4.2l petrol/gas advice

[DilboBaggins]

Looking at getting this gq 4.2l dual fuel. Can someone please fill me in on what to look for, what are some problems I should keep an eye on while test driving? Is this engine reliable at all? If I do happen to get this rig, what should I do to it first to get the most out of it, like exhaust, chip ect. Thanks in advance

[Bloodyaussie]

Carb or EFI mate.... There are a few people including myself that have gotten rid of the gas systems of there rigs lately.

I could not justify the gas when it costs so much and the damage it does to the engine plus getting fuel in the High Country is a real issue for me.

Engine wise they are tough but a dreaded head gasket can cost big dollars if needs doing.

[DilboBaggins]

Im not actually sure which one it is, but hoping for EFI according to some forums, but in saying that, people actually rather the gas convertion installed. When I do look at the vehicle, what problems should I look for? Thanks mate

[Bigcol]

what info do you have on it......
year.... - this will tell if its Carby of EFI

basically, as BA has said, most are taking the Gas off because there is not much difference in cost, and depending on where you are, depends on ready access to supply of Gas

also depends on what you want to do with it

cheers

[DilboBaggins]

Im still awaiting information on it, I will be very dissapointed if its an automatic though, would it be worth converting it to manual or just buy a manual? Because im actually trading my 2002 honda xr400 for it. I have next to no info about it, I still dont know how many k's it has!! Ill keep use informed when I get more info and I'll let use decide for me LOL. Thanks guys, I really appreciate it :)

[taslucas]

What will you be doing with the vehicle?
Shorter harder 4wding?
What type of offroading?
Longer touring trips?
Will it be a daily driver?
Will it be your only transport?
How many ks a week will.you be putting on it?
Do you like to drive fast or crawl?
Will you need to tow?
Do you have friends that you will go out driving with?

The answers to all these will help pick the type of patrol, the mods that will help you the most and the best order to do them.

I have a tb42 carby auto wagon. I love the auto for the type of driving I do. I don't mind the high fuel use as I usually only do day trips close to home. It was a dual fuel but I converted it back to petrol only.
I bought it with 410,000 ks on the clock......yep these engines are tough!

[DilboBaggins]

Well its my first car, wont be doing anything too stupid in it I hope, I plan on using it to get to and from work (daily driver) shouldnt be towing often and isnt that the first rule of 4x4ing? Never go alone! :)

[taslucas]

Ok how many ks is your daily commute? These petrol 4.2 litre patrols chew the juice. The Efi (tb42e) are more fuel efficient than the carby (tb42s)
If it is flat highway driving then leaving the gas set up on there would probably be a good idea. (how much is gas a litre over there?).

A two inch lift and 33" tyres are a great entry level set up that will get you to many places. It'll get you everywhere except for big deep ruts made by bigger tyres.

When you test drive, test it on both fuels, try turning off and starting on both. Test the 4wd high and low (best to find some gravel and put the hubs in to do this), listen for any obvious loud noises.

There is a thread on here somewhere that details good inspection advice. I think it's called "buying a 4wd, what to look for" or something similar.

[DilboBaggins]

Ill definitely look into that, thanks heaps mate

[GQ TANK]

If its a carby model, make sure that it will idle in petrol. As this is a good indication if the carby needs a kit.

With the truck cold, remove the radiator cap and start the car - if you get a fountain of water -= suspect head gasket

Check the coulour of the oil - milky = head gasket

Take it for a drive check you don't get the wobbles - drive on a freeway at 100km.

I get around 350Km on 90l of gas - petrol ?

[DilboBaggins]

Thanks GQ TANK, I still havent heard from him yet, im wanting to know if its auto or not. If it were to be an auto, is it worth the hassle of converting it to manual? Or should I just get a manual? Does anyone know of a rough figure id be up against with the conversion to a manual? Thanks guys :)

[taslucas]

Are you sure you have to have a manual? I chose auto on purpose as did a few around here. Test drive first.
I'd say it's not worth doing a conversion on it. Unless it's a super clean low k vehicle. Tb42's are fairly cheap these days so if you really want a manual I'd go for one straight up

[Drewboyaus]

Autos work really well off-road......less skill but heaps easier to drive, especially in rocky technical stuff.......

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[GQ TANK]

I would leave it as an auto - only consider convberting it if you blow the auto as they can cost a few K to fix,

The other advantage in running a auto is you dont need to replace the clutch every 100000km

[DilboBaggins]

I cant stand autos :( there boring I reckon anyway.
Guess what guys, its a manual!!! WOO👍

[taslucas]

I cant stand autos :( there boring I reckon anyway.
Guess what guys, its a manual!!! WOO

Nothing wrong with the constant drive of an auto on a hill:-)
But yeah, go for what you want.

[DilboBaggins]

This just in: the bloke text me this morning and I asked him is it carby or fuel injection. Turn out its the carby one :( has anyone done the conversion to efi on on of these engines before? Is it simple to do yourself? How much would I be looking at to get this done? I also read somewhere that with converting to efi, itll only pass the emissions test if its straight gas? Someone please tell me thats not true!! Thanks :)

[Dales300exc]

Nothing wrong with a carby model.

EFI would pass emission no worries. Less emissions than a carby thats for sure. You would need to install a cat too.

[DilboBaggins]

Cant trust anythin I read these days hahaha its all a** about. Would the conversion be a good idea for fuel economy?

[Drewboyaus]

Cant trust anythin I read these days hahaha its all a** about. Would the conversion be a good idea for fuel economy?

The conversion to EFI would, yes.

Sent from my iPhone using Forum Runner

[kool-lights]

This is your first car, right?
EFI or carby isn't that important just now.get the damn thing and drive it. Get a feel for how it handles, how it drives. There are heaps of mods you can do ONCE you know what you need.

[taslucas]

What will you be doing with the vehicle?
Shorter harder 4wding?
What type of offroading?
Longer touring trips?
Will it be a daily driver?
Will it be your only transport?
How many ks a week will.you be putting on it?
Do you like to drive fast or crawl?
Will you need to tow?
Do you have friends that you will go out driving with?

The answers to all these will help pick the type of patrol, the mods that will help you the most and the best order to do them.

I have a tb42 carby auto wagon. I love the auto for the type of driving I do. I don't mind the high fuel use as I usually only do day trips close to home. It was a dual fuel but I converted it back to petrol only.
I bought it with 410,000 ks on the clock......yep these engines are tough!

Read this again dildobaggins (lol, that name cracks me up)
Answer a few of the questions and you'll get a lot better advice. Every mod is relative to the type of driving you'll do.
If you want efficiency, get a 2.8 diesel
If you want power go nothing under a 4.2 (petrol or turbo diesel)
There's threads on here that detail fuel usage of different engines and setups.
What some people won't pay for a fuel bill, others will.

[DilboBaggins]

Thanks guys, I really appreciate your help. I think im just a tad excited about the whole concept of driving myself. So ill appreciate the car for what it is now, and improve later on down the track. Its got just over 410,000kms on it, should I be concerned of when the gas system was put in? And if it were to be a costly fix, it'd benefit me more just to go straight petrol wouldnt it? I just want to get dirty already!!😈

[mrflibbles]

just to add if you plan on keeping the gas set up make sure the system is in date.
For daily drive i would possibly keep the gas if your doing a few kms. My 90l gas tank will get me about 300-350kms on my efi 4.2.
But best if you check everything out, get someone to have a look with you (they may notice something you dont!)
Also check for rust, it sucks trying to get rid of rust!