2005 v6 swapped in a 2006 v8

[BlackWorksInc]

If you're just flipping these, I'd find out what the mechanical issue is that makes them "non-running." If I recall that can also mean transmission issues as well. To make the swap "easy" and really workable, you need to basically gut a V6 4Runner and transfer it all over. Drive train, harness, modules, engine, ect. At that point you're better off repairing the engine damage.

I was thinking you're just doing this for fun, but if you're intending to flip the vehicle to another person that's a different story.

 

[luke87gt]

There are certain engine swaps that are worth the effort, the headache, the cost, the complexity, etc...

For instance, I'd love to see someone here swap an LS3 or LS7 into one of our SUVs.

But to take a dime a dozen V6 4.0 and swap it for a V8 4.7, that would be insanity given the limited power gains, limited novelty factor, limited rarity introduced, etc.

 

[bowtiedmax]

Actually I really don't just flip the 4 runners . We just keep upgrading to the next generation when we can ! Lol. But I need 3 more for the family . My daughter In law , my girlfriend and me ! Lol. I'll prolly get one or two more 4 gen because I have parts . But we all like the newest versions! Lol

 

[AuSeeker]

I would try and fix the V8, but that depends on what is wrong and the cost factor vs the end value.

That being said if you do the swap PLEASE start a build topic so we can learn what has to be done and follow along!!

 

[5vzT4R]

Just so you know, the early v6's had alot of bad headgasket issues that were resovled around 07. All the v8's are about as reliable as a engine can be when maintained properly. 300k+ trouble free miles is very common for the v8's and later model v6's.

I have never done or seen a swap in person for any modern Toyota, but I have read that most the time, its simply not worth the headaches. This isnt any help on a actual swap, but its what I and countless others have read about. If you decide to proceed, please document the swap for future information.

 

[bowtiedmax]

I got my son a 2006 v6 4 runner in Hawaii ( he's stationed there ) and it was there as not running mechanical . He put head gaskets and all was good . He did both but it was the drivers side . I guess that's the common side and issue ?
But yes if I win one with a v8 I will certainly see if it's fixable first . I'll only do the swap if it's a junk engine

 

[t-man]

V8 is very reliable, but timing belt needs to be changed as if it breaks say bye-bye to everything internal! This has been stated.
Wiring harness from V6 to V8 is different and would need to be swapped including all the computers. If 4wd the V8 is full-time 4wd, V6 is selectable. You can put an FJ Cruiser Manual T-case in though, just have to cut a hole in the tunnel for the shifter. Trans, differentials, gears, everything else are all the same. Somebody said different gears, but that was only for the older models with the 4 speed auto. 05+ models have the A750 trans which is 5 speed and 3.73 gearing, including the automatic FJ Cruisers and Tacoma's. NOTE: You CAN find difs from Fj and taco with different gear ratio's!
So, from you advertisement I am NOT doubting your skillz brother, but is it worth it? No, not at all. IF the V8 was blown, you can get a used motor for a couple grand tops, replace all gaskets, timing belt, water pump and look everything over and have it swapped out in a weekend. You will be forever pulling all that wiring from the V6 donor, then the V8 truck, swapping new wiring in and motor, assuming motor mounts are same, and then hoping you didn't screw a wire up, including the chip key module or some stupid random thing that will completely immobilize your project and make it useless.....
In the end, no it isn't worth your time, headache or money. You save maybe 2mpg with the V6 and if you really want 2wd the V8 came in that as well. I have been very surprised at how easy these 4runners are to work on! Plenty of room overall to access stuff, simple to work on, but the little things like wiring can destroy your week!

 

[az4runner02]

Never heard of V8 issues but sure there are a few that popped a motor because of never being changed. Either way don't think he is bs'ing anyone just asking for info. Good luck with it....

 

[BlackWorksInc]

There are certain engine swaps that are worth the effort, the headache, the cost, the complexity, etc...

For instance, I'd love to see someone here swap an LS3 or LS7 into one of our SUVs.

But to take a dime a dozen V6 4.0 and swap it for a V8 4.7, that would be insanity given the limited power gains, limited novelty factor, limited rarity introduced, etc.

BLASPHEMY! BURN THE HERETIC ON THE STAKE!

Lol j/k Would be interesting to see an LS powered 4Runner, a bit heretical to me; but I can admire good craftsmanship and solid numbers.

Actually I really don't just flip the 4 runners . We just keep upgrading to the next generation when we can ! Lol. But I need 3 more for the family . My daughter In law , my girlfriend and me ! Lol. I'll prolly get one or two more 4 gen because I have parts . But we all like the newest versions! Lol

Honestly I would see if you can find out what's wrong with the engines and do a rough cost assessment for repairs, it'll be cheaper than trying to swap everything over. The most "common" (take that with a grain of salt because when you're looking at common issues on a forum you're talking about a percentage of a small fraction of the owner base) issues with the 2005+ 2UZ-FEs (4.7L V8 with VVTi) is that the camshaft seals seem to leak more easily than on the non-VVTi units (they are a bit of a pain to do compared to most other engines) and the secondary air injection on some vehicles fail due to moisture intrusion typically (someone told me there was a warranty enhancement for them now, which must have happened recently, I'm not sure but I'll have to double check).

Besides those two issues, the engine typically doesn't have any abnormal issues that aren't user induced (i.e. running a timing belt too long or somehow overheating the engine.)

 

[ChrisLovesUgly]

You might also consider just picking up a used 2UZ V8, last I checked, you can get a running one for ~$1k

 

[97hb]

Just picked up my "donor" also. I am going a little different route than you haha!

 

[BlackWorksInc]

Just picked up my "donor" also. I am going a little different route than you haha!

Best of luck on that transplant, please do a very detailed build thread if you do get it working. That's something that'd be nice to see 5.7L V8 4th Gen.

 

[t-man]

Best of luck on that transplant, please do a very detailed build thread if you do get it working. That's something that'd be nice to see 5.7L V8 4th Gen.

My life goal! Don't forget the Magnuson supercharger!

Sent from the drivers seat of my 05 4runner.

 

[Inv4drZm]

I don't care if they even get it working! Just taking a picture of that 5.7 shoved into the engine bay is enough to make me cry.

 

[duffdog]

My white parts truck with my daughters new truck

dude,:wtf:

Just fix the V8!!!! Mine exploded because I drove it underwater at full throttle and I rebuilt it myself in my backyard for $1500.

There is no good reason to put a v6 motor in there... you have to change the harness. Are you aware of the amount of hours required to change the entire electrical harness for a different harness? Its like 200+ hours, just in labor you would either be wasting time or money and definitely not come out ahead even if the engine somehow started (which it won't because there will be something wrong when you swap that many parts). Its just a bad idea from the beginning.