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Different make and model for the 3.5L engine #1012101 11/01/10 06:17 PM
Joined: Oct 2010
Posts: 23
jfrey123 Offline OP
Need a Spot
Hi guys,

I'm new to the board, and by my sig you'll all notice I don't drive a Mitsu. I actually have a Kia Sorento, and a while back I found out Hyundai makes the 3.5L in it from the design of your guy's 3.5L 6G74. I've done some digging in the archives here, and I'm not sure if many Montero's ended up with the 3.5L or not. I'm interested in what types of upgrades everyone here is doing to their 3.5L? Are there any problems you guys have found with them?


Also, if my question is worthy of discussion, my Kia came with a 5 speed manual. I noted a thread before where some guys were looking into 6 speed transmissions. I was also wondering if anyone ever found a 6 speed that mounts up? The Kia 5 speed is great, never had an issue, but the 5th gear is a little high for me as I spin about 3,200 engine rpm at 70MPH.


If any of you Mitsubishi guys need a high output alternator, the Kia's came with a 120amp from the factory that should pretty much bolt up (although I'm not sure about wiring issues...)

Cheers!


2005 Kia Sorento LX - 3.5L with 5 speed manual
2" Daystar spring spacer lift - 265/75R16 BFG's fitted
Custom front bumper with hitch mount, sliders, engine skid.
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Re: Different make and model for the 3.5L engine [Re: jfrey123] #1012102 11/02/10 02:29 AM
Joined: Jan 2008
Posts: 985
1
1986powerram50 Offline
Rock Warrior
*****
How simlar are they? From what I heard, hyundai also has there own version of the 4g63 cept..... the intake ports are different.


--keRby

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Re: Different make and model for the 3.5L engine [Re: 1986powerram50] #1012103 11/02/10 02:47 AM
Joined: Feb 2005
Posts: 1,508
ryany Offline
Body Damage is Cool
Correct me if I'm wrong, but I'm pretty sure the Sorento is a front-wheel or all-wheel drive vehicle. You won't find any transmission compatibility with the rear wheel drive Monteros.

The 3.5 V6 started out in the '94 Monteros as a DOHC engine and switched to a SOHC design in '97 or so. This engine was used through the 2000 model year when it was replaced with the 3.8 liter 6G75. My guess is that Kia more than likely used the design for the very durable Mitsubishi 6G74 bottom end but equipped it with their own heads, manifolds, etc. - I would be surprised if there was much else that was easily interchangable.


95 Montero SR 3.5
OME shocks & springs, cranked torsion bars, 2" body lift, 3" gas tank lift, 4.90 gears, Aussie front locker, factory rear locker, Aisin manual hubs, Roger Brown Rock Sliderz, 315/75r16 (35") tires, 2 1/4" exhaust with Magnaflow muffler
Re: Different make and model for the 3.5L engine [Re: ryany] #1012104 11/02/10 04:17 PM
Joined: Mar 2009
Posts: 294
D
dougl3nc Offline
Mudrunner
Quote
This engine was used through the 2000 model year when it was replaced with the 3.8 liter 6G75.


VERY incorrect! The 6G74 ran into the 2003 US model year and was replaced later in '03 by the 6G75.

I know that my 01 Gen3 Montero has a 6G74. I don't believe any other manufacturer that uses a 6G74 or derivative thereof puts it in a RWD configuration.


1989 Raider SWB Auto 3.0L...It's ALIVE!
Currently on a shakedown cruise...
Re: Different make and model for the 3.5L engine [Re: ryany] #1012105 11/02/10 05:23 PM
Joined: Oct 2010
Posts: 23
jfrey123 Offline OP
Need a Spot
Quote
Correct me if I'm wrong, but I'm pretty sure the Sorento is a front-wheel or all-wheel drive vehicle. You won't find any transmission compatibility with the rear wheel drive Monteros.


Sorento changed to a FWD minivan abomination in 2011. From 2003-2006 they were RWD, came with a full ladder frame, dedicated transfer case with 2hi, 4hi and 4lo, and an Eaton carbon fiber LSD in the rear axle. 2006-2010 they maintained the ladder frame, but the T-case was changed to a full time 4wd with 4lo and they ditched the LSD rear. (excuse my wrong terminology here) At the transfer case, the front and rear drive shaft bolt up via flange, not a slip yoke, and the drive shafts themselves have slip units.


2005 Kia Sorento LX - 3.5L with 5 speed manual
2" Daystar spring spacer lift - 265/75R16 BFG's fitted
Custom front bumper with hitch mount, sliders, engine skid.
Re: Different make and model for the 3.5L engine [Re: 1986powerram50] #1012106 11/02/10 05:27 PM
Joined: Oct 2010
Posts: 23
jfrey123 Offline OP
Need a Spot
Quote
How simlar are they? From what I heard, hyundai also has there own version of the 4g63 cept..... the intake ports are different.


I'm pretty sure the intake manifold is different, meaning also the TB is different. One of the projects (when i have spare cash) I want to try is taking a Mitsu intake manifold and seeing if it would work with my heads, then maybe take advantage of any TB upgrades that are available to you Mitsu guys.

I'm positive many accessories and bolt on parts are different, with the exception of the alternator which appears I got one of the 120 amp units that are sought after by some. But I'm fairly confident the blocks are the same, right down to the problem with the crankshaft bolts both Kia and Mitsu have experienced. Makes me hopeful if anyone here has found an upgrade or something that is useful, that maybe I could take advantage too.

