I've searched, nothing fully answered my question.

The 3.4 swap for my '91 SR5 4Runner will be started as soon as I find a 3.4 motor. My question is should I order a used motor that has been imported from Japan for $1700, and then buy all the other needed items. Or, should I try and find a totaled truck equipped with a 3.4? I was thinking I could find a T100 or something that has been rolled or that has rear-end damage for around $2000, and I'd have all the needed parts there. Which is the easiest and cheapest way to go about getting this motor? Thanks.

 

from everything i've read about 3.4L swaps, you're better off finding a complete donor vehicle. that way you have everything you need (ECU, sensors, etc.). it will save you time & headaches in the long run. just think of how much searching you will have to do to get all the parts separately. get a 4x4 donor w/ the same type of tranny you have (manual vs. auto) and you're set.

 

ive got a complete 3.4l drivetrain for 1200$ with all sensors and wiring harness

https://www.yotatech.com/forums/f180/parting-out-96-xcab-4x4-v6-mt-87324/

 

Thanks for your offer, but I think I'm going to try and find a wrecked car that is local.


Does anyone know which model will have the parts that fit best into my 4runner. Or will any model that carries a 3.4L be fine...

 

check b&r autowrecking i know theres few 4runners that have been rolled im sure you could make a deal with them

 

Alright I need to get something straight... If I were to buy the 3.4 motor from a wrecking yard, it comes with the ECU, the Distributor, and the Alternator... Which kit would I need to buy from http://www.offroadsolutions.com/prod...e_upgrades.htm to have all the needed parts for the conversion? I'll worry about the exhaust later.

 

Your best calling ORS and talking to them directly. If your hard pressed to find a doner vehicle I could sell you my rolled '98 Auto 4x4 for $3000. I'm at the point where I need to clear a parking spot in my driveway although I don't really want to sell it. I have fun taking her camping in the hills and I don't have to worry about scratching the paint. It has 88,000 miles, current registration, clear title, drives perfectly, street legal, smogged.

 

Yeah I'll have to give them a call tomorrow but I'm sure they are going to widely stretch the truth so I buy their kit even though I may not have to. My 4runner is a manual transmission, thanks though.

 

A complete donor vehicle would be the best deal as you would have everything you need. However, this isn't very practical, may lead to angry wife syndrome, and your neighbors may call you a douchebag.

The next best thing to do is find the motor with complete engine wiring harness, ECU and other related stuff from a manual transmission T100, Taco or 4runner. Again, may not be possible to get all of the parts at the same time. Just make sure your ECU is for a manual transmission vehicle and that the engine wiring harness matches it correctly (don't try to mix up engine wiring harnesses or ECU's!) You could get the ECU and engine harness from one place and find an engine elsewhere; just make sure your injectors match the ECU style-

95.5-98 3.4 V6's use the early style injector(blue)
99-2003 3.4 V6's use the late style injector (maroon)

In addition to the engine w/correct injectors and MT ECU w/correct MT harness, you will need a MAF and intake pipe 95.5-98 (early) or 99 and up (late), an EVAP canister, power steering pump, alternator, A/C compressor, flywheel, clutch and disc, O2 sensor, + A/F ratio sensor in 99 and up. All this stuff adds up so it's best to get it all in one shot- I had to piece stuff together and little things like a MAF, intake pipe, O2 sensor and A/F ratio sensor all add up really quick.

You will use some parts from your 3.0 so don't throw anything out until you're finished!

This is not a complete list; rather it's a good overview of things you will need. In addition to the above, you will need to build or pay someone to build you a conversion harness and build an exhaust system. Even with ORS's cool crossover pipe you'll still need to do some exhaust work. It would be best to do the whole system in 2.5" IMHO.

Contrary to what some may say, you don't need the donor vehicle; none of the body wiring is needed to perform the transplant. The only body wiring you would want is the OBDII plug and associated 4 wires but this can be grabbed from any 96 or newer vehicle- I used one from a Camry.

In terms of motors, they're all physically the same except the early (pre 99) ones have a hole correctly oriented for your dipstick & tube (you'll need one from a 2wd T100) ; the late ones will require drilling a hole. (per Mike @ ORS)

It is 'rumored' that the late style 3.4 automatics have no hole drilled in the crank; I don't believe this is true and as this would produce a bastard part from a manufacturing standpoint. (how would it be chucked into a lathe??)

The 99 and up ECU's are better for supercharging; earlier ECU's are lacking in the fuel control dept when S/C'd. (This is nullified by installing the URD fuel management kit in early ECU's)

Avoid an ECU with the drive by wire throttle and also the theft deterrent specially keyed units (found in the 01 and up Runner's from what I've heard)

This is not a cheap conversion but it's worth it in reliability, horsepower, gas mileage and bling factor Nothing says cool like smoking a new V8 Mustang in your supercharged V6 4Runner on the way to the trails

 

Wow, thank you very much for your information. I think I'm going to find a donor vehicle at a local wrecking yard that I can keep going back to and rip parts off of if they want too much for the whole vehicle. Thanks a lot.

 

I just noticed that I left something out- the donor vehicle wiring contains several plugs that attach the ECU to the body wiring... You'll need these for sure. Try to get at least 6 inches of wire on them when they're cut from the donor harness...