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MG MG Y Type - Sunroof rear rubber seal

Hi Everyone
I know there is a seal in the trough at the front of the sunroof but is there a rubber seal on top of the roof in the rear recess ?
I think I have read somewhere that there is, but if so where exactly does it fit? And how big is it ?
Any thoughts gentlemen?


Cheers John B
J K Bowman

There is a trough at the rear of the sliding roof John. The rear seal sits in here. Rear seals are available from NTG.

Paul Barrow

Thanks Paul , I've just found it in their catalogue, no picture though and the trough is in shadow in your photograph.
Does the seal fill the trough or is it a square seal against the front or back edge of the trough ? Asking because I have some sealing strips left from other projects which look possibles .
While you are looking at the sunroof what are the dimensions of the strip held onto the back edge by bifurcated rivets,the lining tacks into it .
Thanks John
J K Bowman

Hi
if you have done it .,please make a picture
i have the seals, but dont know when i will do it
a lot of work before
FT Franz

Dont have any photos from when I installed it in Y 5270 and to be honest it was several years ago now. This is a spare roof I have. Neither can I remember the dimensions.

To be honest since you are in the UK I would just order NTGs part and fit that.
Paul Barrow

Hi John,
It helps if you understand how the seal works and where it needs to be positioned.

If you look inside the roof cavity where the sunroof lives when it is home, you will see a rounded strip that runs across the underside of the roof panel skin. When you turn the handle to lock the roof it lifts the rear edge of the sunroof up, it is this rounded strip that pushes into the rubber to seal on the sunroof panel against wind & rain.

If you measure the location of the strip from the front of the opening & transfer that to the roof panel, you can align the seal perfectly.

I might have a sample of the sunroof seal - need to look ?.

I have also fitted a 1/8" thick "weather strip" along the front edge of my sunroof to stop water/drafts there and provide a soft landing when I slide to sunroof forward.

Safety Fast

Tony
A L SLATTERY

Thanks Tony ,had a look today. From what you say it seems the seal does not fill the trough at the top rear of the sunroof but needs to be positioned carefully. The reason I would like to see a seal is because I have some seal strip which may do the job.
Your idea for protecting the front edge reminded me of the original seal I removed many years ago, and I think it was an L shaped section . The base of the L was quite thick and the vertical was thinner. I removed the seal when the drain channel rotted away.
Cheers John B

J K Bowman

Hi All,
The 26mm wide x 6mm thick sponge rubber
seal is set in from rear flange of sunshine roof by 6mm. also the seal has a fin 6mm high sticking up from the main seal it is set back from the edge of the seal by 6mm. It is part ot the seal not added after. i have other photos if required by anyone.
John YB0362




JC Jebb

2 more for you all. this seal is original fitted by factory
John YB0362




JC Jebb

That's spot on John just what I needed to know. None of my spare seals will fit so I need to order it from NTG as Paul suggested , and you've given me its exact fitting place . Thank you
While you have the roof handy could you measure the tacking strip on the back edge please? I am guessing its about 1/4" thick but i wondered how wide it is ?
Thanks a lot
John B Y4424

Tony the L shaped seal I mentioned in my last post was at the front so the upright of the L formed the shock absorber.
Cheers John
J K Bowman

Hi John,
The strip is 12mm x 5mm.
John YB0362
JC Jebb

John B,
Can you ring me anytime, phone no in for sale col,
i have an idea you might like.
John YB0362
JC Jebb

Thanks for the photos and info John ,its a big help.
Will ring you as soon as I can.
Cheers John B Y4424
J K Bowman

Reactivating: I know that LTBYs refers to the rear sunroof seal as having a raised rib, and John Jebb's comment plus excellent photo of original seal (above, esp. 4th photo with hydrangea?) confirms this. I did not know that, per Tony S above, the rear seal actually locates against the round transverse strip to lock out wind and rain.
Question then: none of the "Rear seal, sunroof" products currently offered by the usual merchants seem to have the raised rib - they are just flat sponge material (I hesitate to say rubber). I have a new one ready to install, and I think, from Tony's description, it will probably do the job. But before I take the plunge and fit the sunroof, does anyone know how important the raised rib is ?? I only want to do this once!
John.
J P Hall

Hi John,
I am currently fighting my sunroof for supremacy ,nothing to do with the rear seal.
I followed Tony and Pauls advice and ordered from NTG.
The seal pretty well fills the trough at the rear of the roof panel and when closed it seals against the underside of the roof .The ridge which is mentioned simply beds into it, nice and snug .
Cheers John B Y4424
J K Bowman

Just to add to this I have done a bit of measuring whilst attempting to sort my own sunroof.
The little ridge of steel which hangs down from under the main roof at the rear of the opening I thought lined up with the seal . In fact it is behind the closed sunroof . The weather seal is achieved by the little vertical ridge on the original seal.
However I think the NTG seal will make an adequate seal anyway .
To end my saga here it would seem that my sunroof panel has developed a deeper curve during its period being bead blasted and stored which was why it is catching under the roof and sitting proud in the middle when closed .So just need to flatten it a touch then -he says hopefully .
Onward and upward John B Y4424
J K Bowman

John,

Your pics of the orig seal are invaluable.

The rectangular rubber seal I purchased for this application from NTG was totlally useless. It left a LARGE gap between the sunroof panel and body.

I subsequently purchashed several "D" shaped hollow rubber tubing extrusions[Sorry, no UK or OZ equivalent contacts] in 1/4". 3/8" and 1/2" sizes.
I bonded the flat side of the proper one to the NTG rectangular section with cyanoacrylic glue and now have a watertight seal across the width of the panel.

Rocky
YB0952
Rodney C "Rocky" von Dullen

Rocky - my concern exactly. It's hard to achieve a good photo, but I hope you can see the step *down* (actually about 7mm )from the green metal of the sunroof on the right, to my new grey foam rubber seal, and then the fawn of the headlining edge on the left. In other words, the so-called sunroof rear seal sits *below* the top of the sunroof - and even though the rounded lip under the roof that Tony referred to no doubt helps, I just can't see that without the ridge or "lip" that was on the original design, I'm going to get a good snug seal. I have two options - add a second foam seal on top of the one in the photo; or do something like you did, adding d-shaped extrusions to do the job of the original "lip" on the seal. It worries me that a product is being sold which bears only a passing resemblance to the structure and function of the original.
Hope this helps!
John.



J P Hall

This thread was discussed between 16/12/2020 and 13/03/2022

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