I don't mean to come in as a black sheep. Obviously Kia's don't have a huge aftermarket following, information is sort of sketchy at best, but it's what I have and I'm looking to do what I can.


2005 Kia Sorento LX - 3.5L with 5 speed manual
2" Daystar spring spacer lift - 265/75R16 BFG's fitted
Custom front bumper with hitch mount, sliders, engine skid.
Re: Different make and model for the 3.5L engine [Re: jfrey123] #1012107 11/02/10 05:37 PM
Joined: Jan 2000
Posts: 16,226
off-roader Offline
Web Wheeler
*****
Quote
I'm pretty sure the intake manifold is different, meaning also the TB is different. One of the projects (when i have spare cash) I want to try is taking a Mitsu intake manifold and seeing if it would work with my heads, then maybe take advantage of any TB upgrades that are available to you Mitsu guys.

I'm positive many accessories and bolt on parts are different, with the exception of the alternator which appears I got one of the 120 amp units that are sought after by some. But I'm fairly confident the blocks are the same, right down to the problem with the crankshaft bolts both Kia and Mitsu have experienced. Makes me hopeful if anyone here has found an upgrade or something that is useful, that maybe I could take advantage too.

I don't mean to come in as a black sheep. Obviously Kia's don't have a huge aftermarket following, information is sort of sketchy at best, but it's what I have and I'm looking to do what I can.


Thanks for the tip on the alternator. Don't recall if it's already known or not but I'm sure someone here will recall and have a link to a prior post if it exist.

As for an intake manifold, have you tried sourcing one from a local pick n pull salvage yard? Can probably get one pretty cheap to do some test fitting. Not sure if rxinhd has one but he might. He's closer to you in the placerville area. Perhaps cap510 has an extra one also and he's in the bay area although I'm not sure if its available for loan/sale. <img src="/forums/images/graemlins/cheers.gif" alt="" />

Re: Different make and model for the 3.5L engine [Re: 1986powerram50] #1012108 11/02/10 05:58 PM
Joined: Sep 2009
Posts: 244
3
300D50 Offline
Wheeler
I think my friends Tiburon has what, for all intents and purposes, is a 4G63 in it. Very very similar design.

One difference is bore & stroke on the Hyundai beta 2.0 is 82mmX93.5mm, compared to 85mmX88mm for the 4G63.

I'm blissfully ignorant of what that means performance wise though...


1989 Dodge Power Ram 50 w/ no engine <- rotten frame <img src="/forums/images/graemlins/frown.gif" alt="" />
1988 Power Ram 50 2.6 Long Bed
1990 Mitsubishi MightyMax V6, swapping to the Daimler-Benz OM617 3.0L I5 diesel
Re: Different make and model for the 3.5L engine [Re: 300D50] #1012109 11/02/10 09:01 PM
Joined: Oct 2010
Posts: 23
jfrey123 Offline OP
Need a Spot
Quote
I think my friends Tiburon has what, for all intents and purposes, is a 4G63 in it. Very very similar design.


From Wiki:

Mitsubishi 6G74
The 6G74 is a 3497 cc 24-valve unit available with either SOHC, DOHC, or MIVEC DOHC. Bore is 93 mm and stroke is 85.8 mm. Output is 153 kW (208 PS; 205 hp) at 5000 rpm with 313 Nm (231 ftlbf) of torque at 4000 rpm for the SOHC, 194 kW (264 PS; 260 hp) at 6000 and 324 Nm (239 ftlbf) at 4500 rpm for the MIVEC. The most common 6G74 has a cast iron engine block and an aluminum cylinder head. It uses MFI fuel injection and uses forged steel connecting rods.


KIA
The G6AU and G4HC (both also called the 3.5 D ) are the large 3,497 cc (3.497 L; 213.4 cu in) versions of the Sigma engine. Bore and stroke are both larger at 93 mm (3.7 in) and 85.8 mm (3.38 in) respectively. Output is 200 hp (149 kW) at 5500 rpm and 214 ftlbf (290 N m) at 4800 rpm for the older G6AU V6 and 217 hp (162 kW) at 5500 rpm and 232 ftlbf (314 N m) at 3500 rpm for the new G4HC Sigma.

The 3.5 D has a cast iron engine block and aluminum DOHC cylinder heads. It uses MFI fuel injection, has 4 valves per cylinder, and features forged steel connecting rods. It is designed to run on "regular" unleaded gasoline rather than the premium fuel used in many other high-output V6 engines.





Other research has lead me to where I'm at now. Kia has used lots of engines from other companies in the past, I know the old Sephia's had a version of the Miata motor but they removed the oil injectors in their redesign which is why the Sephia's always blew up.

I'll keep an eye out in my junk yard for the 3.5L from the Monteros, now that I have a better idea of what model years they came in. Thanks guys!


2005 Kia Sorento LX - 3.5L with 5 speed manual
2" Daystar spring spacer lift - 265/75R16 BFG's fitted
Custom front bumper with hitch mount, sliders, engine skid.
Re: Different make and model for the 3.5L engine [Re: jfrey123] #1012110 11/02/10 09:11 PM
Joined: Jan 2000
Posts: 16,226
off-roader Offline
Web Wheeler
*****
Quote
I'll keep an eye out in my junk yard for the 3.5L from the Monteros, now that I have a better idea of what model years they came in. Thanks guys!


Note:
94-96 had DOHC 3.5's (higher hp but will eventually have butterfly valve issues)
97-99 (or 2000) had SOHC 3.5's (lower hp but don't believe suffer from butterfly valve issues)

<img src="/forums/images/graemlins/kewl.gif" alt="" />

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