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3.4 V6 Engine Swap to 4.0

Discussion in '1st Gen Tundras (2000-2006)' started by Soobsr, Nov 7, 2017.

  1. Nov 7, 2017 at 10:38 AM
    #1
    Soobsr

    Soobsr [OP] New Member

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    Hi, I'm new. I bought a 2003 Regular cab 3.4 auto Tundra and love that thing. It only had 75K on it I when I got it about 4 months ago and the truck looks like it came out of a time warp, basically a cherry. I immediately renewed the oil, oil filter, rear axle lube, fuel filter, air filter, timing belt and idlers, accessory belts, water pump, fan bracket bearing, thermostat, plug wires, and plugs. It runs like a Rolls although it ran fine before but there's nothing like knowing what you have in my opinion.
    I want to keep the truck but the motor is a bit anemic for me and I don't want to start hopping it up when I read the 2014 4.0 v6 put out 270hp. let's face it, even with the supercharger, uprated injectors and headers you're not going to make that power using a reasonable/reliable boost. Also, if I had that kind of power up front there'd be room for more gains. I can also feel the benefit that the 5 speed auto would have whilst driving my 4spd. The gas mileage is improved as a bonus.
    So, basically I want to do a 2014 Tundra v6 motor and tranny transplant into my cherry 2003.
    How did the 2014 4.0 v6 have 270hp when the earlier 4.0 had 236hp? Are they different engines?
    What fits up? and what doesn't? Please tell me anything you know, or if someone's done this swap. Thanks.
     
    Last edited: Nov 7, 2017
  2. Nov 7, 2017 at 10:41 AM
    #2
    Danimal86

    Danimal86 What's a Dickfir?

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  3. Nov 7, 2017 at 10:50 AM
    #3
    Soobsr

    Soobsr [OP] New Member

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    Very helpful and illuminating, many thanks!
     
  4. Nov 7, 2017 at 11:12 AM
    #4
    COMiamiFan

    COMiamiFan SSEM #3. Don't forget to try the search bar.

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    Welcome from CO.
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  5. Nov 7, 2017 at 6:03 PM
    #5
    Scpringle

    Scpringle New Member

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    seems like a lot of $$$ for a bigger V6. You may want to drive it and find a v8 tundra later. The 1st gen are getting very reasonable on the used market . I had a 02 4runner with the 3.4L and it had two buttons pwr and ECT that were supposed to give you more power ( I am sure it was better throttle response and better shift points ) does yours have the "go" buttons ?
     
    Last edited: Nov 7, 2017
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  6. Nov 7, 2017 at 6:10 PM
    #6
    PRO BLANCO

    PRO BLANCO Dirt biking & fishing

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  7. Nov 7, 2017 at 8:04 PM
    #7
    831Tun

    831Tun crazy Bastrd

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    Didn't the 1st gens have a V8 option? That might be a simpler route. Still, it's only 245hp but has more torque than the 270hp V6..
     
  8. Nov 7, 2017 at 9:01 PM
    #8
    big_jarv

    big_jarv New Member

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    If you're gonna do a swap may as well drop a v8 in it.

    In regards to the 4.0 I believe it's just tuned different which is where the difference in hp comes from.
     
  9. Nov 7, 2017 at 9:51 PM
    #9
    ColoMtnMan

    ColoMtnMan New Member

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    I'd have to agree with big_jarv. Here in Colorado there are a fair number of the 4.7 v8's available from vehicles parting out, some with reasonably low miles.. I believe you can even upgrade to the 2005 4.7 which was 282 hp, up from 245. It dropped to 271 for 2006 but still good. The horsepower increase in 2005 was due to the addition of variable valve timing which they call a VVTI engine. The auto tranny went from 4 speed overdrive to a 5 speed overdrive in 2005 so if you could get an engine and tranny from 2005 or 2006 you'd get those added benefits. I'd ask specifically about that swap on this forum to see if anyone has done it and knows about any complications. Good luck.
     
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  10. Nov 8, 2017 at 4:28 AM
    #10
    Wynnded

    Wynnded What MPG...

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    There's not a lot of that happening on this site. What @ColoMtnMan suggests is really good info. Another thing to consider would to be to keep an eye out for a totaled (body-wise) Tundra with the engine/trans you want so that you'd have access to all the ECUs and wiring harnesses that you'd likely need.
     
