[Diy_efi] fuel tank fittings

[Ernest Buckler]

Gents, Bill, Clair,
May I suggest that grabbing a plastic tank or two or three from a salvage 
yard should give you plenty of material to cut and glue and drill and tap 
and experiment with?  Perhaps these techniques ARE known somewhere on the 
planet, but maybe for here and now the best thing would be to break new 
ground and figure out what works and what doesn't?  Talk to some hi-tech 
adhesive people, tell them what you're doing, go with their recco?   Just a 
thought.   BTW, why NOT use a standard fuel-filler flex pipe?  No reason I 
can see for insisting that it be rigid plastic all the way to the cap - or 
did I miss a requirement somewhere?    [:oj
Ernest






----- Original Message ----- 
From: "Bill Washington" <bill.washington at nec.com.au>
To: <diy_efi at diy-efi.org>
Sent: Tuesday, August 28, 2007 5:01 PM
Subject: [Diy_efi] Re: Diy_efi Digest, Vol 30, Issue 9


> Clair,
>    In adding any fittings to the fuel tank the most important thing is ya 
> just gotta have a perfect seal!
> ... Obvious I know, but fuel tanks, lines and couplings I am very wary of 
> and careful with! ... fuel leaks are no laughing matter, be careful!
> I would tend as far as possible to use a "belt and braces" approach to any 
> such mods, and not rely on a single sealing method .....
>
> Regards
> Bill
>>
>>
>> Hmm... interesting.  I hadn't really thought about bending the plastic 
>> pipe,
>> just using it for the straight runs with formed
>> rubber/silicone/neoprene/whatever hose bits to make the turns.  That 
>> might
>> give me some options on how to handle things, though.
>>
>> With regard to the brass or polyethylene fittings, should I tap threads 
>> in
>> to the tank before installing, or will the fittings cut their own threads
>> and seal better that way?  I can see how the brass MIGHT cut it's own
>> threads, but I'm guessing the poly fittings need threads to even start. 
>> I'm
>> guessing the pipe thread will be sufficient in sealing itself, correct?
>> Would it be possible, or even necessary, to do a bit of plastic welding 
>> on
>> the poly fitting to make it that much of a tighter fit?
>>
>> Thanks for the ideas, folks...
>>
>> Clair
>>
>>   man/listinfo/diy_efi
>>
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