With regard to overhaul, we propose a relatively overhaul method, which is called medium overhaul. Medium repair is actually a way of car three guarantees. Remove the cylinder head, take out the piston, and clean, inspect and test the related accessories. On the premise of satisfying the overhaul, it is necessary to carry out a thorough overhaul. Without overhaul, check or replace the valve oil seal, timing chain and other related accessories, and install the engine for ignition debugging. This process is completed. In fact, the main purpose of medium repair is to burn engine oil, but to change the oil ring and gas ring of the piston, so medium repair and overhaul are two different working hours. Medium repair generally takes 1 to 2 days, and overhaul generally takes 7 days or even longer. 4000 yuan mainly refers to medium repair.
After burning oil, the problem of burning oil caused by piston ring blockage can be completely solved by replacing piston ring and completing medium repair? Obviously not. Because the root cause of burning oil is not piston ring blockage and seizure. There is another deep-seated reason for the piston ring blockage and seizure, so the oil burning caused by the blockage and seizure is just a demonstration of the oil burning phenomenon. If the blockage and sticking are avoided, this time is the real reason for burning oil. Therefore, it is very common for many repaired vehicles to continue to burn engine oil seriously after one year. Some cars are in better condition, or run longer, maybe two years.
We can see that the whole intermediate repair is actually to replace the piston ring and reassemble the piston, and the process is completed, so its charging standard is not particularly high. Then if it is found that the oil is just a piston ring problem after testing, it can be repaired without major repair. The repair method is actually safer and more reliable, without any loss.