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.
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...
--
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