What Parts Need Maintenance for Older Used Cars?
2 Answers
Older used cars require replacement of engine oil, air conditioning components, spark plugs, etc. Air Conditioning Cleaning: The evaporator and fan of a car's air conditioning system remain closed and in dark conditions for extended periods. Over time, they accumulate significant dirt, mold, fungi, etc. When the AC is turned on, most of these contaminants enter the cabin. This is particularly concerning for used cars, as it can adversely affect the health of both drivers and passengers. Therefore, after purchasing a used car, the first maintenance should include a thorough cleaning of the AC ducts and evaporator box. Spark Plug Inspection and Maintenance: Spark plugs have a service life of 15,000 kilometers. When a car reaches this mileage, carbon deposits form on the spark plugs, increasing engine fuel consumption and making starting difficult. After buying a used car, it's crucial to check the gap between electrodes and whether there's any leakage between the ceramic body and metal casing to prevent spark plug issues.
I've been repairing cars for half my life, and safety components are the most crucial when it comes to maintaining older used vehicles. Older cars are prone to issues, especially in the braking system—worn brake pads increase stopping distance, which is extremely dangerous; brake fluid with high moisture content and low boiling point also affects performance. Tires with aging cracks are prone to blowouts, particularly on highways. The suspension system should also be thoroughly inspected—worn shock absorbers make the car bumpy over potholes, and loose linkages can cause unstable steering. Oil leaks or unusual noises from the engine shouldn’t be ignored, as prolonged neglect may lead to major repairs; a leaking water pump in the cooling system can cause overheating and breakdowns, while a clogged radiator spells big trouble. Electrical issues like a weak battery causing failure to start or aging wiring leading to short circuits and fires are serious concerns. If you buy an older car, take it to a professional shop for a full diagnostic check first—make sure all safety components are in proper condition before hitting the road. You know, your life is more important than saving money.
