What Does the Secondary Maintenance Include?

[OEli]

Automobile secondary maintenance aims to focus on inspection and adjustment. Here is a detailed introduction to secondary maintenance: 1. Main contents of secondary maintenance: Measure the cylinder pressure of the engine, adjust the valve clearance, clean various filters, the oil pan, the float assembly of the oil strainer, inspect and adjust the wear and clearance of the connecting rod bearings, check and tighten the front and rear engine mounting bolts, inspect and adjust the brakes, perform tire rotation, and check the clutch and adjustments of other assemblies. 2. Secondary maintenance is performed when the vehicle has traveled 6,000~8,000 km: Secondary maintenance involves a more in-depth technical condition inspection and adjustment for vehicles that have traveled a certain mileage, mainly to ensure that the vehicle maintains good operational performance for a longer period in the future. 3. Secondary maintenance involves more tasks: In addition to all the tasks of primary maintenance, secondary maintenance must also eliminate any faults and hidden dangers discovered during the maintenance process. The maintenance takes a longer time and is usually performed by maintenance workers. Before secondary maintenance, the driver should provide the maintenance workers with any poor technical conditions encountered during the vehicle's operation to improve the quality of maintenance.

[DaniellaDella]

I've been driving a taxi for twenty years, so I know all about secondary maintenance. I get it done every 20,000 kilometers, focusing mainly on checking the chassis and replacing filters. The mechanic will remove the tires to inspect brake pad thickness, measure brake disc wear, and check if the suspension bushings are cracked. Under the hood, the three filters must be replaced—the air filter directly affects engine power, the cabin air filter impacts breathing health, and the oil filter ensures proper lubrication. Finally, they'll scan the ECU for trouble codes and have the mechanic adjust the tire balance. The whole process takes about two hours and costs around 800 to 1,000 yuan, but it prevents breakdowns on the road.

[SanJuliet]

As a frequent self-driving traveler born in the 1990s, I believe the focus of secondary maintenance should be on tires and safety systems. During my last maintenance, the technician removed all four tires for cross-rotation to extend their lifespan and save money. What gave me the most peace of mind was when they used equipment to test the water content in the brake fluid - they replaced it immediately when it exceeded the standard, which is literally life-saving! The deep cleaning of the air conditioning system was particularly practical as it sterilized and eliminated odors. During the chassis inspection, they discovered a cracked lower control arm bushing and replaced it promptly - otherwise, it might have caused vibrations at high speeds. Although it costs 300-400 yuan more than a minor service, it helps identify hidden risks in advance.

[GideonMarie]

Last time when dropping off my child at school, I noticed the steering wheel felt loose. After inspection, it turned out that a Level 2 maintenance was due. This service is much more complex than a regular oil change, involving checking all vehicle lighting circuits to prevent fuse blowouts and replacing transmission fluid to protect the gearbox. The mechanic used a stethoscope to check the belt tension, inspected the engine for any oil leaks, and even applied grease to the door hinges. The most crucial part was the comprehensive electrical system diagnosis, as aging window regulators and wiper motors are prone to failure. After the maintenance, the brakes became noticeably more responsive, making driving in rainy weather much safer. It's recommended to perform this service every two years or 20,000 kilometers—safety should always come first.

[JayceFitz]

Veteran mechanics often say: secondary maintenance focuses on prevention. Lift the car on a hoist to inspect the chassis—loose steering ball joints or leaking shock absorbers become obvious at a glance. Remove the spark plugs to check engine combustion; severe carbon buildup calls for throttle body cleaning. Grease the driveshaft universal joints to prevent abnormal noises, and derust/lubricate brake caliper pins to avoid seizing. For older cars, prioritize checking wiring harness aging—use insulating tape to wrap any damaged corrugated tubing. Finally, adjust the handbrake travel—this can be life-saving in critical moments. The entire process is like giving the car a thorough health checkup.

[Lila]

My decade-old car looks brand new after the secondary maintenance. The mechanic focused on fixing the chassis noise - replaced the control arm bushings and stabilizer bar bushings. After cleaning the fuel injectors, fuel consumption dropped by 0.8L and the engine sound became smoother. I specifically requested a full fluid check: the power steering fluid was black and needed replacement, and the coolant with insufficient freezing point was also renewed. The most surprising discovery was water accumulation in the spare tire well, which also addressed potential rust issues in the sheet metal. Recommended additional checks for older cars: inspect whether the engine mounts have collapsed and check rubber hoses for cracks, as these aging components can affect driving quality.