Rear sunroof

I have been trying to dry out my 1995 Discovery and have a question regarding the rear sunroof drainage.

The other week when we had those torrential rains I noticed for the first time the roof lining at the top of the windcsreen on the passenger side was soaked.

Now, the other week I found some holes in my guttering on the passenger side and presumed that was the source of my damp passenger footwell carpet. That was cleaned and filled weeks ago so should be ok.

When the rain stopped I decided to check the drain holes. The front sunroof was fine. both sides the water dribbled out the holes on the sill in front of the doors.

The rear was a different matter. Tipped a little water down each side, got on my hands and knees to check where it drained to and nothing. Ony a dry floor.

Then I noticed some water on my rear side window seal at the top, so the water has dribbled inside.

Where should the drain holes send the water? what am I looking for outside?

Is there a method to clear the drain holes?

I dont want to seal up the electric roof as my kids will be with me in the summer and I am sure a rear sunroof will be used a lot.

Thanks in advance.

The rear drain tubes exit behind the rear valance to the rear of the mud flaps you may need a torch to look up and see the tip of the tube. An air line will blow them clear.

Hope that helps you.

That sure does, cheers.

go steady on the air pressure if you blow the joints apart, its the headlineing down to fix it

Is it best to put the air pressure from the bottom of the drain?

(Had to word that very carefully )

Would not like to say never done it, i took head lineing down, mine were already apart, but i know of some one blowing them apart he did addmit to around 100 psi not good

Brian S said:

Is it best to put the air pressure from the bottom of the drain?

(Had to word that very carefully )

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Double edged sword there. IF the drain pipes are disconnected from the sunroof, or broke it will fill the headlining up with all the crap that might be in the pipes. However, the other end is if you blow straight into the headlining from the sunroof drain, it could damage the cardboardy contruction of the headlining. In the old days, you could shove a thin wire down the drain hole in the sunroof and see where it come out of. Given the length of the drain pipe, it'd take one hell if a bit of wire!

It's much easier to access the rear sunroof drain pipes by taking off the rear light clusters on each corner post. Once off, the drain pipes can be brought out through the holes and dealt with.

The rear lights would need the rear seats removing again to get to the bolts so I will treat that as a last resort. I do have some solid electrical wire which should be long enough. I'll carefully try that first.

Just been thinking about this a bit more, does the fact the water ended up behind the headlining mean that the pipe may have come off the drain at the top? maybe perished?

Brian S said:

Just been thinking about this a bit more, does the fact the water ended up behind the headlining mean that the pipe may have come off the drain at the top? maybe perished?

Click to expand...

Depends. Did you actually force the water down the drain holes or just flood the sunroof? If you just flood it, it will escape wherever it can! If you poured it down the drain hole, it would indicate that the pipe disconnected!

The pipes could well have come off. Or the drainpipes could be blocked and any water backing up.
Could also be the case that the water is leaking in between the glass and the rubber seal and draining down to the headlining.
The original drain pipes are pvc and not liable to rotting.
If it was me I'd explore the glass/ seal option first, common problem.

I only poured a little water into the corners, the same as I did for the front. The roof was open and I did not get any overflowing into the opening.