The 4 parts of my JAC 490 Quanjiao engine just changed ran 1000 kilometers and burned oil, is it nor

Abnormality, accessory problem or assembly problem.

Abnormal. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

If there is really no quality problem with the four matches, it is likely that the oil ring on the piston is installed in the opposite direction. Correct installation method, piston oil ring scraper side downward. In this way, the oil can be scraped back when the piston moves downward; If the scrape side is upward, the oil ring keeps pushing the oil upwards, and eventually the oil enters the exhaust pipe with smoke when the exhaust valve opens.

It's not burned out, it's normal to burn off 1 to 2L, it should be run-in after the overhaul, it will be better after the run-in period, remember not to pull up the speed, pull it after 3000, change the oil after 3000 kilometers, don't wait for 10000.

It is difficult to estimate the viscosity of the oil you add to 20-50, and you mind changing it to 15w-40, and you add a dilute oil at a low temperature.

Your reason is not clear, 1, please ask whether there is obvious strain on the piston surface when you replace the piston ring, that is, scratches one by one, if there is no light to replace the piston ring, you need to replace the plug and ring together, 2, if the machine power is no problem after overhaul, and do not burn the oil, but after a period of time start to burn the oil, please check whether the air filter is installed correctly, and check whether there is air leakage at the intake branch pipe and connection, if there is, Dust will directly enter the cylinder combustion chamber and scratch the cylinder joint surface and piston rings when the piston is working, causing oil burning. 3. Please check whether the piston ring is installed correctly, the position and angle of the oil ring and the air ring are required, if the installation is wrong, it will not play any role. I hope you find the above answers helpful.

In many cases, it has to do with whether the driving habit is maintained in a timely manner. Due to the disrepair of a certain link in the locality, many places have problems one after another, which is an inevitable phenomenon. Another reason is that the repair shop does not act, and cannot better timely and accurately judge the fault point, resulting in misrepair and misreplacement, which makes the condition of the car worse.

It is recommended that you change the repair shop, boring the cylinder or change the piston rings to try again.

Since the environment is almost the same, a very important thing is that the air filter should be cleaned frequently, as the saying goes, the disease comes from the mouth, and this is how to maintain the hunger is very useful for the engine, I hope it will help you.

In a variety of cases, on the one hand, there is a problem with the quality of the accessories. Then there is a problem with the method of use. Or it has more to do with the work environment. Check the cylinder head to see if there is a problem.

Directly overhaul the cylinder liner, piston, pad, crankshaft, valve, find a better place to boring the cylinder, or it is useless.

Do you burn the engine oil for the four sets or burn the engine oil after the change? Remember, burning engine oil is a four-match thing, not the valve oil seal. Didn't you find a fault and changed the four sets? Get in touch again!

I don't know what the situation is, my engine is also newly replaced, and now I have a headache for 1000 kilometers to add oil, and I am negotiating to deal with the problem, and it has not been solved for a month, and there is no way to complain.

The engine oil itself is consumed before or after starting, and if it is consumed too much, it will burn the engine oil. There are many factors that affect the burning of engine oil, such as: the quality of fuel, whether the road surface is rough, driving habits, car maintenance, etc., these reasons will aggravate the oil consumption and cause the oil to burn, so that the vehicle appears

A large amount of carbon deposits appeared in the combustion chamber, which caused the air ring of the piston ring to get stuck and not move, resulting in poor sealing.

The oil generated in the lubrication makes the oil return hole of the oil ring blocked, and the ability to scrape the oil is constantly weakened. Wear occurs between the piston and the cylinder wall. The valve seal is corroded, aged, and the seal performance fails.

Every car has a ventilation system exhaust valve, which can also exacerbate oil consumption if something goes wrong. There is a problem with burning engine oil. In the past, it could only be dismantled and repaired, but now there is a plan to solve the problem of burning engine oil without dismantling and repairing.

If there are obvious steps in the four matching 4000 km cylinder liners that have just been replaced, 1: you let the engine overload during the run-in period; 2: There is a problem with the assembly of the piston ring; 3: Fourth, there is a problem with the quality of the package.

See if it's a leak from the valve seal, or if the piston rings are staggered at the wrong angle.

Oh, pull the cylinder, take this change! Anyway, it is also during the warranty period, did you change the piston ring when you changed the four matches?

And then there's the difference between a piston supercharged and an unsupercharged one! What's worse is that you are replaced with a fake piece

According to the analysis, you have used the accessories that have been produced, the piston rings are worn early, and the quality of your air filter is too poor, resulting in the early wear of the engine piston rings.

