james h
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| posted on 6/9/11 at 09:05 PM |
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Material for fuel sender gasket
While my car is off the road, I'm trying to do the jobs I never got around to before SVA, one of which is putting in my R1 fuel sender.
Originally, this would have been attached through the top of the R1 tank and really is a switch for a low level light.
1. Can anyone forsee any problems if I put it in the side of the tank?
2. I'm going to use rivnuts to hold the sender in the tank. Are there any compatibility issues with using steel rivnuts in an aluminium tank?
3. I need a small piece of gasket material if anybody has an offcut? It only needs to be about 1" by 2" in size. The integrated gasket on
the sender isn't thick enough to clear the flange on a rivnut.
The sender to be used:
 
R1 sender
Thanks
James
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BenB
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| posted on 6/9/11 at 10:02 PM |
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1. Just leaks
2. Yes, look up thermite 
3. Cork is popular for gaskets and fuel proof.
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Dingz
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| posted on 6/9/11 at 10:10 PM |
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quote:
1. Just leaks
Can you not fit it in the top? there may be a problem sealing the rivnuts too.
Viton rubber sheet will be fine, I should be able to find you a little bit.
Phoned the local ramblers club today, but the bloke who answered just
went on and on.
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Chippy
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| posted on 6/9/11 at 10:10 PM |
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You can get alluminium riv nuts, they should be compatable. HTH Ray
To make a car go faster, just add lightness. Colin Chapman - OR - fit a bigger engine. Chippy
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james h
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| posted on 6/9/11 at 11:05 PM |
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I've bought some aluminium rivnuts off eBay that should help the second issue.
I'd ideally put it in the top but its not long enough to give me the reading I'd want to have for a low fuel warning light.
The plan is to drill three holes - one for the sender unit to fit through, then two 6mm holes for the rivnuts. Over these holes I'd have the
gasket cut so it can be laid flush against the tank and with clearance for the rivnut flanges. It would look like a rectangle with the three holes as
above but bigger ones for the rivnut flanges, if that makes sense? I'd tighten the sender up against this.
Dingz, if you could find some for me that would be brilliant! Very much appreciated - I've just measured what I need, it'll be about
2.5" by 1.5". I'll u2u you.
Thanks for your help - as always this place is a fountain of knowledgeable people 
James
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steve m
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| posted on 7/9/11 at 07:44 AM |
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I have some cork gasket material, and can send it, if you pm your address to me
but, i wont be home till next tuesday,
steve
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BenB
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| posted on 7/9/11 at 07:58 AM |
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Are they blind (closed end) rivnuts? All the ones I've got are open ended which means the fuel will pee out between the rivnut thread and the
bolt thread if you put it on the side (unless you gunk it up with something gunky and fuelproof)....
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BenB
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| posted on 7/9/11 at 07:59 AM |
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If it's that the sender float arm isn't long enough, isn't it easier to just easier to extend the float arm? It's not as if
there's much force going through it...
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mcerd1
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| posted on 7/9/11 at 08:27 AM |
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quote:
Originally posted by BenB
2. Yes, look up thermite
that's a bit extreme - I don't think you'll suffer from that 
but you will get corrosion between the dissimilar metals (look up 'galvanic corrosion' )
basically the aluminium will sacrificially corrode around the steel - leaving you with a steel rivnut in a pile of white powder (aluminium oxide)
aluminium doesn't like stainless steel much either and any salt just makes things even worse
[Edited on 7/9/2011 by mcerd1]
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