Rosco
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| posted on 20/6/08 at 04:30 PM |
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Sealing for Fuel tank
I made the stupid mistake of cutting the hole in my fuel tank (for the gauge sender) in the wrong place and, although the sender is now in the right
place, I'm faced with an unwanted hole in the tank.
It's a plastic tank, and I tried using the piece of platic cut from the correct hole, which was slightly bigger then the first hole, and sealing
it on with SikkaFlex. This looked like it would do the job until I filled the tank with fuel when it started to lift off. I assume the fuel vapour
has attached the sealant.
So my question is how to seal the hole permenantly without needing to replace the tank. The hole is in the top of the tank on a Fury so will not be
accessable when the body is fitted.
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stevebubs
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| posted on 20/6/08 at 04:43 PM |
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Make an oversive cover out of suitable material (same sort of material as the tank, aluminium, etc).
Drill some bolt holes around the outside.
Put some rivnuts in
Bolt on cover using a suitable gasket to seal between the 2 items.
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DutchBoy
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| posted on 20/6/08 at 04:44 PM |
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well you deff need a good sealant...
i thought window glue/sealent is good enough....
Db
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stevebubs
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| posted on 20/6/08 at 04:44 PM |
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You could also try using a soldering iron to weld the 2 pieces together...
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andyharding
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| posted on 20/6/08 at 04:53 PM |
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Are you sure you haven't got one of the infamous leaky plastic tanks that will need replacing anyway?
Are you a Mac user or a retard?
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pewe
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| posted on 20/6/08 at 06:06 PM |
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Obvious to say it but... don't put any naked flames anywhere near the tank or the hole. Use an electric soldering iron if you must but if it was
me I'd be looking for a mechanical fix.
BTW my local (proper) accessory shop stocks cork composite sheets which make good gaskets for just your type of application.
Cheers, Pewe 
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owelly
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| posted on 20/6/08 at 06:39 PM |
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I have a plastic tank in my boat and the unused holes in the top are just covered with some thicker plastic, cork gasket held on with stainless self
tappers.
http://www.ppcmag.co.uk
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richard thomas
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| posted on 20/6/08 at 06:52 PM |
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Buy some Blue Hylomar.
Make a circular plate to cover the hole (alloy plate will do), rivet it on with at least 6 equally pitched holes, and assemble with Hylomar. Dip the
rivets in Hylomar before you insert them. Use the softest ally rivets you can find so they actually form inside the tank and don't just stretch
the tank material as they form, and end up pulling through....
Cheers,
Rich.
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:{THC}:YosamiteSam
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| posted on 3/7/08 at 10:03 PM |
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stop!!!!!!!!
you need to use 3mm ally plate as a cover over the hole - allow an inch overlap and bolt thro with ally rivnuts
use ONLY 3mm nitrile rubber sheet right across the hole IE the exact same shape as the cover plate with no hole in the middle just the holes
for the bolts
put bolts every 1 1/2" - use 6mm bolts in stainless
do em up tight and make sure the mating sealing face is clean, not scored etc..
there is no permanent mastic type stuff - been there trying to seal my inspection cover up - worked wonders when i went to a gasket manufacturer -
they told me the ONLY way to do it
petrol will dissolve hylomar eventually and PU adhesive
dont use thinner ally cos it will distort as you tighten down tight
take care with the hole drilling not to slip or to oval the holes and remove ALL burrs from the top face
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