3.4 Swaps The 3.4 V6 Toyota engine

95 4wd 3.0 5spd ifs to 3.4 starting this weekend

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Old May 18, 2008 | 01:20 PM
  #121  
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speaking of backup lights, about a year ago i was going somewhere and i noticed that my combination meter was dead, my windows had stopped working, and i don't remember what else. i figured out the "gauge" fuse was blown and swapped it with a spare. next trip everything was fine until i put it in reverse, and then same thing. so i unplugged the backup light switch and no more trouble. tested the switch; that was fine. that was when i said to myself "you don't need backup lights. just figure it out later". well, i never even tried to trace that down, but ever since i got the new engine, i've been thinking "man, it would be cool if the problem with the backup lights was in all the wiring that just got swapped out". never thinking that would actually be the case. so when i tried starting the truck last week, i left that unplugged because i wanted to know that everything else was working properly. a couple of days ago i plugged it in, turned the key to on without starting the truck, and put it in reverse. then i jumped out and went around the back and my backup lights were working! no blown fuse! just a nice little bonus...
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Old May 18, 2008 | 02:29 PM
  #122  
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Originally Posted by ozziesironmanoffroad
only reason i ask is when i rolled my truck, and swapped cabs, i had to remove the wiring harness. wasnt too hard, seems to me would be easier than splicing stuff and tracing wires.
Two completely different engine management systems, mate. The 3.0 uses an OBD I computer, where as the 3.4 uses an OBD II system. It monitors another 32 or so pieces of data.

Back of the 3.0 computer:



Back of the 3.4 computer:

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Old May 19, 2008 | 01:36 PM
  #123  
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Screamer,

I had the same issues with the passeger side motor mount. I don't recall whether I mentioned the notch I had to make for the block coolant drain, but we had a bit of a discussusion regarding the griding that I had to do to fit the A/C bracket. Apparently this only a sometimes issue, depending on what year combinations are involved. It sounded to me as though earlier 3.4s had cast motor mounts, like our original 3.0s. The later 3.4s had pressed motor mounts, that were thinner material than the cast ones.
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Old May 19, 2008 | 01:44 PM
  #124  
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Originally Posted by screamer76


i couldn't recall ever having seen this particular issue in anyone else's thread, so the only option i could see was to let the angle grinder loose on it.
Yeah I had to cut that spout off. It's for the block coolant drain, but you can still use the drain without the spout on it, you'll just have no way to catch the coolant with a hose.


Nice swap thread BTW!

Last edited by mt_goat; May 19, 2008 at 01:46 PM.
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Old May 20, 2008 | 06:05 PM
  #125  
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Originally Posted by breknraj
Screamer,

I had the same issues with the passeger side motor mount. I don't recall whether I mentioned the notch I had to make for the block coolant drain, but we had a bit of a discussusion regarding the griding that I had to do to fit the A/C bracket. Apparently this only a sometimes issue, depending on what year combinations are involved. It sounded to me as though earlier 3.4s had cast motor mounts, like our original 3.0s. The later 3.4s had pressed motor mounts, that were thinner material than the cast ones.
must have have missed that part of your post. so i'm assuming you haven't had any problems with your motor mount bracket. i was mildly worried about weakening it.
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Old May 20, 2008 | 06:08 PM
  #126  
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Originally Posted by mt_goat
.Nice swap thread BTW!
thanks, mt_goat! should have realized that was a block drain , but i probably would have still chose to grind the bracket. not that i'm expecting to have to drain the block anytime soon.
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Old May 20, 2008 | 06:24 PM
  #127  
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HOLY PASSING POWER! took the truck for it's first drive last night. i still don't have an exhaust past the small portion of downpipe that's on there, so i was turning heads everywhere i went! i almost wish i could leave it like that, but i imagine after a few days the attention would start to get on my nerves. every time i passed somebody, i stepped on it a little. and since i have no hood, my condenser fan relay cover is now MIA. lol.

i also drove it to work today since its only a couple of miles. i had to get gas on the way in, and since i was paying with cash, went into the store. when i came back out, there were these two guys pulling up to one of the pumps. when they stopped they both jumped out of their truck and went straight over to mine and just stared at the engine compartment. i walked up and they started asking me all of these questions like did i just swap it, how long did it take, etc. i had this huge grin the whole time i was pumping the gas, getting in the truck, driving away. well, okay, i've still got the grin

Last edited by screamer76; May 20, 2008 at 06:52 PM.
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Old May 20, 2008 | 06:32 PM
  #128  
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Nice to have the skinny pedal actually do something, don't ya think?
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Old May 20, 2008 | 06:45 PM
  #129  
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Originally Posted by Elvota
Nice to have the skinny pedal actually do something, don't ya think?
yeah, i can't wait until it's finshed and i can try going up the mountain. that's something i haven't done since i got the 4runner; i just didn't see the point in purposefully causing myself so much aggravation
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Old May 20, 2008 | 07:30 PM
  #130  
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Welcome to the club, Screamer!

I kinda figured that you'd like the difference!

As to the engine mount - I have had no issues with it, since it is such a beefy piece, anyway. I did make a point of making sure I had a decent radius on the notch, to be sure I didn't create a stress riser there.

