[explosivesilence]

First off I am new to the forum and everything I have read already has been amazing help, so thank you everyone. I do have one question so far when it comes to the 6g74 Conversion.

A little background, I am at the point where I finally am going to start building me 93 Stealth ES. The car has 220,000 miles on it, and is starting to burn a little oil. So, of coarse getting it rebuilt or a new motor is on the top of the list before any up grades.

My question is what is the differences between doing a 6g74 conversion or just when rebuilding the lower end just boring it out to 3.5L? What would the advantages be over the disadvantages of each? If I were to just bore out the 6g72 everything would already "bolt" right up (if it can even be done).

 

[TUFFTR]

The 6G74 block is 18mm taller, it's physically a larger building block.
Boring out the 3L will require a custom crank/pistons.
The 6G74 engine should be roughly $1500 drop in.
Advantage - Just drop it in.
If you decide to rebuild just the bottom end, you'd be crazy not to rebuild the top end too. So straight up, you're looking at a $5,000 rebuild, fresh heads (cams?) rebuild bottom end and full 60K kit.

 

[explosivesilence]

Ok. Of coarse if I was to rebuild the bottom end I would rebuild the top end also. So as long as I have the 6g72 with the correct sensor placement, I can literally buy the Debonair 6g74 and drop it right in without any other changes? If that is the case than that would definitely be cheaper than boring out the 6g72. Which in turn would leave me more funds to build the top end if choose to. Does that all sound right?

 

[TUFFTR]

That's correct. They are all a "late 93+" style engine with seperate cam and crank angle sensors, so if yours is an early build, this will literally be the only modification needed wiring wise.

 

[explosivesilence]

Alright. Thanks again for your help, I really appreciate it. The last question I have is that I remember reading that (of course) you don't want to run the 6g72 injectors. What size injectors should be run in the 6g74?

 

[TUFFTR]

The ones that come with it 240cc units.

 

[explosivesilence]

Ok. I just want to make sure I knew in case I cannot get a 100% complete engine and I have to buy a "bare bones" block and heads.

 

[Kyoshosp2]

Debonair engine is the same as a diamanté engine ?

 

[TUFFTR]

Debonair engine is the same as a diamanté engine ?

Incorrect, and been covered many times.
Diamante's DID have a 6G74, although, research will show you, only SOHC, and face the oppsite direction.

You CAN use a Montero/Shogun/Pajero block and work off it. But the EASIEST solution is to use the Debonair Engine. It's the only FWD orientated Motor that quite literally drops in.

 

[ezskanken]

Okay this is pretty exciting to see reading through this sticky. Say I found a 6G74 3.5L V6 out of a Debonaire/Pajero, but don't know if it's FWD or RWD yet reading through the description. Don't know if it's just a pulled engine, or has been re-built as well. Here is my question, or questions:

1. FIRST BIG QUESTiON is I am literally about to pull the trigger on a bunch of replacement part for my stock 95' N/A 6G72 engine (VSS, Water Pump, Oil Pump, 99' Lifters, Thermostat, Head Job, Red Cams, Heater Hoses, and all necessary gaskets and seals. Say the price for all these parts come out maybe $1500-$2000, but I can buy a 6G74 engine for $2k, the 6G74 would be the better option correct? Assuming that the 6G74 has been re-built?

The intake manifold says, "TCL 3500" and the valve cover looks exactly the same as our engines.

I'm getting breakfast ready for my kids before school, so I haven't read through all the pages just yet. The first page got me all excited though, since I literally just found a listing for this engine not 20 minutes ago.

I will surely sit down with my cup of coffee and read through later. Just looking for some opinions, and maybe some questions to ask when I email the lister.

 

[ezskanken]

Ok so I just read through this whole thread. First off, TUFFTR THANK YOU SO MUCH! You possibly saved me a lot of heart ache, and more importantly time if this 6G74 engine that I found is re-built and not pulled. I just saw your comment about the intake manifold saying 3500 on it, which the one I am looking at does so that's a good sign. I will post up more pictures of what I am looking at just to make sure through.

So if my car a 95' SL N/A (wife's car more like lol) is pretty much stock except for the following:
3SX 2.5" Downpipe
Maximal Peformance Test Pipe & 2 Canister Mufflers
K&N Intake

It should be a direct swap? No changing of anything that will prevent the car from starting up, and running fine correct? Pretty excited, if all this is so then I'm gonna pick up the engine tomorrow! Ha ha!!

I really hope it's been re-built and not pulled though, but if it's the later I don't know what to do...

EDIT: Read through again and it looks like I'll ned a 1cm spacer for the downpipe.

 

[ezskanken]

Pic #1

 

[ezskanken]

Pic #2

 

[ezskanken]

Pic #3

 

[ezskanken]

Pic #4

 

[ezskanken]

Pic #5

 

[pimprn]

Thanks for pics man ill be putting mine together shortly But im useing 6g72 heads on mine

 

[gs1000kat]

Quick question. I am wanting to do the 74 conversion. Not having much luck lately finding an engine though.

Would I be able to use the Montero block to start putting the shortblock together then use the accessories off a Debnair engine when I am able? to find one? Or is there an easy way to get just the accessories?

I've seen part numbers for them, but read they were not available in the US.

Additional info There is a Montero SR for sale about 1.5 hours from me and a 3.5 in a junkyard about the same distance. These are what I am considering starting with. I do have a crank already from when I was thinking about a stroker.

 

[pimprn]

The montero i believe your heads will fit on it. As far as the accessories i think its the same man, except that ac im not sure i can take pics of my 6g74 and show you? Im just putting the stuff on from my 3.0l but i havent put the alternator on yet im waiting on a few things.

 

[TUFFTR]

Thanks for pics man ill be putting mine together shortly But im useing 6g72 heads on mine

You do realise if you use the debonair engine the heads are 100% identical right? All part numbers inc cams correspond with 6G72 part numbers. There's ZERO point in doing this.