How to clean drainage hose on passenger side in Renault Scenic?

Answer 1

If you mean the drainage hose for the sunroof then it's quite easy.

They are normally clogged with silt I have a megane scenic the hose comes out behind the splash guards for the front wheels. The guard is secured with 3 screws to the rear you don't need to completely remove it just pull it far enough back to work.

If you're not sure where your pipes come out pour a little water carefully into the drainage channel on the side that isn't blocked then look under the car to see where it comes out/drips down and trace it back until you find the end of your drainage tube.

So to clear it out you need something flexible and strong enough to push the silt out but thin enough to fit down the tube without damaging it!

I used an old wire securing spring from an Ironing board cover. You could use a length of net curtain "rod" (the old fashioned type- flexible spring covered in plastic) or you could try a drain clearing rod from your local pound store/diy store. Whatever you use it needs to be long enough to go through the full lenght of the tube(obviously) about 2meters should do it.

So carefully feed the spring down the pipe through the top of the open sunroof, don't scratch the paint.

If it gets stuck pull back gently then try to continue. If it doesn't want to go try turning the spring as you feed it in or pouring a little hot water down the pipe.

When you think you are all the way through look under the car and check it's all the way through and either pull your spring all the way through or back out the top.

Lastly pour a little hot water down to flush it out.

hope that helps.