thy removal of LPG from tb42 carby dual fuel

[DilboBaggins]

G'day fellas.

Quick question, does the lpg system screw with the engine after time? I read that it doesnt help with the heads? And would it be worth going straight petrol due to gas prices at around 95. Who do I talk to in Perth, and roughly how much am I looking at? I am slightly mechanically minded, so how much of it should I be able to do myself? Cheers guys, any advice is appreciated👍

[threedogs]

You should be able to strip it out yourself, gas wrecks your heads , well the valve seats.
@ 95 cents I don't think itd worth putting in, straight fuel would be better for your motor too
big gas places like Supa gas will take your tank for free

[taslucas]

I'd drive on gas until it runs out to try empty the tank as much as possible. Probably the most important bit is the petrol cutoff valve. You'll need to find this and remove so the petrol line is straight through. It should be near the carby. (yours ended up being a carby model didn't it?).
Generally the timing will be advanced more for gas and also it will probably have spark plugs suited to gas so these two will have to be put back to normal.
Normal petrol only timing should be 10 degrees, +/- 1 degree.
Recommended plugs are:
Standard type: BP5ES, gap 0.8 - 0.9 mm.
Obviously any holes left by gas lines you remove from the air intake will have to be blocked. While you're there give the carby a once over with some crc etc and make sure all the linkages are moving freely.

And Ofcourse be aware that any leaks are highly explosive!!

[DilboBaggins]

By all means ill give it a go, but im used to servicing dirtbikes hahaha. Would I be better of putting a long range petty tank on? Where would I get one for the right price? Cheers guys 👍

[threedogs]

Check ebay for AUX or long range tanks.
I have a 75 ltr aux tank frm Brown Davis
give Kevin a call for a price

[GQ TANK]

In melbourne lpg is at 80c and its still worth running - but not worth converting a truck to lpg

Make sure you truck is running properly on petrol - does it idle ?

Depending on the lpg mixer - you might need to purchase a standard air cleaner.

You could leave the lpg gas switch and petrol solenoid in as an ant theft device?

Turn the gas off at the tank (theres a valve. Carefully crack the gas line to the mixer - you should only get a short burst of lpg - i its constant you have not turned the tap off at the tank.

You can safely remove the tank, gas lines, filler (it has a one way valve at the tank), convertor and mixer - you might be able to flod them on evil bay if the tanks in date.

[taslucas]

By all means ill give it a go, but im used to servicing dirtbikes hahaha. Would I be better of putting a long range petty tank on? Where would I get one for the right price? Cheers guys

Just get in and drive it first mate. After a while you'll figure out what mods best suit your needs. No sense going overboard straight up.
The only person that knows if you need a long range tank is you. It's not rocket science lol.
Usually when a gas tank is fitted to these they put it where the factory petrol tank is and therefore fit a new aftermarket petrol tank to under the middle of the car. More often than not that aftermarket tank is bigger than factory.

[DilboBaggins]

Trust me guys, ive been reading everything I can find on what suits and what doesnt ect. As ive read plenty of times from different sources, ive found that lpg is crap, and especially for an everyday car running it, I dont want to keep giving the car a head job 😞 so thought id play it safe and remove it all together? Save some coin in the long run to do some well worth mods ive got in mind :D but it just doesnt seem worth the hassle of running gas at 95 cents p/L. My dads 98 gu 4.5l patrol had a gas convertion a few years back, he says its the worst thing his ever done! He done it back when gas was heaps cheaper, so back then it made sense to do it, but now its not.
So is the whole process off removing it easily enough done by myself? I know how to undo a bolt if that healps hahaha. Thanks guys!

[Robo]

sound like you have already made the decision, as the boys have said..
drive car untill lpg tank is well and truly empty.
then turn lpg valve off at tank.
remove what you don't need any more.
fix any lpg installation holes etc
if lpg tank was under body, fit a std or long range petrol tank.
how far you intend to drive on 1 tank should determine your useful tank capacity, "personal preference".
service carby.
retune car.
sell off tank etc.

looking at doing it myself also.

[warner01]

So many closed minded people. gas isnt as bad as people think. 99% of the time its the dodgy bloke that fitted a cheap crappy system. yes the head will last longer if not run on gas but i bet youl be pulling a head off a tb42 to fix the water galleries that have eaten into the head before you recess the valves from gas. one great advantage to gas on a 4wd is itl run on any angle so if your climbing a hill for example it wont run out of fuel. Even with todays prices i worked out im saving $9.60 per 100km by running on gas over petrol atm. but if you really wanna take it off its really not hard. just as the boys have said if you take the petrol lock off and just have the fuel running like normal to the carb all the wiring will be able to be taken off as all the gas switch does is turn off the petrol lock and turn on the gas locks. then simply remove the rest of the system.

[taslucas]

It's not close minded to speak of your own experiences.

