Heh all.
I'm getting to the end of my tether with my front sunroof.
In September of last year I started getting a pretty big leak from the area where the sunroof switches are so I paid a local sunroof/car upholstery place to diagnose and repair, then put in some sound dampening and repair the headliner at the same time.
Diagnosis was the usual blocked drain tubes. They did that, but the problem reoccurred the very next time it rained. Next time round the shop replaced the sunroof seal, assuming that too much water was getting past the seal and overwhelming the drain tubes.
I just got the truck back yesterday and of course it's leaking as badly as ever. I can instantly reproduce the problem if it's been raining and I brake for a right hand turn that's fairly sharp.
Doing the above, results in a wet drivers leg and a good amount of water dripping onto my brand new NEX 8000 head unit. I'm not a happy camper!


Any ideas on how to proceed with fault diagnosis? One last point, with the headliner out, and the water shower sprinkler at the sunroof shop on my truck, they were never able to make it leak, so this appears to be tied to the movement of water during change of direction.

 

One last thing, I've managed to capture a video of the problem that I can upload for folks to look at.
What else could be the problem? Roof rail seals?, windscreen seal ?

 

I gave up on using the stupid sun roof and put clear duct tape all around the perimeter. Ugly, but stopped the leak. Since the car is so tall it is barely noticeable.

 

All LR's are prone to sunroof leaks as they age even the LR3's and 4's. There are two major problems and both require removing the sunroof frame to fix correctly. The rubber and mastic seal between the metal roof shell breaks down is one common fault and the other is the rubbish plastic drain tube cups. There is a fix in an article on page 182 of April 2014 Land Rover Monthly. I've posted this before here if you search the forum. Neither fix is easy and both require removing the headliner to fix correctly. It's a PITA task and takes a full 8 hour day and care to achieve with 2 sunroofs and maybe even longer with rear aircon. The other 'bodge' up answer is to mastic the whole lot up on the exterior roof area but it doesn't look pretty and means the sunroof(s) cannot be used.

 

Thanks for the info.
The headliner indeed has been out of the truck twice and the mastic seal between the roof and shell replaced on both roofs. The outer seal was also replaced.

To date, both sunroofs have also been removed from the truck for service. I have pretty major OCD and wanted correctly functioning factory roofs, otherwise i would have sealed them up.

The drain tubes were apparently checked and reported as working correctly (didn't see that myself to confirm).

Here's the thing though, with the headliner out and an overhead sprinkler on the truck in the headliner/trim shop, there was no water ingress into the car, ever!

I can only reproduce this while driving.

maybe the left side drain tube cup ?

grrrrrrr

 

I would definitely suspect the drain tube cup. When I did mine I found that the actual plastic material was not bonded to the mastic glue material at all. It was clipped in, but the silicone (or whatever it was) was not Stuck. I suspect the plastic cup is made of polyethylene, which is a plastic used in waste tubes. It is used cos nothing sticks to it! Not even paint.

The garage could easily have blown "up" the tubes to confirm they weren't blocked. Totally missing the sketchy seal.

I'll look for my sunroof fix thread, cos I took some decent pictures of the cup sealing problem.

I've been bone dry since.

Edit. Here ha go. At first I didn't think it was the sunroof. https://landroverforums.com/forum/di...st-leak-69754/

 

I believe that even with seals in 'acceptable/good' conditions, water will find its way in because drains only to forward corners of the sunroof, puddling towards the rear never making it to the drain pipes, spilling instead.
So park yours downhill or drive only downhill. And if you complain loud to LR engineers, won't make a difference anyway, as they drive other dry brands.

 

There is no such thing as a "dry brand" sunroof. Or at least not a sunroof that retracts anyways. I go into this assuming that they all leak, eventually.

Here's a video of mine in action.

https://www.youtube.com/watch?v=VNFa...ature=youtu.be

I checked your thread out. Hmmmm I don't think i'm leaking from the same spot. In fact my headliner is bone dry everywhere. I just have the leak that gets caught in the map pocket.

When your leak would drip a lot, where would it drip from ?

 

That's exactly where mine used to collect!

The headliner while it looks like a spongey permeable material, is actually waterproof. So the water gets in and has to decide where to collect or drip out. Usually at an edge. Sometimes tips it down the a pillar. Mine into the map pocket. Others have appeared near the seatbelt.

I still say if you haven't had eyes on those corner cups yourself then I would suspect them. Are you able to drop the front half of the headliner yourself and have a look? Took me about 30 mins.

 

The work is under warranty so I think i'll have the shop do it and watch them as they pull the headliner

Thanks for the heads up!

Robbie