4200 Rear screen replacement

[CatmanV2]

The screens are supplied with the seal attached I believe

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[Masera]

has it had a screen change before?... must screen rust is a result of scratches caused by poor removal of the old one and the sealants

I am not the original owner so I am not sure. I certainly haven't change it. But when doing some work in the battery area, I did find pieces of glass. So unfortunately I do think it was changed and as you say, it looks like it suffered poor removal and/or install.

 

[Matt82]

The screens are supplied with the seal attached I believe

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Yes, looks that way. It’s what led me to buying another screen, with a ‘good’ rubber. Perhaps Maserati bonded the inner edge of the rubber to the screens to make a unit, then bonded the lot to the body later?
I have now pulled the screen out from the rubber around most of the perimeter and there is only bonding on the inner face where it sits on the body, nothing in the groove of the rubber!

 

[TimR]

yeah- not bonded to the screen from Modena, but ends up that way from sealant migration as it is fitted , that’ was my conclusion, based on side glass experience. The amount of sealant used left to right differed substantially. Not like it gets measured out and “painted on “ to exacting standards by robots...

 

[Spartacus]

Whilst I was changing the heater matrix on the 4200 and had the carpets etc. out, I noticed that rear footwells and boot filled up with water after I’d cleaned the car. Upon investigation, and removal of the rear seats and parcel shelf, it became obvious that the rear screen bonding was the culprit. The rubber seal was also very perished.

I managed to find a second hand rear screen with a serviceable rubber seal and took it to the local National Windscreens workshop for them to swap the screens and bond the new one in.

Unfortunately, the previously applied bonding over lapped onto the rubber seal (on both existing and newly acquired screens), meaning that the bonding couldn’t be cleaned off without destroying the rubbers!

The very helpful fitter suggested that he thought they may have a universal seal that would fit the profile and would I like him to give it a go.
Pictures below of the result, I’m happy, screen rebonded so no leaks and I think the rubber looks decent, only slight compromise is that the rubber lip onto the glass is a bit smaller, so it doesn’t cover some imperfections that the original did. But if I didn’t know this I probably wouldn’t notice.

£108 all in

View attachment 83376View attachment 83377

It seems to have a groove for a chrome trim , this was nt the same as the original was it ?

 

[Spartacus]

Whilst I was changing the heater matrix on the 4200 and had the carpets etc. out, I noticed that rear footwells and boot filled up with water after I’d cleaned the car. Upon investigation, and removal of the rear seats and parcel shelf, it became obvious that the rear screen bonding was the culprit. The rubber seal was also very perished.

I managed to find a second hand rear screen with a serviceable rubber seal and took it to the local National Windscreens workshop for them to swap the screens and bond the new one in.

Unfortunately, the previously applied bonding over lapped onto the rubber seal (on both existing and newly acquired screens), meaning that the bonding couldn’t be cleaned off without destroying the rubbers!

The very helpful fitter suggested that he thought they may have a universal seal that would fit the profile and would I like him to give it a go.
Pictures below of the result, I’m happy, screen rebonded so no leaks and I think the rubber looks decent, only slight compromise is that the rubber lip onto the glass is a bit smaller, so it doesn’t cover some imperfections that the original did. But if I didn’t know this I probably wouldn’t notice.

£108 all in

View attachment 83376View attachment 83377

Iv'e just spoken to National Windscreens in Southampton and they have quotes me £350 + Vat to change the rear screen on my Gransport . He said that they have to take the interior panels out to do it ? Is that what they did to yours ?

 

[Gp79]

Iv'e just spoken to National Windscreens in Southampton and they have quotes me £350 + Vat to change the rear screen on my Gransport . He said that they have to take the interior panels out to do it ? Is that what they did to yours ?

He’s not been on here for a while so might struggle to get an answer on that.
Interior panels come out quite easy

 

[Zep]

Tim messaged me back in November to ask the same question. I’ve had issues with the adhesive getting into interior panels when I had a screen replaced on another car, so told him I’d be taking them out.