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05 Tundra motor blown compatibility

Discussion in '1st Gen Tundras (2000-2006)' started by specter208, Mar 10, 2020.

  1. Mar 10, 2020 at 3:44 PM
    #1
    specter208

    specter208 [OP] New Member

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    need to find an engine for my 05 Tundra 4.0 V6. I want to avoid another 05 year and possibly 06 year engine. Does anyone know what model year engines from possibly Tacoma and 4Runner that are compatible, hopefully a newer engine will still run and not have the defective HG in them.
     
  2. Mar 10, 2020 at 5:01 PM
    #2
    Baller

    Baller New Member

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    I'm sorry I don't have an answer for you but, I found your post interesting. I've only ever heard people singing the praises of the 05-06 VVT-i engines over the earlier models.
     
  3. Mar 10, 2020 at 5:27 PM
    #3
    specter208

    specter208 [OP] New Member

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    05 and possibly the early 06 engines had faulty head gaskets. I want to put possibly a 2010-2011 engine from a Tacoma in the tundra if possible, much newer and less miles and less likely to have a HG issue again.
     
  4. Mar 10, 2020 at 5:41 PM
    #4
    FrenchToasty

    FrenchToasty Desert rat

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    I’ve also herd of/seen it myself, if you have to new motor out, check/repair the timing cover leak. I guess it another common but not detrimental issue the 4.0l is known for. I think it’s a sealing issue of mating surfaces between the heads and the block, on the passenger side. They all leak oil there behind the timing cover inspection plate.
     
  5. Mar 10, 2020 at 7:10 PM
    #5
    KarmaKannon

    KarmaKannon Master of None

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    People seem to sing the praises of the v8. I don't see much besides liking the mpg and timing chain on the v6.
     
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  6. Mar 10, 2020 at 7:59 PM
    #6
    MrDirtjumper

    MrDirtjumper New(ish) Member

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    I know @the_white_shadow ripped a V6 out of his donor truck and was looking to get rid of it a while back.
     
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  7. Mar 11, 2020 at 4:38 AM
    #7
    the_white_shadow

    the_white_shadow New Member

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    Yep. I still have it sitting here.
     
  8. Mar 11, 2020 at 6:31 AM
    #8
    TX-TRD1stGEN

    TX-TRD1stGEN ...

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    someone was selling one on the tacomaworld forum texas classified thread a while back...
     
  9. Mar 11, 2020 at 6:33 AM
    #9
    the_white_shadow

    the_white_shadow New Member

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    that was probably me.
     
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  10. Mar 11, 2020 at 7:25 AM
    #10
    empty_lord

    empty_lord New Member

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    Up to a 2015 Tacoma engine should work with swapping parts over. The engine itself in tacos didn’t change till 16.


    4runners I believe 10 and up won’t fit.
     
  11. Mar 11, 2020 at 12:58 PM
    #11
    specter208

    specter208 [OP] New Member

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    My concern is of electronics incompatibility. From my understanding the 03-04 4runner 4.0 had a different style VVT phaser and camshaft sensor setup, I was just want to be sure before I drop $2k on a used motor.
     
  12. Mar 11, 2020 at 1:08 PM
    #12
    empty_lord

    empty_lord New Member

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    I would avoid 06 and older. They are known to have head gasket issues. You should be safe to use a 07-15 taco motor
     
  13. Mar 11, 2020 at 1:11 PM
    #13
    specter208

    specter208 [OP] New Member

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    Thanks.
     
  14. Mar 11, 2020 at 1:21 PM
    #14
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    I had suspected, and have now confirmed through parts research for you, that the ECM for virtually every MY 4.0L engine is a unique part number. My opinion is any swap to another MY engine should anticipate needing to buy the engine and ECM/engine wiring harness from the same donor vehicle as a bundle. Compatibility of a later MY ECM with the rest of the vehicle could still be an issue.
     
    Last edited: Mar 11, 2020
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  15. Mar 11, 2020 at 2:35 PM
    #15
    specter208

    specter208 [OP] New Member

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    This is what concerns me but since the 4.0s should all be identical mechanically, shouldn’t the Tundra ecm just plug in? From my understand single VVT 05-11 Tacoma engines are all identical mechanically and can all be interchanged amongst Tacoma’s at least, and 12-15 with the SAIS can be modded to work on older trucks. What I did find was 03-04 4.0s in 4runners had older style cam phaser(tri-star) and 2 wires for the camshaft position sensor. An 07 FJ engine was put in an 04 4Runner and the engine would crank but not start. My 05 has a the newer style cam phaser with a 3-wire CPS setup, which is on 05-11 Tacoma’s.
     
