How to repair a broken sunroof drain pipe on a Haval H2?
2 Answers
Connect a syringe to an infusion tube to extract accumulated water from the drainage channel, preventing backflow caused by forced injection. After removing the water, fill the syringe with clean water, align the infusion tube outlet with the drain pipe inlet, and control the pushing force based on resistance until water overflows. Use suction to extract the sewage mixture, repeating several times to unclog the drain pipe.
I also encountered the issue of a broken sunroof drain pipe on my Haval H2. The repair isn't actually too difficult, the key is to be careful with the hands-on work. First, you need to confirm if it's truly broken—pour some water into the sunroof drain hole and see if it leaks out from under the car or flows into the interior. If it's broken, buy a new OEM drain pipe from an auto parts store, making sure the model number is correct. Be cautious during disassembly: gently pry open the sunroof trim panel, usually requiring a screwdriver to remove a few screws—don't pull too hard to avoid damaging the interior. After removing the old pipe, align the new one with the sunroof outlet and the drain hole at the bottom of the car, ensuring there are no folds or gaps, otherwise leaks could damage electronics. Once installed, test by pouring water again—if there's no leak, you're done. I recommend cleaning the sunroof tracks and drain holes while you're at it. Use compressed air to blow them out every six months to prevent clogs that could stress and break the pipe. The whole DIY process took me two hours, and the materials cost just a few dozen yuan, saving a lot of money—just be careful not to hurt your hands. After the repair, I haven't had any issues since.
