How to unclog the rear sunroof drain hole when it's not visible?
2 Answers
Pour water into the sunroof and observe whether water flows out from the sunroof drain outlets near the two front wheels underneath the car. If water flows out, it indicates successful drain pipe unclogging. Use a syringe to flush the drain pipe, which can help clear the blockage in the pipe.
I enjoy tinkering with cars in my spare time. It's normal not to see the sunroof drain holes as they are hidden inside the roof. Last week, I unclogged them myself, and the process is actually quite simple. First, open the sunroof and locate the drain holes at the rear of the tracks, usually above the front seats. Use a thin wire or bicycle brake cable to gently probe inside, and if you feel resistance, twist it slightly to unclog. I recommend buying a specialized sunroof cleaning hose, which costs just over ten yuan and comes with a small brush head. The key is to combine it with a water test—slowly pour water from a bottle into the drain hole and observe the flow rate. If it's completely blocked, don’t force it; a visit to the repair shop for a quick blast with an air gun will fix it in seconds. To prevent clogs, pour half a cup of water down the drain holes monthly, and try not to park under trees, as fallen leaves easily block the pipes. Remember to use soft tools, as hard objects can puncture the rubber tubes.