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  16. Mar 11, 2020 at 4:54 PM
    #16
    KarmaKannon

    KarmaKannon Master of None

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    When I did a 3.4 swap I remember the ecms did seem to change a lot. I'm not sure that matters much with a new engine though. Couldn't you just swap all the wiring from the old engine back over? If the tb or something is different then maybe just use your old one?
     
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  17. Mar 11, 2020 at 5:06 PM
    #17
    empty_lord

    empty_lord New Member

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    Yes you use all your old parts. The engine is the same
     
  18. Mar 13, 2020 at 5:27 PM
    #18
    specter208

    specter208 [OP] New Member

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    I took the head off my engine today. There was no obvious sign of a head gasket leak, the cylinder head checked very nicely flat and no obvious cracks but the block did not pass the warpage test. Block maximum warpage is 0.0020 and I could pass a 0.0025 feeler gauge under the straight edge.

    C3DA8D27-B54A-42D7-8627-579B489AF24E.jpg
    94D60DC8-2D01-486E-9095-C67E504D3A72.jpg
    8D54E81C-31F1-403F-AD22-0F9A1BD41AAE.jpg
    E25E4097-D747-4F05-BA2C-6AC53EE23B27.jpg
     
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  19. Mar 13, 2020 at 6:43 PM
    #19
    bmf4069

    bmf4069 Yup, that's car parts in a dishwasher

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    Were you bored or what?! That's a lot of work just to check something!
     
  20. Mar 13, 2020 at 7:01 PM
    #20
    specter208

    specter208 [OP] New Member

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    I spent $50 the head-bolt driver and $85 for the precision straight edge to remove the head bolts. Can’t really return those anymore.
     
  21. Mar 13, 2020 at 7:35 PM
    #21
    bleach

    bleach Resident WISEGUY

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    Sucks about the block. I guess there's way to deck it.
     
  22. Mar 14, 2020 at 6:37 AM
    #22
    specter208

    specter208 [OP] New Member

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    Negative, service manual states to replace cylinder block if out of spec. Does not even give a spec for a resurface repair because it is not recommended. Potential timing issues could result because the angle between the crank and cams will change.
     
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  23. Mar 14, 2020 at 7:03 AM
    #23
    empty_lord

    empty_lord New Member

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    You “could” resurface. But you’ll need to run a thicker head gasket. If you don’t timing will be wrong
     
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  24. Mar 14, 2020 at 1:16 PM
    #24
    huntertn

    huntertn New Member

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    Are you sure that the surface was perfectly clean when you checked it. .0005” out of tolerance is a pretty dang small amount. I would make sure that all of the gasket material was removed and that there was no raised carbon around the edge of the cylinder holes.

    Don’t take this wrong and it may just be the picture but it does not look as clean and I would want it before I made a decision about it being out of tolerance.
     
  25. Mar 14, 2020 at 1:40 PM
    #25
    bleach

    bleach Resident WISEGUY

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    I don't think a thicker head gasket is available. I also don't think you can use two head gaskets like in the old days.
     
  26. Mar 14, 2020 at 1:42 PM
    #26
    empty_lord

    empty_lord New Member

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    No. No double gasket with modern MLS gaskets.


    I believe thicker gaskets are out there, but I may be wrong.
     
  27. Mar 14, 2020 at 6:43 PM
    #27
    specter208

    specter208 [OP] New Member

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    There are custom made head gaskets available. Those can only be made so thick though. The gasket can’t really be an extension of the combustion chamber.
     
  28. Mar 14, 2020 at 6:44 PM
    #28
    empty_lord

    empty_lord New Member

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    Minimal amount of extra gasket is fine. Machining yours would take next to nothing. But honestly I’d just locate a newer motor with lower mileage. These early 4.0s are known to have head gasket issues
     
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  29. Mar 14, 2020 at 6:49 PM
    #29
    specter208

    specter208 [OP] New Member

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    I made sure to scrape the edge of the cylinder bores for carbon. The yellow stuff is stains from oil. I can try again, but the feeler gauge goes underneath the straight edge right in between the pistons. It did not go under on the outside edges of the clunker block. I’ll
     
  30. Mar 14, 2020 at 6:50 PM
    #30
    specter208

    specter208 [OP] New Member

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    I’m already looking at motors. When I get one, I will update with photos and share with you guys.
     
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