Do domestic cars have cavity wax injection?
2 Answers
Domestic car brands such as BYD, Volkswagen, and Chery utilize automotive cavity wax injection technology. Below is a detailed introduction about automotive cavity wax injection: 1. Overview: Cavity wax injection involves injecting a certain amount of liquid wax into the four cavities at the bottom of the car body. Through specific processing techniques, the wax remaining inside the car body cavities forms a uniform protective wax film, preventing water droplets from entering and ensuring excellent anti-corrosion performance for the entire vehicle. 2. Technology: When manufacturing components with cavities, injection holes are usually pre-designed. (After professional design, wax injection is typically performed directly through some threaded holes and weight reduction holes, without the need for dedicated wax injection holes.) Some enclosed areas may have holes opened to facilitate the outflow of liquid wax during the wax draining process in the wax draining room.
I'm an automotive enthusiast who often delves into the technical details of domestic cars. Cavity wax injection sounds highly specialized, but it essentially refers to the process of injecting anti-rust wax into the hollow cavities of a vehicle's body during manufacturing to prevent internal corrosion. This technique is becoming increasingly common among domestic models, with premium versions like the Geely Xingrui and Great Wall Haval series adopting it. I've seen demonstrations at auto shows where the molten wax is injected at high temperatures and solidifies to form a protective layer, extending the vehicle's lifespan—especially crucial in humid or high-salt environments. Don't assume only imported cars feature this; domestic brands are prioritizing quality upgrades, and most mid-to-high-end models now include this process, though budget vehicles might omit it. It's difficult for owners to inspect this themselves, so I recommend checking the vehicle manual or confirming with a 4S dealership. Pay attention to this feature when purchasing—good rustproofing means your car can maintain excellent condition even after a decade, making it a worthwhile investment.
