I'm having alot of trouble finding information on this that doesn't conflict.

What I need to know is if I do V6 12 to 24valve engine swap whats needed.

I understand that the exhaust manifolds are going to need to be changed but have heard otherwise so could someone confirm

And will the current ECU and loom work for a manual?

I'm having alot of trouble finding information on this that doesn't conflict.

What I need to know is if I do V6 12 to 24valve engine swap whats needed.

I understand that the exhaust manifolds are going to need to be changed but have heard otherwise so could someone confirm

And will the current ECU and loom work for a manual?

Pretty sure you'll need a new ECU-the one that comes with the DOHC engine, though greabox TCU stays as you use the same 'box.

Exuahst/Inlets will change due to different heads/stud patterns.

I thinkm you might need an engine loom also...not sure

Best to contact GoTrice, Dimi108 or TUFFTR for this one mate:)

Oh and Welcome to the club:)

deff need a new ecu, got more valves to control yo!

Pretty sure you'll need a new ECU-the one that comes with the DOHC engine, though greabox TCU stays as you use the same 'box.

Exuahst/Inlets will change due to different heads/stud patterns.

I thinkm you might need an engine loom also...not sure

Best to contact GoTrice, Dimi108 or TUFFTR for this one mate:)

Oh and Welcome to the club:)
I wouldn't use the stock ECU, the whole idea of the DOHC swap is a performance mod, so why go a half measure with a ****ty stock ECU and not go a full aftermarket? Worth the extra money. TCU will stay put as the auto will bolt up, but if you can drive a manual then swap a manual gearbox into it.

Exhaust ports are elongated so you might want to have some extractors fabricated. Obtain a set of stock primaries or have an exhaust place fabricate a flange and get them to go from there.

Engine loom would be pretty much useless as you'd be cutting it to pieces anyway for the ECU installation. Just make sure you have all the plugs and a few inches of wire from each so you can extend the wires to the aftermarket ECU.

If you want aircon you'll have to have the pipes fabricated and reconnected, and then regassed too.

Haven't actually done this conversion myself but I've had to explain most of it to TUFFTR anyway :P

Re: Aftermarket ECU

OP said asked if the current would work...I assumed he'd do this to save money-hence the suggestion for stock DOHC one. I personally would go aftermarket, but some people would prefer to go stock...:P:)

Re: Aftermarket ECU

OP said asked if the current would work...I assumed he'd do this to save money-hence the suggestion for stock DOHC one. I personally would go aftermarket, but some people would prefer to go stock...:P:)

I thought this too, I agree with lucifer - why go this far without going the last little bit but also if i did the conversion I'd probably go a stock ecu.. sometimes the extra performance isn't worth the couple grand on the ecu and tune.

If your doing an engine conversion, saving money on it shouldnt be in your books :P

My DOHC motor came with TCL, so i retained the standard SOHC throttle body on it.
Extractors, well its one part i do save money on.
Standard manifolds from the US cost me $66AU to my door and bolted up with the help of 2 x 1cm spacers which cost me just over $10 - So it all bolted up for under $90
Engine mounts, check these, replace if nessassry.
I would go a full aftermarket ECU - looking at about $1200-$2000.

Intake? i used nice shiney intercooler piping as I have no MAF, so that'll cost ya more $$ too, but gives you the chance to reloacte the fuse box to the place where the air box usually is and lets you get rid of that UGLY battery holder.

make sure you do timing belt/water pump/tensioners. these have 2 tensioners on them so make sure the gas tensioner is up to scratch aswell. usually if it holds tension for more then half a day your fine.

btw - everything can be had from the US realy cheap.
i would not bother with the auto - these auto gearboxes suck TEH WANG

Harreh, use the search function. There's oodles of information on here. And there's a whole diary i kept of the progress (and problems) on the DOHC conversion i did last year on my old car. It can be found here (http://www.aussiemagna.com/forums/showthread.php?t=53932&highlight=GTO)

read tufftr's thread, it is full of useful information.. .

yeah really need to clean up dimi's thread and add it to the 2nd gen how to's. Was such a shame to lose paul's (Killbillys) original thread.

There are ECU pin out diagrams on 3si.org so it may be as simple as running a few extra wires and changing all the SOHC pin out locations. In the engine bay you'd have to relocate a fair few wires to their DOHC positions from SOHC ie alternator among others.

Dimi especially had to find this out the hard way (we didnt know about these then). With the manual tranny its just the ECU you have to worry about.

The exhaust is a simple decision do it the paul (TUFFTR) way or do it the aj way. I had extractors custom made for 1k$ and you can see below what paul did. He'll regret it when he hears mine in the flesh.

Heres a good link for the timing belt; http://vr4stealth.com/60k-tune.htm

yeah really need to clean up dimi's thread and add it to the 2nd gen how to's. Was such a shame to lose paul's (Killbillys) original thread.

There are ECU pin out diagrams on 3si.org so it may be as simple as running a few extra wires and changing all the SOHC pin out locations. In the engine bay you'd have to relocate a fair few wires to their DOHC positions from SOHC ie alternator among others.

