this cover and you will be able to see the motor chain. The oil pan, along with the vertical beam beneath it, must be removed.
Here is the oil pan removed. It's very dirty inside. Will be cleaned thoroughly later.
C'is the distribution chain. When replacing, the chain slide rail and tensioner must be replaced.
This is the deleted string, much longer than the new one. This is where the problem lies.
When installing the timing chain, these three points must be aligned with the marks on the chain. Otherwise, the car will not hit you.
This key was also deformed when the maintenance technician took the engine apart. I guess it's a screw problem.
After replacing the chain, the engine ran smoothly, the sound was quieter than before, the speed increased sharply, and the test drive proceeded normally. The owner is very satisfied.
Faults in Beidou Star cars
The rotor of the Beidou Star generator is removed as follows:
1 First, start the car and turn the wheels to the right. , then turn off the wordeur and disconnect the car key, then open the hood and disconnect the negative battery terminal. Use a Phillips screwdriver to remove the four screws from the front bumper. Use a 5mm Allen wrench to remove the two screws on the side of the front bumper. Remove the splash guard.
2. Use a small ratchet to pull the Use your hands, post and 7mm socket to remove the screws at the bottom of the front bumper. Remove the screws connecting the splash shield to the fender and the fender can be removed. The function is to reduce the wind resistance coefficient based on fluid mechanics and make the car run smoother.
Beidou Star K14 water pump disassembly steps
■Battery: I often hear many people say that the car battery has a hanging point and the car won't start after being parked overnight! In fact, it has a lot to do with weather conditions.s!
Car batteries rely on the ionization of lead acid to produce electricity. However, at low temperatures, the ionization activity decreases in this case. The solution is to first buy a box of battery activator (a box costs only a few tens of yuan) and add it to the battery water filling port. Perhaps it can be "resurrected" on site if it is a maintenance-free product; battery without water filling hole, try wrapping the battery with a warm towel to let it "warm up", there should also be a chance to "regenerate"! Either way, if it doesn't work, there is no loss in replacing it with a new battery!
■ Alternator: When the car is driving, the headlights turn on and off suddenly and the engine idle speed becomes unstable. This is probably because the car's generator cannot producere of electricity after being used for a long time! When this kind of problem occurs in an auto repair shop, they usually ask you to replace the entire car, and the price is around 8,900 to 10,000 yuan per car. It's so expensive! In fact, a generator is simply a coil rotor and an electromagnet.
It is unlikely to break if you hit it with a hammer. How can it malfunction during normal use?
So more than 90% of generator faults are because there is a rectifier crystal on it. This item will indeed break if used for a long time at high temperature.
p>However, it is not enough to replace it with a new one. Two to three thousand yuan! Next time, if your car's alternator breaks down, you can ask the auto repairer to simply replace the crystal.
This will solvedefinitely the problem and will save a lot of money!
■Fuel Computer: It must be hard to imagine the engine computer failing! Actually, this is because the computer power supply has many fuses to protect it.
However, there may be unforeseen circumstances if one of the sensors is unlucky enough to send an excessive peak signal back to the computer. it is not unreasonable to hang it on site. Maybe !
The fuel supply computer is actually very difficult to break. If it breaks down, it's certainly a major problem: the engine will never start and replacing it with a new one will certainly cost a lot of money. money! Unless soaked in water, a bunch of IC boards, crystals, capacitors... in the fuel computer will never fail together. At most, a capacitor will burn out, simplynt because a capacitor costs between 20,000 and 30,000 to buy a new one. Computers aren't worth it. There are electronics stores that specialize in repairing car computers, no matter how you repair them, it costs less than replacing them with a new one!
■Air conditioning compressor: Air conditioning is not cold. After taking the car to the repair shop for inspection, it was determined that the air conditioning pipeline was not leaking and the refrigerant quantity was good. not reduced.
However, when the air conditioning switch is turned on, the compressor does not work. At this point, the problem focuses on the air conditioning compressor! A brand new air conditioning compressor costs tens of thousands of dollars anyway, which is really expensive! However, sometimes the compressor does not work and this is not a problem.ec the main body; if the compressor is removed and the pulley is turned, it will not get stuck. In this situation, you can ask an auto repair shop to try to overvoltage the electromagnetic clutch of the pulley (connect the wire to the positive pole and the compressor body to the negative pole). If it doesn't work, it is simply a defect in the electromagnet, and you only need to spend two to three thousand yuan to replace it. This stuff will do the trick!
■Belt puller: The peripheral operating parts of the engine (generator, air conditioning compressor, power steering pump, etc.) all depend on the belt connection to obtain the operating power of the engine , and the belt must maintain a certain tightness can completely transmit power.
This part must rely on the corresponding belt tension pulley. If the belt tension pulleyIf worn for a long time, it will make a high-pitched “squeaking” sound.
