How to Open the Drain Holes on the Car Chassis?

[DiPenelope]

There are many drainage holes in the vehicle, and the chassis is no exception. To open them, simply use a pry bar. Alternatively, you can use your hands to pry out the rubber plug to open the waterproof hole on the chassis. However, the drainage holes on both sides of the chassis should not be left open for long periods.

[Drew]

Actually, there's no need to deliberately open the drainage holes under the car as they naturally drain water during normal use. However, if you need to inspect them, first find a level surface, engage the parking brake, and securely support the vehicle with a jack before crawling underneath. These holes are typically hidden along the door sills, near the fuel filler cap, or in the corners of the trunk drainage channels – you'll need a flashlight to locate them carefully. Rubber plugs can be removed by pulling their edges, while plastic covers may require gently prying with a flathead screwdriver. After draining accumulated water, use thin wire to clear out any sediment, and crucially, remember to firmly press the waterproof plug back into place. As a reminder, never attempt this on a slope – I once saw someone using an emergency jack on an incline and it nearly caused a serious accident.

[MacRuby]

I've noticed many people overlook these details: lifting the rubber seal at the bottom edge of car doors reveals drainage outlets, and opening the fuel filler cap exposes water drainage channels. Most drain holes come with soft rubber plugs that can be pried open with a fingernail. Some vehicles, like older Accord models, are particularly prone to clogged trunk drainage channels – I've seen enough standing water to raise fish in them! When cleaning, I prefer wearing rubber gloves: first removing sludge, then power-washing from inside outward. But be warned – those plastic drainage components are brittle. Last time, a friend forced one open and cracked it, ending up replacing the entire drainage channel assembly at a cost over 300 RMB. Truth is, simply flushing them quarterly with a water bottle prevents clogs entirely.

[EdenAnn]

Based on my experience handling hundreds of vehicles: Japanese cars typically have drainage holes near the inner wheel arches, while German cars concentrate them in chassis grooves. SUV drainage points are usually positioned higher than sedans, often found under the spare tire cover panel. Never force open rusted drainage holes—first spray WD-40 into the gaps and let it soak for ten minutes. If you notice missing seam sealant, reapply it promptly to prevent water leakage into the frame, which causes more severe damage. Before rainy seasons, always inspect the sunroof's four-corner drainage tubes—clogs here cause water to flow down A-pillars onto floor mats. Last time I helped clean one, we extracted two buckets of water from the floor, and the seat foam had even grown mold.