Enjoy the new power, but remember with power comes responsibility!!!
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Old May 20, 2008 | 08:13 PM
  #131  
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Originally Posted by breknraj
Welcome to the club, Screamer!

I kinda figured that you'd like the difference!

As to the engine mount - I have had no issues with it, since it is such a beefy piece, anyway. I did make a point of making sure I had a decent radius on the notch, to be sure I didn't create a stress riser there.

Enjoy the new power, but remember with power comes responsibility!!!
thanks, breknraj! i wouldn't have even tried without all of you. you and mt_goat made me feel a lot more confident about having to drill out that dipstick hole. by the way, your hood scoop is beautiful!
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Old May 20, 2008 | 09:17 PM
  #132  
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Originally Posted by screamer76
HOLY PASSING POWER! took the truck for it's first drive last night. i still don't have an exhaust past the small portion of downpipe that's on there, so i was turning heads everywhere i went! i almost wish i could leave it like that, but i imagine after a few days the attention would start to get on my nerves. every time i passed somebody, i stepped on it a little. and since i have no hood, my condenser fan relay cover is now MIA. lol.

i also drove it to work today since its only a couple of miles. i had to get gas on the way in, and since i was paying with cash, went into the store. when i came back out, there were these two guys pulling up to one of the pumps. when they stopped they both jumped out of their truck and went straight over to mine and just stared at the engine compartment. i walked up and they started asking me all of these questions like did i just swap it, how long did it take, etc. i had this huge grin the whole time i was pumping the gas, getting in the truck, driving away. well, okay, i've still got the grin

Your first statement is kinda like I felt when I drove mine first. After I finished it up, less than two hours later I was making a 630 km (about 400 miles) trip back home. On an engine I had run for less than an hour by that point. I called my brother (who's house I used for my swap) and he thought I was calling to tell him it died. I drove it for 7 hours (got home at 4:30 a.m.) and slept for an hour and a half, then went to work. It has been a blast ever since.

And as for your second statement...there is a whole lotta satisfaction being able to say you swapped it yourself, isn't there? Like I've told a few people before, this swap will cost you more than just buying a newer 4Runner with the 3.4 already in it. But...there is the huge amount of pride you can take from a job like this that money simply cannot buy.

Welcome to the club. Enjoy.
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Old May 21, 2008 | 03:20 AM
  #133  
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Yeah I wouldn't mess with the motor mount bracket, just cut off that spout. The 3.0 didn't even have a spout on the drains, you'll never miss it.

Last edited by mt_goat; May 21, 2008 at 03:24 AM.
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Old May 23, 2008 | 07:51 PM
  #134  
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does anyone know if a hood from a 94 pickup will fit a 95 4runner?
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Old May 24, 2008 | 06:07 AM
  #135  
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Originally Posted by screamer76
does anyone know if a hood from a 94 pickup will fit a 95 4runner?
You can sometimes find out if a part will fit or not by looking at carpart.com and see if there is crossover on their database.

http://www.car-part.com/
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Old May 24, 2008 | 07:11 AM
  #136  
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I cant wait for my 3.0 to die so I have an excuse to get a 3.4, but being a yota and my persistence to maintain my truck that may never happen in my life time *sigh*
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Old May 24, 2008 | 07:50 AM
  #137  
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Originally Posted by 1stgen4gunner
I cant wait for my 3.0 to die so I have an excuse to get a 3.4, but being a yota and my persistence to maintain my truck that may never happen in my life time *sigh*
I waited about 2 years for mine to die but I got tired of waiting and took out a good motor. It paid off though because I was able to sell my old motor for $1000 and the guy picked it up in my driveway.
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Old May 24, 2008 | 10:58 AM
  #138  
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I agree with Mt. Goat. While I can see waiting for the 3.0 to just die, having one that runs is worth much more. Offsets the cost of the 3.4 swap considerably.

Plus, one generally can't dictate when a 3.0 is going to die. Might give up the ghost at not such a convenient place, say 300 plus miles from home.

The 3.4 is an amazing upgrade... no need to wait.
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Old May 24, 2008 | 11:46 AM
  #139  
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Originally Posted by mt_goat
You can sometimes find out if a part will fit or not by looking at carpart.com and see if there is crossover on their database.

http://www.car-part.com/
thanks mt_goat. i ended up calling toyota a little while ago, and they told me it would fit. i found a guy who's selling one for $40, and i think i'm going to get it so that i have something to cover the engine without having to cut up mine. i'm still sitting on the fence over hood scoop or body lift...
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Old May 24, 2008 | 12:01 PM
  #140  
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Originally Posted by 1stgen4gunner
I cant wait for my 3.0 to die so I have an excuse to get a 3.4, but being a yota and my persistence to maintain my truck that may never happen in my life time *sigh*
x3. i agree completely with mt_goat and elvota. start looking for an engine if you really want to do it. i sold my 3.0 for $600. i probably could have gotten more, but i didn't want to sit on it. i managed to get rid of it two days after placing the ad, and i had to turn a lot of people away after it was gone. i still have a lot of accessories to sell and my total cost to date is about $700; hopefully i can bring that down a little more by selling what's left, but i think i've done pretty well. just make sure you've got a second form of transportation worked out if it's your only one. if you really want to do it, every mile you put on your 3.0 is money out of your pocket.
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