[warner01]

true and im sorry if that offended any people. was not my intention. its just i hear this all the time that gas is evil and dont use it. its silly and as stated it's usually the dodgy gas fitter and the tons of crappy systems that scares people away. i understand youv'e had a bad experience but why not try going to a good gas fitter that actually kows what hes on about and talk to him about it. my father inlaw does gas and he's tought me also, and the amount of people that come in with a dodgy conversion that you basicly need to take off and start again is rediculous. i understand gas isnt for everyone and i admit i hated it to start with too but after seeing it done propperly and learning all about the good and bad systems ive changed my tune. i only give this advice as money is tight these days so if gas can even make it slightly easier for fellow patrol owners im willing to help with that any way i can. plus not getting fuel surge going up hills is awsome ;-)

[taslucas]

No offence taken mate :-)
I didn't have any bad experiences personally and I definitely don't think it's evil Haha.
Dual fuel was just not for me. A vehicle can't be optimised for both fuels. I find that when tuned for both, then it's not tuned perfectly for either.

[lucus30]

No offence taken mate :-)
I didn't have any bad experiences personally and I definitely don't think it's evil Haha.
Dual fuel was just not for me. A vehicle can't be optimised for both fuels. I find that when tuned for both, then it's not tuned perfectly for either.

I agree this is why I am considering removing it and also the lack of range on my gas mixer system. If my car was a everyday driver things would be different

My last trip to woods point I used 30l per hundred on gas

[GQ TANK]

Range is a concern running LPG

If you are looking at how much gas you are using compared to petrol is a waste of time. Lucus30, do you normally use 30L per 100 or was this a mixture of on and off road. How much petrol would you have used?

Look at how far you go - compared against $$$$

LPG is still cheap to run in melb in a petrol (excluding range and possible damage to the head) - if the LPG price gets closer to the petrol price then I will convert to Petrol and probably go efi. ( i have have a standard main tank and a long range sub tank)

[lucus30]

Range is a concern running LPG

If you are looking at how much gas you are using compared to petrol is a waste of time. Lucus30, do you normally use 30L per 100 or was this a mixture of on and off road. How much petrol would you have used?

Look at how far you go - compared against $$$$

LPG is still cheap to run in melb in a petrol (excluding range and possible damage to the head) - if the LPG price gets closer to the petrol price then I will convert to Petrol and probably go efi. ( i have have a standard main tank and a long range sub tank)

Fair bit of offroad and hills normally highway I get 22-25 on gas. My patrol is only driven when going away 4wding or day 4wd trips hence my thoughts

[ozzyboy]

Is it even legal to remove gas system yourself? Also the mod plate would need to be removed?

ozz

[DilboBaggins]

Thanks guys, heaps of Info about it. Ill tell you guys whats going on. So, I used to love riding bikes in melbourne, then moved to perth with a positive attitude then BAM! S**t loads of sand everywhere! Had a bad crash aswell and screwed my knee (ruptured acl) and have decided that ill sell the bike and get a 4x4 because I get my license in about 3 months so theres plenty of time :) so I was msging this bloke to do a straight swap for a 89 tb4.2 carby duel fuel with an out of date gas system :/. The photos looked good and was time to meet, we got there and he went over the car with us, had some rust and other problems, drove real well but the shoe didnt fit the foot so to speak. Plus he wanted a bike with reg and said if I sell the bike, I can buy the car for $3250? So in the mean time, im still looking around and trying to sell or swap my bike for the right patrol (anyone wonna buy an xr400). Thanks again guys!

[warner01]

my only advise is if your looking for a gq chances are its goona have rust especially with only a swap for a bike. but remember rust doesnt break down and leave you stranded in the middle of no where. if it drives nice and runs good then id prob be inclined to want that over a pretty body that drives horrible. Just remember the ones that are a bit rough round the edges are always better when it counts. ;) if you know what i mean......

[menace 2]

I took mine off my TB42e Lucas..it is easy to do.....I had an Impco system with a 90 ltr tank at the back...there was a relief valve in it to empty it but make sure that is all you are doing at the time and where you are ...definitely no smoking ( a given I suppose)..I was getting better mileage from petrol so it just balanced out with the lower cost for gas...plus for touring outback I feel an extra petrol tank in the back would be more beneficial considering the lack of available gas outback.....the car runs much better but I did put a new head on with a complete new exhaust system ..but it didn't seem to actually lose all that much power in comparison with the petrol ...just slight......

You will need to check if your car is registered with gas on it because if so then after you remove it (and make sure you also remove the filler and lines and gas cert plate on the firewall )..you will need to get it de-commissioned by a gas place and get the certificate to present for registration....cheers

[Robo]

Just checked our N.S.W rego papers Not a mention of LPG on rego paper work.

if you are removing lpg you will also need to remove the lpg sticker from number plates.
the sticker is the first thing the fire'es look for a scene of a accident.

[threedogs]

I would think you had a compliance plate pop riveted to your fire wall

[Robo]

I would think you had a compliance plate pop riveted to your fire wall

Yes very true it does .
from memory that's already been mentioned.