  11. Nov 8, 2017 at 5:03 AM
    #11
    Soobsr

    Soobsr [OP] New Member

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    Many thanks for everyone's input but I have to disagree with "The 1st gen are getting very reasonable on the used market" statement because I search regularly for 2005 and 2006's and let me tell you (for those that don't already know) a clean low mileage example brings a PREMIUM price for 12 to 13 year old truck! Enough people know that the build quality on the 1st Gen Tundras was exemplary and thus the used market prices reflect it. I should also add that I bought a new 2001 v8 Tundra SR5, kept it for 10 years and in that time spent $270 in repairs (an O2 sensor). Now, I did all the maintenance myself (although I was a bit late on the timing belt at 95K) then sold it to my brother in law at 190K (way too cheap, but it's family) who has it up to 350K presently. He had to change the tranny at about 250K but he has a lawn care business and tows a tandem axle trailer loaded down with equipment, I told him to turn off the overdrive when he towed but he never did and I'm convinced that's what got the tranny. He's turned the overdrive off ever since and now has about 100K on the 120K used (220K total presently) tranny he's running. I can't get him to change the timing belt, he seems to think there's something magical about the truck although I constantly tell him he's living on borrowed time with about 160K on the belt! I know first hand how well the 1st Gens were engineered, manufactured and assembled. I might also add that I immediately went out and bought a new 2011 Tundra v8 that was a dismal experience reliability wise, but that's another story tarnishing my faith in the 2nd Gen Tundras.
     
  12. Nov 8, 2017 at 8:48 AM
    #12
    kenomouth64

    kenomouth64 New Member

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    Hold the Line! If you are not holding the line, abandon your ship. Destruction is inevitable without more to hold the line!
    Which V8? What were some of the issues you had? I have not had any issues other than preventative maintenance on my 2007.

    You can get a non-vvt-i for $2500, given it has high miles. The 2005-2006 do fetch a premium. Same thing goes for the V8 4runners of those years.

    https://oklahomacity.craigslist.org/cto/d/2001-toyota-tundra-sr5/6378264469.html
     
  13. Nov 8, 2017 at 8:57 AM
    #13
    kenomouth64

    kenomouth64 New Member

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    Hold the Line! If you are not holding the line, abandon your ship. Destruction is inevitable without more to hold the line!
    They are indeed different motors. Dual vvti vs single.

    https://en.wikipedia.org/wiki/Toyota_GR_engine#1GR-FE

    1GR-FE[edit]
    [​IMG]
    1GR-FE 4.0 L V6 from a 2007 Toyota FJ Cruiser
    The 1GR-FE is the 4.0 L (3956 cc) version, designed for longitudinal mounting in RWD and 4WD pickup applications. It has a 94 mm bore and a stroke of 95 mm. Output is 236 hp (176 kW) at 5200 rpm with 266 lb·ft (361 N·m) of torque at 4000 rpm on 87 octane, and 239 hp (178 kW) at 5200 rpm with 278 lb·ft (377 N·m) at 3700 rpm on 91 octane. This engine features Toyota's VVT-i, variable valve timing system on the intake cam and a compression ratio of 10.0:1. Service weight, including fluids, is 166 kg (366 lb).

    An updated version of this engine features Dual VVT-i, increasing output to 270 hp (201 kW) at 5600 rpm and 278 lb·ft (377 N·m) at 4400 rpm on 87 octane and 285 hp (213 kW) and 289 lb·ft (392 N·m) on 91 octane.[citation needed] Inside, the 1GR uses a "taper-squish" combustion chamber design with matching pistons to improve anti-knocking and engine performance, while also improving intake and fuel efficiency. Toyota adopted a siamese-type intake port, which reduces the surface area of the port walls and prevents fuel from adhering to such walls. This engine has special cast-iron cylinder liners cast into the block, which are a spiny type to improve adhesion between the liner and cylinder block. With these special thin liners it is impossible to bore the block. In the event of cylinder wall damage (scoring, deep protrusions, etc.), the entire cylinder block must be replaced. For increased block rigidity, the 1GR also receives a high temperature plastic insulator/protector, which fills the empty space between the outer portion of the cylinders and block material common to open deck engines. For increased cooling efficiency, the 1GR employs water passages between the bores of the engine. There are two such passages for each bank for a total of four. This reduces cylinder hot-spotting and keeps combustion chamber temperatures more uniform.

    A bolt-on TRD supercharger kit was available on the Tacoma and FJ Cruiser but has been discontinued by Toyota.

    The new 2015 Toyota HiLux receives a slightly different version of the single VVT-i engine, with the only change being a removal of an air intake baffle tank being replaced by a conventional air filter housing to intake pipe to surge tank style. The new intake pipe now contains resonators. Power output is unchanged.
     
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  14. Nov 8, 2017 at 11:28 AM
    #14
    ColoMtnMan

    ColoMtnMan New Member

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    A 2 cents on the 1st generation tranny issues. I just sold my 2000 sr5 4.7 4x4 with 263k. Original tyranny never had any issues. It was my remodel truck usually filled with tools. I got a power flush done every 30k starting at 60k. I aquired the truck at 30k in 2003. Just sharing as i wonder if the flushes might have been the ticket to long life. A guy from Albuquerque drove up here to Colorado Springs, bought it and towed his car all the way home, no issues.
     
  15. Nov 27, 2017 at 12:08 AM
    #15
    36tacundra

    36tacundra New Member

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    I got a roll over 2006 for 1100.00 and sold parts I did not need for 1250.00. Now I have all the power I need, but I would tear it all down for a supercharger. LOL 06 tundra 1st picture.jpg jeep.jpg So I put the engine out of the wreak in this Tacoma. I call it A 36 Toyota Tacundra!
     
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