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Not sure which way to go on this one. I have a crack in windscreen wash water bottle on my 1983 Audi 80. I have had one go with some black flexible loctite we have at work but it is still leaking. I am in 2 minds 1 - Cut out the area around the crack and build the it back up with 2 pack epoxy or similar. Then shape etc 2 - Find a BIG soldering iron and use that to remelt the crack and then shape etc I could buy a replacement but the bottle is rare and getting one from germany would cost a fortune due to size The crack is the black line  A close up. Note the fracture at the bottom continues inside  |
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Rich
Club Retro Rides Member
Posts: 6,249 
Club RR Member Number: 160
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Windscreen water bottle repairRich
@foxmcintyre
Club Retro Rides Member 160
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Plastic weld it then seal it with something after to seal any pinhole leaks.
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Oct 23, 2016 11:49:31 GMT
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Soldering iron to weld it, wipe the tip 1st to get excess solder off it, the side of a round tip should be fine.
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Oct 23, 2016 12:02:25 GMT
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I assume that's the back where it locks int the metal bracket on the car?
Is there anything else in the VAG stable that uses the same bottle.
Perhaps an overall picture may help to see if there's a suitable clone?
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Needs a bigger hammer mate.......
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Oct 23, 2016 12:27:39 GMT
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Plastic welding would work but it can be quite in depth.
You would need to grind out the crack, then melt identical plastic back into the hole. When I've done it before, I've been able to find excess material from the piece I was welding.
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Oct 23, 2016 12:28:50 GMT
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What about some radweld and pressurise the bottle to force the sealant into the crack?
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Oct 23, 2016 12:46:23 GMT
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Plastex.
This stuff is amazing.
Grind out the crack, fill it with the plastic powder, add the liquid solvent and it disolves the powder to make a plastic that bonds to the surrounding plastic.
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Oct 23, 2016 12:49:21 GMT
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There are some plastics it wont bond to, these need stitching. Fair enough, but may not be water tight. Any markings you can look up to see what its made of? www.plastex.net/Product_Info.php |
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bortaf
Posted a lot
Posts: 4,549
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Oct 23, 2016 12:55:46 GMT
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if it's nylon it will be a PITA to get anything to stick to it IME have a read here, info.craftechind.com/blog/bid/323475/Stick-to-it-A-Guide-to-the-Best-Glue-for-PlasticMy ex is into dolls so she usually has something about the place to use on differant plastics, i often pop in and have a borrow to fix a dash or water take off, some plastics heat weld well some take hot glue well, you need to ID what plastic it is first, nothing is as easy as it first sounds lol  Sometimes i just use a soldering iron and the bit you cut off cable ties as a filler stick, dash clock screw tabs are what i mainly use that and for mainly older 70's dashes but it works on certain stat housings and rad end caps as well  For stronger bonds i use baking powder and super glue, pile on baking powder and add super glue till it's all soaked, let it dry and it's like a filler, learnt that from tested's utube channel (Adam savage) |
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Last Edit: Oct 23, 2016 13:01:40 GMT by bortaf
R.I.P photobucket
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Oct 23, 2016 14:09:22 GMT
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bracket looks similar to my polo....maybe post a pic of the tank
i think i would find something thats readily available for cheap and make a new bracket , wont look any worse than beads of expensive glues /sealer /melted bits , the pumps are almost universal so will fit
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91 golf g60, 89 golf 16v , 88 polo breadvan
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Oct 23, 2016 15:42:15 GMT
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Can you post up the part number stamped on it?
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Needs a bigger hammer mate.......
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Oct 23, 2016 16:24:18 GMT
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Thanks fopr all the replies
sausage - Would a std soldering iron be big enough? The plastic at this point is thick and has a inlay over the top by the looks. You can just make it out in the 1st photo.
Daggers - Yes it is the back. I would rather use the original if I can. There are std bottles but mine has an early headlight wash system. This tank is a monster. The std one is about a quarter of the size. I will post pic later along with the part number
Soopahfly + bortaf - Not a clue what the plastic is. Only markings are standard VAG, part number and a manufacture date - 6th month 1982 :-). Maybe cut up a std one or an equivelant from that era. I know where there are a couple of mk2 golfs in a scrapper.
ALL - Sounds like I need to find out what plastic it is. Then decide wether to weld using soldering iron or use a glue of some sort after grinding it out. How to find out. Off to read the links....
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Oct 23, 2016 16:35:01 GMT
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Oct 23, 2016 20:09:30 GMT
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91 golf g60, 89 golf 16v , 88 polo breadvan
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Oct 24, 2016 17:54:36 GMT
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Good suggestion If I change I will just use a std one. Slot straight in. Wiring already there etc. Will Have a go at glue option sometime this week |
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paul99
Part of things
Posts: 410
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Oct 28, 2016 12:39:49 GMT
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If you do see one on the German Ebay, there is someone who goes to Germany in an estate car, willing to transport stuff on the Pony Express page.....
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Oct 29, 2016 20:51:09 GMT
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Well got out the dremmel and gouged out the crack. Left a hole about 1.5 cm long and 5mm wide. Then filled with Loctite 'double bubble'. Its a 2 part epoxy resin. We had some at work :-)Had to put 2 packets on in 2 different applications. Filled it up with water yesterday and it seems to be holding. Not driven it yet so time will tell as the crack is right where the metal holder clamps to the bottle. As ever forgot to take some pics.
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barty
Posted a lot
Posts: 1,088
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Oct 30, 2016 16:57:31 GMT
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just noticed it has an integral pump or you could have just lined it with a plastic bag and filled the bag with water, no one would ever know but that will only work with a in-line pump
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Oct 30, 2016 19:39:30 GMT
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I did think about usig some sort of tanking liquid htought it would be hard to get right with the size and shape of the tank. Must admit plastic bag sounds easier :-)
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