Refreshing butyl sealeant hood to body frame Z3 help needed

Dino D

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British Zeds
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So after some help from those of you that have done this. I need to remove the sealing frame and refresh the butyl sealant.

I've found this fantastic blog detailing the procedure to remove and refit an entire hood and he deals with the sealing frame bit (I just need to do the frame seal): https://webspace.ringling.edu/~dplassma/str/str.html

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In this blog he says the frame broke upon removal as it gets brittle and needs to be flexed to come out.

Anyone on here done this and how has your experience been - anyone just loosened it to refresh the butyl seal?

Also wondering if the when those who have had new soft tops do they do any thing with this frame?
 

Dino D

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2.8 Manual

Jjim

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1.9 Roadster
Did this removal and reinstall about a month ago. Took the entire roof and mechanism off and installed another.

Bit of a pain but a good job to do on a nice day.

Main thing to know about when removing the roof from the body is there are 2 weather strips held together with the glue.
When you remove the gold colour hex bolts only remove the ones that go through both weather strips and leave in the ones that hold only the body weather strip (about 1 every 4 bolts). These are easily identifiable when your looking at them. As the weather strip on the roof indents around the back strip so you can see which bolts only hold the body weather strip in.

Once you have removed all the hex bolts and plethora of other screws, I then sat on the drivers seat with legs out the door and used my shoulder to push the roof up, slowly but with force. The weather strips then start to separate. This is when you really need a helper to then hold the roof in place as you then do the same on the other side. Once you have loosened the roof on both sides, lift the roof at an angle (one person holding the roof on either side). Pull the roof in an upward angle away from the boot. The rubber glue will start to separate.

Once you have removed the roof you will need to remove the glue from both the roof and body weather strip before applying a new glue. The old one will peel off Luke bluetac but a bit harder. It also gets warm under manipulation.

Hope the info helps. If you want any more info let me know.
 

bluesaz3

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Australian Zeds
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south australia
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3 2.8
Hi replaced the soft top last week went from black to blue .Looked at a few y tube videos that tended to go on a bit and missed a few pertinent points . The original seal seams to be a butyl mastic as you say and although mine was very sticky, it still pull away quite cleanly like blue tack as suggested.
You could try to gently heat it up with a hair drier or cut or scrape away with a putty knife or similar tool.
I used a panel trim removal tool to pry the hood hop from the rear plastic trim seal carrier.
The old sealer seems to have been a tape, like a dry glazing tape ,how ever i managed to find SIKA BLACKSEAL BT in a cartridge type tube and this seems to have very similar quality's being bulty based product and cost me $10 aus about 6uk .
The reason i say the old was a tape it had a regular size and even thickness and in some of the y tube videos used a 3m tape.And in compression seems to maintain a even thickness.

IF you think the product i suggested is for you please be very careful in its use ensure you Masking tape any areas you do not wish to get any on like the canvas its self.although can be removed from paint work with turps or white spirit but not the top.
I warped my car in cling wrap after cleaning so not to mark the rear of the car ,cheap and effective.
When using the blackseal cut and flattened the nozzle so to get a tape like shape of the blackseal from the tube on application.
Practice on a bit of cardboard.
Once the bead was on the hood i left it well alone over night to reduce the tackiness of the bead of product left on the surface .
The points i would suggest you pay attention to are.
Not all the screws are the same length.
Feed the hood and rail into position from the back towards the front being the doors and push the rear down into position best with 2 people
The back plastic rail has spacer washers on it that can move, and become a real pain on reassembly .
Place all fixing back in the right holes but do not fully tighten until you are sure the edges of the top have the right alignment and gap in relation to the doors,you will know when you look at the door edge!
You can do this by using sir- clip pliers to move the hood frame backwards or forward using the bolt as a fixed lever point ,the hole in the rail is elongated and if you stick the pliers against the bolt and hole edge you can move back or forward and saves a lot of frustration.Once in place tighten the front hood bolts up first doing one side at a time and the work back doing one left one right or visa versa until you you have finished the bolt up.
When i replaced the hood i used 316 stainless steel staples in the hood rail .however would think if pushed you could use just steel ones because the sealing bead should cover the line of staples and most likely not to corrode if sealed correctly.
The bead of blackseal i tried to maintain a even bead of about 6<8mm thickness and 12<15mm wide and on compression will spread and fill the gaps hopefully.
The rear plastic bit acts as a gutter and directs the water to the drain holes near the door pillar if you broke this on removal i would recommend a replacement one because once broken would not function correctly and drain all the water away fully

Hope this helps and wish you well with it .Cheers.
Mick
 

Jjim

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I didn't use tape I used a non-silicone based sealant.
 

Dino D

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I didn't use tape I used a non-silicone based sealant.
That might be easier to work with than tape in terms of positioning it all I guess (but possibly messier if it all goes wrong!) Do you remember which one?
 

Dino D

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@Dino D I would say they would have to ? never thought of it.

Give them a call, nice people.... Monsoon Hoods 01323 440422

Sean
Had a chat with them and yes they refresh this, not had a frame break before so encouraging. Can't do a new hood now though..would be much easier though!
 

Jjim

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bluesaz3

Dedicated Member
Australian Zeds
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Aug 1, 2017
Points
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south australia
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3 2.8
Wasn't that messy actually. Used about just over half the tube.

http://www.screwfix.com/p/nemesis-mighty-frame-glazing-sealant-black-290ml/3534j

Forms an elastic rubber seal
Hi again when looking for sealant also found some cool room panel sealant which was white and non hardening this also was butly based .

Do not be put off by the sealant going all over just ,take precautions to prevent it from sticking to any unwanted surface by masking all the surrounding areas with the blue painters tape, especially the canvas.
If you do get any on the canvas do not panic and wipe it of, you will press it into the top further but try to pick it off with out pressing it in

Cheers .
Mick
 

Lee

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Last edited:

Dino D

Zorg Guru (V)
British Zeds
Joined
Mar 28, 2014
Points
176
Location
Kent
Model of Z
2.8 Manual

Dino D

Zorg Guru (V)
British Zeds
Joined
Mar 28, 2014
Points
176
Location
Kent
Model of Z
2.8 Manual
Done a few of these myself now mate. Quite a straight forward job. The butyl sealant I use comes on a roll so you cant mess it up, long as you run two lengths to each gutter.

http://www.ebay.co.uk/itm/HIGH-PERF...699393?hash=item2a767053c1:g:3roAAOSwEzxYQuB1

I must of done about 6 now. Cant get it wrong with this stuff.

Lee
@TaffZee was this the sort of stuff you put into the part where the hood fabric connects to the frame? (I think you split the frame and refreshed the part where the hood fabric is joined to the frame in addition to the frame to body join).
 

Lee

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British Zeds
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I'd prefer to use tape.
I'm guessing 2 rolls to cover it?
I'm only on my second roll and I've done 6 cars. You don't have to run two lengths but I did to be sure. I just made sure it overlapped the gutters at each end and I've never had a leak.
 
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