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Engine swap

Discussion in '2nd Gen Tundras (2007-2013)' started by ol’ son, Mar 5, 2020.

  1. Mar 5, 2020 at 12:33 PM
    #1
    ol’ son

    ol’ son [OP] New Member

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    Hello, I have a 2011 tundra 4x4 with a 4.6. After 270,000 my motor has given out. I am planning on replacing the motor but now wondering if it would be possible at all to swap for the 5.7. I’m sure there are lots of considerations but don’t have a clue as to what theyd be! Any advise I can get one this would be greatly appreciated! Thanks
     
  2. Mar 5, 2020 at 12:57 PM
    #2
    Kiddnapped Tundra

    Kiddnapped Tundra New Member

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    I don't know what you are looking for or your available $$. But you could put in a Cummins R2.8?
     
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  3. Mar 5, 2020 at 5:51 PM
    #3
    ol’ son

    ol’ son [OP] New Member

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    Wow! Looked it up... Didn’t know that was a thing! Pretty cool stuff but i’m trying to keep it under 5k so i’m DIYing this deal, just going to keep weighing options between the original 4.6 or going with 5.7 if thats even possible. I’m just trying to get my beta up!
     
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  4. Mar 6, 2020 at 4:17 AM
    #4
    Dr_Al

    Dr_Al New Member

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    I would think the motor and transmission would cost you more than $5k alone. With that much mileage I think it would make sense to just sell yours for parts and try to find one that has the engine you want with lower mileage.
     
  5. Mar 6, 2020 at 8:52 AM
    #5
    FWD Tundra

    FWD Tundra New Member

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    With all the money you would spend on that project you could buy another truck with the 5.7. Unless you just like projects:burnrubber:
     
  6. Mar 6, 2020 at 10:53 AM
    #6
    frichco228

    frichco228 Valued Member

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    You would be better off $ buying a truck with a 5.7 vs trying to swap in one into yours.

    I am an old muscle car guy, been around plenty of engine swaps and there is much more to it than the engine, especially with the electronics, sensors and all now.
     
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  7. Mar 6, 2020 at 11:03 AM
    #7
    ViktorG

    ViktorG Lexus/Toyota Master Tech

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    You would need to replace the engine, transmission, transfer case, ECM, engine wiring harness, 4WD ECU, and a bunch of electronic rewiring.
    Not worth the money and time.
     
  8. Mar 6, 2020 at 12:36 PM
    #8
    Tundra_power

    Tundra_power New Member

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    Im wondering how did it give out? Did it Blow a piston or rod? 270,000 is not much on a Toyota.
     
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  9. Mar 7, 2020 at 9:35 AM
    #9
    Bergmen

    Bergmen New Member

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    Latest version of the 5.7 is rated at 381 hp (earlier version had 371 IIRC). The 4.6 is rated at 310 hp so only a 71 hp difference.

    I would be surprised if there are differences in the drive train from the bell housing back. I believe I have read that the tranny, etc. is the same for both 4.6 and 5.7 models but I am not certain.

    Dan
     
  10. Mar 7, 2020 at 9:38 AM
    #10
    Black Wolf

    Black Wolf Where's my popcorn salt? Damnit

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    My 07's 5.7 was rated at 381. Same as now.
     
  11. Mar 7, 2020 at 9:39 AM
    #11
    68 RS/SS

    68 RS/SS New Member

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  12. Mar 7, 2020 at 11:32 AM
    #12
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    The transmissions are actually different, probably reflecting higher torque of the 5.7L. AB60E/F is used for the 5.7L, A760E/F is used for the 4.6L.
     
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  13. Mar 7, 2020 at 4:55 PM
    #13
    Bergmen

    Bergmen New Member

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    Interesting, thanks! I stand corrected.

    Dan
     
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  14. Mar 7, 2020 at 4:56 PM
    #14
    Bergmen

    Bergmen New Member

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    Good to know, thanks for the correction.

    Lots of knowledgeable Toyota folks here.

    Dan
     
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  15. Mar 7, 2020 at 6:45 PM
    #15
    BENWALES

    BENWALES New Member

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    Honestly, it might work. The 4.6 is literally the same engine as the 5.7 just smaller. It might require swapping injectors or a tune. I’m not taking the risk with my wallet, but if the OP is gonna be the guinea pig he could be a hero for the 4.6 guys and gals.
     
  16. Mar 8, 2020 at 11:03 AM
    #16
    FWD Tundra

    FWD Tundra New Member

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    So if it is smaller then what is the same?
     
  17. Mar 8, 2020 at 11:32 AM
    #17
    Hbjeff

    Hbjeff New Member

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    I believe it is the same block just the cyl holes are smaller. Youd have to compare the stroke for both motors, either the cyl is narrower or the stroke is shorter for the lower displacement.

    The trans are different as mentioned, as well as the rear axle. 9.5 is used on 4.6 trucks, the 5.7 trucks get a 10.5 ring gear.

    It would only be a worthwhile swap if you got a good motor/trans/driveshaft/axle out of a wrecked truck. Otherwise you are replacing your good trans/rear end in order to replace the motor. Extra expense that otherwise isn’t needed. Oh yeah, and you’d have to replace the front diff too if you ungraded to the 10.5 rear end, different gear ratios
     
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  18. Mar 8, 2020 at 12:05 PM
    #18
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    I thought the bore diameter was the same, i.e. 3UR a stroked version of the predecessor 1UR. Actually, bore and stroke are both different, with greatest difference being in the bore diameter. Also, note slight difference in compression ratio:

    1UR-FE: 87.5mm bore X 82.5mm stroke, 10.5:1 compression ratio
    3UR-FE: 94.0mm bore X 83.0mm stroke, 10.2:1 compression ratio
     
  19. Mar 8, 2020 at 12:22 PM
    #19
    Hbjeff

    Hbjeff New Member

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    The 4.6 is the same overall engine design as the 5.7 just less displacement
     
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  20. Mar 8, 2020 at 12:28 PM
    #20
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    Mmm-hmmm...Could maybe even say they are "externally identical". :D
     
  21. Mar 8, 2020 at 9:47 PM
    #21
    Nick T

    Nick T New Member

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    All UR engines have 94.0mm bore the 4.6, 5.0, and 5.7 have different strokes. 87.5x82.5 is the 1UZ 4.0 specs
    The 4.6 also has a lower deck height vs the 5.7 so things like headers aka exhaust manifolds don't easily swap over.
    It is much more cost effective to sell your 4.6 truck and buy a 5.7
    For all the labor involved and electronics in swapping a 4.6 to a 5.7 might as well swap a lsx in it.
     
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  22. Mar 8, 2020 at 10:24 PM
    #22
    Winning8

    Winning8 New Member

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    I'll just find a used 4.6 to swap out engine. sell it and find a 5.7
     
  23. Mar 9, 2020 at 12:21 AM
    #23
    FWD Tundra

    FWD Tundra New Member

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    This sounds like the best plan yet. I would not waste any time with a 5.7 change.
     
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  24. Mar 9, 2020 at 5:45 AM
    #24
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    You are correct, my browser history says so. Be careful what you "click" for on the internet. Thanks for the correction. :thumbsup:
     

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