Dimi especially had to find this out the hard way (we didnt know about these then). With the manual tranny its just the ECU you have to worry about.

The exhaust is a simple decision do it the paul (TUFFTR) way or do it the aj way. I had extractors custom made for 1k$ and you can see below what paul did. He'll regret it when he hears mine in the flesh.
Heres a good link for the timing belt; http://vr4stealth.com/60k-tune.htm

You'll regret it when I beat you :P
I had the money but needed to pay some other things off, so i thought they could wait.
For the $1K Go the full ECU.

']You'll regret it when I beat you :P


Probably get it to start first champ before you challenge the big dog lol

I'll put my new clutch in and do a run sometime.

Probably get it to start first champ before you challenge the big dog lol

I'll put my new clutch in and do a run sometime.
Nah I like challenging first :P

Wow guys, thanks for all the responses.

The swaps actually going to be for a Manual Pajero, the pajero's run the 6G72 motors and its a cheaper option to use a magna engine than a Paj engine if your up for the extra work. Going full aftermarket ECU would be to expensive and at the end of the day its just a pajero :P

So the loom itself needs be swapped out, hmmm, suddenly alot more work arises from this :(

Wow guys, thanks for all the responses.

The swaps actually going to be for a Manual Pajero, the pajero's run the 6G72 motors and its a cheaper option to use a magna engine than a Paj engine if your up for the extra work. Going full aftermarket ECU would be to expensive and at the end of the day its just a pajero :P

So the loom itself needs be swapped out, hmmm, suddenly alot more work arises from this :(

since its in RWD format will it use a different intake manifold?
Its a few days of full on work, engine in and engine out will take about a full day, its just the wiring which is the PITA

']since its in RWD format will it use a different intake manifold?
Its a few days of full on work, engine in and engine out will take about a full day, its just the wiring which is the PITA

Yes it will, basically to do a 12v to 12v swap you need to take your paj engine out and take EVERYTHING off it and swap it with the magna, only thing you can really use from the magna engine is the bottom and top end, but its a damn sight cheaper.

To be completely honest if the whole loom needs to be replaced I'd probably give it a miss, to much work for the gain I'd get.

Thing is it just seems the 3 litre DOHC are a whole lot easier to source than the SOHC

Yes it will, basically to do a 12v to 12v swap you need to take your paj engine out and take EVERYTHING off it and swap it with the magna, only thing you can really use from the magna engine is the bottom and top end, but its a damn sight cheaper.

To be completely honest if the whole loom needs to be replaced I'd probably give it a miss, to much work for the gain I'd get.

Thing is it just seems the 3 litre DOHC are a whole lot easier to source than the SOHC
I wouldnt say that about how easy they are to attain, they come and go, and ive had prices range from $500 to $1300 for the same freeken motor.
3.5L SOHC 3rd gen engine might be the way to go?

Don't think the 6G74 bolts up to the bellhousing although if it did that would certainly be woth the added effort.

The loom and ECU would still need to be replaced to my understanding. Also the current is a dizzy, i thought the 6G74 was a coilpack motor

Don't think the 6G74 bolts up to the bellhousing although if it did that would certainly be woth the added effort.

The loom and ECU would still need to be replaced to my understanding. Also the current is a dizzy, i thought the 6G74 was a coilpack motor

Well Im using a 6g74 (dohc) on mine and bolts up no worries.
and nah the SOHC's are dizzy, DOHC's are coilpack

Hmmm, what would needed for the conversion other than the motor obviously? I'm assuming ECU and manifolds. Were any engine parts interchangable

This might be a worth while route to investigate.

Hmmm, what would needed for the conversion other than the motor obviously? I'm assuming ECU and manifolds. Were any engine parts interchangable

This might be a worth while route to investigate.

No ones done this conversion in a FWD car as the motor faces the other way for us.
You would probably have the small issues of oil dipstick on the wrong side etc.

you would need custom manifolds made up and that right there is about $1000 :P

anything that doesnt come factory will set you back a bit to get working I think :P
You could probably run the loom and ECU from a 3rd gen magna.
Hell if you can find a wrecked one for a few hundred buckeroonies snap that up.

TB will be at the front aswell, but you can use a 2nd gen DOHC intake manifold to have it the other way

Hmmmm as much as I'd love to do it I think the missus is going to crucify me, 2 cars and 2 bikes I think I'm pushing my luck if I do this haha. Not just that but I've just scored a 6G72 12v for $200 with 190k kms, might just drop that old donk in.

Thanks for the advice mate, very helpful

Hmmmm as much as I'd love to do it I think the missus is going to crucify me, 2 cars and 2 bikes I think I'm pushing my luck if I do this haha. Not just that but I've just scored a 6G72 12v for $200 with 190k kms, might just drop that old donk in.

Thanks for the advice mate, very helpful

welcome.
make sure you do a timing belt water pump service etc etc on that motor too
ALSO make sure the breathers are working and not clogged! gayest rocker covers ever.

Yeah definately doing a thorough check over before she goes in, the water pump has to come of my paj motor anyways.

As much as I'd love to do the bigger engine I just cant argue with the $200 price tag heh