Don't run in place after just changing the four packages, this is a mistake made by many people.

Another is that your air filter is not good, take it apart and see if the combustion chamber of the piston is red.

Don't be so troublesome, a few hundred dollars can be managed, overhaul is not the best way.

The engine oil itself has a certain amount of consumption, and excessive consumption is the problem of burning engine oil. There are many factors that affect the burning of engine oil, such as: fuel quality, driving conditions, driving habits, maintenance habits, etc., the above reasons will aggravate the oil consumption and lead to the burning of engine oil, making the vehicle appear:

1. Carbon deposition occurs in the combustion chamber, which makes the gas ring of the piston ring stuck, and the sealing is poor.

2. The lack of deficiency in the lubrication system produces oil sludge, which blocks the oil return hole of the oil ring and weakens the oil scraping performance.

3. Wear occurs next to the core between the piston and the cylinder wall.

4. The valve seal is corroded and aging, and the sealing performance fails.

In addition, there are now crankcase ventilation systems on the car to change the rubber system (exhaust valve), if there is a problem, it will also increase the consumption of oil. In the past, the problem of burning engine oil could only be solved by dismantling and repairing, but now there is a plan to solve the problem of burning engine oil without dismantling and repairing, which can be understood by taking a look.

It may not be because of the quadruple package.

It is inevitable that the oil that plays a lubricating role between the piston and the cylinder wall in the engine will participate in the combustion, as long as it does not exceed one liter within 5,000 kilometers, it is normal oil consumption, and vice versa. The lack of engine oil will cause the stupid cherry engine to spill the heat of the gear, the car will shake abnormally, the water temperature will be high, the valve will sound, and in serious cases, it will even strain the cylinder wall or burst the cylinder.

Burning engine oil is basically caused by piston ring stagnation. As long as there is no serious strain on the cylinder wall, it does not need to be overhauled. Changing the maintenance of high-viscosity engine oil is only an expedient measure to treat the symptoms rather than the root cause, and it will do more harm than good.

The solution to burning the oil.

In the habitual thinking of car enthusiasts, they always think that burning engine oil should be overhauled, so that they not only have to bear high maintenance costs, but also bear the unpredictable risks and depreciation losses brought about by the overhaul. Destroy the airtightness and precision of the engine. And there is a possibility that the engine oil will burn again after tens of thousands of kilometers, so overhauling the engine is not sustainable.

Now the no-dismantling technology has been very mature and gradually accepted by the majority of car owners. In particular, the non-destructive repair products containing PNF patented technology have completely gotten rid of the technical shackles of burning engine oil and having to go to the auto repair shop for overhaul, without removing a screw, repairing and releasing the piston ring stuck engine oil while driving, with remarkable results.

It is estimated that the engine has a defect and has relapsed, maybe there is a problem with the cylinder.

Only a few months, during the warranty period, asked them to change the car or change the engine. It's really not possible to return it.

Hurry up and go to them again to fix it.

Three guarantees for cars.

1. Change cars. The car can be replaced if the same fault is repaired more than 5 times.

During the validity period of the three guarantees (the validity period of the three guarantees is 2 years or 50,000 kilometers, whichever comes first), if the car repair time exceeds 35 days, or the repair caused by the same product quality problem exceeds 5 times, the consumer can change the car.

Within 60 days from the date of the seller's purchase invoice or within 3,000 kilometers of mileage (whichever comes first).

2. Return the car. If the engine is still abnormal after two changes, the car can be returned.

During the validity period of the three guarantees, a total of 2 repairs have been carried out due to serious safety performance failures, and serious safety performance failures have not been eliminated or new serious safety performance failures have occurred; or after the engine and transmission have been replaced twice in total; Or the steering system, braking system, suspension system, front and rear axle, the same main parts of the body because of their quality problems, after a total of 2 times of replacement, still can not be used normally, when the consumer chooses to return, the seller shall be responsible for the return.

If the household car product meets the conditions for replacement, and the seller does not have a product of the same brand and model, nor does the product with no less than the original car configuration be replaced to the consumer, the consumer can choose to return the product, and the seller shall be responsible for the return.

3. The owner of the car has the right to drive a spare car after repairing the car for more than 5 days.

During the warranty period, if there is a product quality problem in the household car product, the consumer will be repaired by the repairer free of charge with the three-guarantee certificate, including the cost of working hours and materials.

Friend, you ask the repairman to see if the supercharger is ripping oil! That is, oil leakage! Or see if there's oil in the water!