When you get to the repair shop, the factory will always call you “replace”! Don't worry! Unless it is an idler gear assembly which is stamped and formed by a machine, otherwise the failure is caused by the rolling of the idler gear! Why spend thousands of dollars to replace the entire rollers when you only need ten or a hundred dollars to replace a new bearing?
■Automatic transmission: It relies on ATF as a means of transmitting power. Loss of part of the power is a congenital defect. In addition, the complex internal oil circuit,
continuous. wet transmission friction The clutch disc and brake band, high temperature and high oil pressure prevent the automatic transmission from having as long a life as a manual transmissionuelle.
Once the end of life is reached, usually the automatic transmission produces a lot of operating noise, and some gears even disappeared later, so I had to replace it with a new one! ?
A brand new product costs tens of thousands or hundreds of thousands, which is really expensive! In fact, the only things that can break or wear out in an automatic transmission are the clutch disc and brake band.
Replace these two parts and add an ATF oil filter. This is an automatic transmission overhaul kit. kits. It's only a few thousand yuan.
No matter how expensive the salary is, it's still only ten thousand yuan! It's just that there aren't many auto repair shops that have the technology to repair automatic transmissions, so you can also ask the manufacturer to see if there is a repair shopspecialized in the repair of automatic transmissions of the same type. the transmission only takes two or three Wan, it might be cheaper to replace the broken one, which is also a good way to save money!
■The water tank motor suddenly ran out of water:
When the water tank motor is running, it generates high temperatures and must use the circulating water to dissipate heat!
But one day, while the car was driving and suddenly the engine started smoking - Oh my God! The water had disappeared and turned into jets of steam!
There are generally only two reasons for this situation, one is the failure of the cooling fan, the other is the leakage of the water circulation pipe.
p>If the culprit of the leak is found during the diagnosis at the garage. If the water tank is cracked, the factory will usually ask you to replace it with a new one howeverHowever, a cracked water tank can actually be repaired! The water tank is made of aluminum. If a minor crack is found, it can be repaired by aluminum welding or brazing.
It only costs a hundred yuan salary and you can save a lot of money. on the spot. Thousands of dollars to replace the water tank! ■Driveshaft: Have you ever heard the sound of “kada, kada” coming from under the chassis whenever you take a turn while driving?
The crux of the problem mainly occurs in the wear of the universal joint of the driveshaft. This problem often occurs in front-wheel drive vehicles.Question! If you go to a garage for a repair, most manufacturers will tell you to replace the entire gasket, but the relative price will be several thousand yuan. In fact, the universal joint can wear out.
p>This. is due to the fact that the dust cover attached to the joint isbroken, causing lubricating grease to leak inside the dust cover and dust to infiltrate. In this situation of lack of oil and a lot of dirt, of course, the universal speed is accelerated. Worn seals! Therefore, if the wear is not serious, you can simply replace the dust cover (each only costs one or two hundred yuan) and add lubricating oil, and the drive shaft can still be used for a long time ! And if the wear on the cardan shaft is too great, you can also replace only the joint part; anyway, there is absolutely no need to replace the entire driveshaft! ■Wheels: For the sake of beauty, beautiful aluminum alloy rims are currently one of the key points of car modification for almost every car owner! However, it is difficult for aluminum rims to deform under the torment of the wheels.rally-level tires like Taiwan, causing steering wheel and body vibration while driving. At this point, do not rush to replace the warped aluminum rims! Currently, there are many tire shops on the market specializing in repairing modified aluminum rims. Repairing a good aluminum rim only costs a few hundred dollars, so it's worth your referral!
■Brake branch: The machine will break after being used for a long time, but it will actually break if not used! For cars that have been parked for a long time and only driven once,
The most common problem is the brake lever. Due to long-term use, the brake cylinder of the brake lever is prone to rust. , which in turn causes brake failure. If the brake pad is stuck on one side and the brake is not strong enough, if you send it for repair, most repair shops will ask you to replace the entire brake brake;
< p>In fact, the structure of the brake brake is also simple, just need to spend a few hundred yuan to buy a component repair kit, replace the rusty piston and oil seal, and you will be fine!Unscrew the four screws of the water pump, then remove the generator and the air conditioning belt, then remove the crankshaft wheel, then remove the timing cover, then remove the timing belt. It's time to replace the water. pump
1. Water leak (mild and severe water leak) A slight water leak will only leave traces of coolant color on the water pump vents. The most serious case is a direct water leak, leading to symptoms such as high water temperature due to lack of coolant. 2. Low circuit capacitylation: If the circulation capacity of the water pump is low, high water temperature will occur, especially in summer; south ; 3. Abnormal noise; If there is a problem with the internal bearing of the water pump and there is an abnormal noise driven by the belt, it may be slight and you may not notice it.