What Does the Third-Level Maintenance of a Vehicle Include?
2 Answers
Third-level maintenance is typically performed at intervals of 36,000 to 40,000 kilometers. It is a maintenance measure implemented after several rounds of second-level maintenance to consolidate and preserve the normal performance of various assemblies and components. This maintenance is conducted after the vehicle has traveled a significant distance and involves servicing the assemblies and components. The main tasks include: 1. Disassembling and inspecting the engine, checking the condition of the cylinders, pistons, piston rings, connecting rods, and bearing wear. 2. Removing carbon deposits, gum deposits, and cooling system scale, as well as grinding the valves and adjusting their clearances. 3. Disassembling the front axle, steering system, transmission, drive shaft, rear axle, suspension, and brake assemblies for cleaning, inspection, adjustment, and troubleshooting. 4. Inspecting the frame and body for rust and performing touch-up painting if necessary.
A Level 3 car maintenance is equivalent to giving your beloved vehicle a comprehensive physical examination plus deep therapy. Last time I did it, I noticed the items were extremely detailed: The chassis had to be completely disassembled to check for looseness or deformation in each suspension arm ball joint, and the driveshaft universal joint clearance also needed measurement. For the engine, it wasn't just about changing the fluids and three filters; cylinder pressure had to be measured and carbon deposits cleaned. Transmission fluid and differential oil had to be thoroughly replaced. The brake system was disassembled to inspect the caliper piston guide pin return condition, with wear data measured at six points just for the brake discs. The tightness of steering linkage and other connecting parts had to be adjusted. They also discovered slight oil leakage in the rear shock absorbers and replaced them promptly. Air conditioning duct cleaning and condenser dust removal were included as well, finishing with a four-wheel alignment and dynamic balance. The whole process was like giving the car a complete rebirth – driving it afterward, the steering felt noticeably lighter, and it handled speed bumps much more steadily.
