"Austin Shackles" <austinDITCHTHISFORBETTERRESULTS@[EMAIL PROTECTED]
> wrote in
message news:lvrl741g8sj34486b5bcpgh704ial7jigv@[EMAIL PROTECTED]
> On or around Sun, 13 Jul 2008 07:15:07 -0700 (PDT), macman
> <phootos@[EMAIL PROTECTED]
>
> enlightened us thusly:
>
>>Learned friends,
>>
>>I recently bought a 1998 Disco V8i fitted with twin LPG tanks under
>>the vehicle, replacing the original fuel tank. I have noticed after
>>not using the vehicle for several weeks my LPG tanks are now nearly
>>empty, so I guess I have a leak somewhere!
>>
>>The Disco has an LPG certificate dated 2001 which states that it is
>>fitted with 2x 40 litre tanks (water capacity). It also has a 30 litre
>>reserve type fuel tank.
>>
>>With no power to the LPG system the tanks should be closed by the
>>spring on the valves - right? So how come I can loose gas from both
>>tanks? Does only one tank have a valve maybe?
>>
>>I have lifted the fuel pump access plate in the back of the truck and
>>looked down, but am much not much wiser - looks cramped, so I guess
>>the whole cradle will need to be dropped down.
>>
>>Does anyone have an idea of how hard this is going to be to fix? I
>>have lots of experience with Land Rovers, but not much with LPG.
>>
>>Should I get this looked at by a specialist? If so anybody recommend
>>an honest company in the Bournemouth area?
>>
>>Also what parts would I need to order if I decide to do this repair
>>myself and does anyone have a diagram of how a twin tank system should
>>be fitted.
>>
>
> You're correct about "how the tanks should operate", i.e. spring-loaded
> valve should be shut when not energised. However, the valve could have
a
> fault. It'd have to be combined with a pipe leak as well though, since
> there are (should be) 2 more solenoid valves on the way to the engine.
>
> You need to work out whether it's 2 tanks, or a double-tank working as
> one.
>
> If the former, each tank should have its own valve, if it's properly
> installed. If it's 2 tanks made into a single unit with balance pipes,
> then
> it'll only have 1.
And most likely based on a 4-hole with the gubbins right at the back of
the
rear tank, tight to the chassis crossmember!
> Most likely leak location is in the fill pipe(s) in the scenario you
> describe. If you have 2 tanks, there will be a T piece in the fill pipe
> to
> feed both. The fill pipe may or may not have a valve where it enters
the
> tank. There should be an 80% fill valve inside the tank(s). There's
also
> normally a valve in the filler unit mounted on the body. I have however
> had
> minor leaks from filler pipes before.
>
> Get with some soapy water (or, better, proper gas-leak tester stuff) and
> look for bubbles...
I replaced a twin (2 tanks welded together with balance pipes) system
recently for a customer, exact same issue, a weld on the balance pipes had
failed and gone ****ous! When I looked into it, I discovered that this
particular tank setup (2 welded together) is no longer made for this very
reason - apparently a lot failed.
If it's a welded set-up, you'll probably have to get a cradle, 2 new
tanks,
2 multivalves, 1 contents sender, 8mm t-piece to split the filler feed,
6mm
non-return t-piece for the feed out and some 6mm and 8mm gas pipe, and
possibly a 8mm to JIC adaptor for the filler.
Badger.
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