Gas system removal

[Hobie18]

Hi folks

I have to remove a gas system thats fitted in place of the fuel tank in a 2 door rangie. I believe the system is still preasurised. Is there a safe way to empty the system or any things to be careful of.

Thanks Guy

[V8Patrol]

move the vehicle to an open area ( definately not a job for in the shed !! )

Disconect battery firstly.

extinguish fires/cigarettes/etc

remove ALL electrical tools appliances & leads this includes leadlights !!


Then open up the LPG tank "inspection cover", there is a tap in there...turn it to the OFF position and unplug any electrical wires.

back to the enginebay and disconect any electrical wires associated with the LPG system

use the correct "ring open ended spanner" and slowly crack the nut which holds the feed line to the lockout valve, the lockout valve should be near the converter. Once the gas starts to escape stop undoing the nut momentarilly to allow the gas in the line to depressurise, when the gas stops comming out undo the nut a bit more and check for further gas escaping...... repeat untill ALL gas has stopped escaping.

Done !

The lpg gas will drift down through the engine bay and be taken away on the breeze/air currents, if you do the system bleeding in the boot or in an enclosed like area the LPG will "sit" in the "well" and remain there for some time

Kingy

[MQ SWB]

you have a pm

[Hobie18]

Thanks Kingy

PM replied - MQ SWB

Kingy - Does the line from the filler cap to the tank also have a stop valve on it as this is bolted to the car from the outside or does the tank itself have a non return valve.

Does the process that you stated release the gas only from the lines from the tank to the engine bay leaving the gas in the tank.

Thanks
Guy

[RaginRover]

Thanks Kingy

PM replied - MQ SWB

Kingy - Does the line from the filler cap to the tank also have a stop valve on it as this is bolted to the car from the outside or does the tank itself have a non return valve.

Does the process that you stated release the gas only from the lines from the tank to the engine bay leaving the gas in the tank.

Thanks
Guy

Yes,

there will still be gas in the tank, the tanks have a manual tap and a solinoid that will keep it in there, i.e. you need to open the tap and the solinoid to get gas to come out. I would not recommend venting the tank
and trying to empty it - there is just too much gas in there for it to be safe.

Tom

[V8Patrol]

Does the line from the filler cap to the tank also have a stop valve on it as this is bolted to the car from the outside or does the tank itself have a non return valve.

Exact same process for the filler line as for the feed line, my opps forgot about the filler line.
There is a oneway valve and its located at the end the fill nozzle is attatched.

Does the process that you stated release the gas only from the lines from the tank to the engine bay leaving the gas in the tank.

ONLY FROM THE LINES. Its a damn slow process to vent an entire tank of LPG unless one has the right gear...... not bad tho if the car / rig has been driven to the point of emptying the LPG tank completely, even then there will be a small amount of LPG under pressure remaining in the tank.
When I vent tanks here I burn the gas as its emptied from the tank in a similar system to what the SES / CFA emergency rescue guys use at car accidents where an LPG system is involved.
Emptying 100lits of LPG takes around 5 mins, but it takes around 15mins to set the damn thing up.

Try contacting the local emergency guys and see if they have a LPG burner for car accident scenes, if they do ask em if they want a free practice night and free gas to try it out on and sweeten the offer with a free slab for afterwards
Accident scene LPG burners are very similar to the "hot air ballon" systems ...... very impressive sight and fawkin loud as !!!
Other than that emptying the tank is not a job for the DIY guy with a shifter in hand.....

Kingy

[Mytqik]

Take it for a long drive to empty 95% of the tank. Then when you are home again, stick it on blocks (under the chasis of course) and then start the car, put it in gear & set the throttle to 30% to let it use up the rest of gas. You could of course let it idle for hours on end as well.

Then do as Kingy and other suggests.