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Which is a stronger, 3.4 or 4.0?

Discussion in 'Performance and Tuning' started by LukeBo4x4, Jun 13, 2013.

?

3.4 or 4.0

Poll closed Jun 13, 2014.
  1. 3.4

    21.8%
  2. 4.0

    78.2%
  1. Jun 13, 2013 at 10:28 PM
    #41
    NW4RUNNER

    NW4RUNNER Well-Known Member

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    3.4 can squat more but the 4.0 has higher bench press hands down.
     
  2. Jun 13, 2013 at 11:45 PM
    #42
    AWilson013

    AWilson013 Well-Known Member

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    By that logic the 3.4 is more powerful and durable. ;)

    I heard the 4.0 can do 100 pull ups though (kipping). By today's logic, that's the strongest. :rolleyes:
     
  3. Jun 13, 2013 at 11:57 PM
    #43
    dph473

    dph473 Active Member

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    Man, you brung it back old school, I remember the 22RE, loved that motor, ran forever...I'll still see one today rolling around and brings me back to high school days.

    That's very promising and good to know. I'm hoping to make mine last till the wheels fall off.
     
  4. Jun 14, 2013 at 4:42 AM
    #44
    yota243

    yota243 Well-Known Member

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    ah that makes more sense, thanks for clarifying i was dislexically reading it i guess.
     
  5. Jun 14, 2013 at 7:14 AM
    #45
    taco206

    taco206 Well-Known Member

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    2JZ-GE and GTE are belt driven. So I guess a 4.0 is "stronger and more durable" than the GE and GTE too. But the 4.0 is a good unit, my brother in law has 215k on his 03 4runner V6 and it runs great and pulls hard.
     
  6. Jun 14, 2013 at 8:45 AM
    #46
    JDMcQ

    JDMcQ Well-Known Member

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    2UZ-FE 4.7 V8 FTW.

    :cool:
     
    Last edited: Jun 14, 2013
  7. Jun 14, 2013 at 8:46 AM
    #47
    tooter

    tooter play every day

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    If the belt snapped, some of the valves would remain in the open position while the pistons would continue to go up and down, smashing into the valves that weren't closed, bending them.

    [​IMG]

    The same damage would occur whether it was a chain or a belt failure.
     
    Last edited: Jun 14, 2013
  8. Jun 14, 2013 at 8:49 AM
    #48
    JDMcQ

    JDMcQ Well-Known Member

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    The 3.4 is a non-interference design. There will be no collision of valves/pistons.
     
  9. Jun 14, 2013 at 10:05 AM
    #49
    BamaToy1997

    BamaToy1997 ASE Master Tech Vendor

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    As mentioned above, the 3.4 is not an interference engine, so even if the valves were stuck fully open, the piston would never come into contact with it. Thus no damage.
     
  10. Jun 14, 2013 at 11:02 AM
    #50
    Gincoma

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    yeah I mean timing

    Its easier to break a belt then chain, overall both are good motors I would be happy with
     
  11. Jun 14, 2013 at 12:03 PM
    #51
    650H1

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  12. Jun 14, 2013 at 12:12 PM
    #52
    mattgecko

    mattgecko The Lighting guy

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  13. Jun 14, 2013 at 1:32 PM
    #53
    Krazie Sj

    Krazie Sj Resident Jackass

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    Driven both. More impressed with the 4.0.
     
  14. Jun 14, 2013 at 2:32 PM
    #54
    tooter

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    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.
    Ah, that's good designing. :)
    They planned in advance for the contingency of snapped belts.
     
  15. Jun 14, 2013 at 3:34 PM
    #55
    LukeBo4x4

    LukeBo4x4 [OP] The more people I meet, the more I like my dogs.

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    very tough moter for sure.
     
  16. Jun 15, 2013 at 1:58 PM
    #56
    Torspd

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    3.4 is stronger all the way around. Might not be as efficient as the 4.0, thus the lower power output, but it is definitely an engine that was build with strength and durability in mind.

    Iron block, closed deck is a good starting point.

    4.0, is all aluminum, open decked with sleeve liners. Powder cast steel rods, and weak ring-lands.

    2rz,3rz,5vz > 1GR
     
  17. Jun 15, 2013 at 2:18 PM
    #57
    max2

    max2 Well-Known Member

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    There's no replacement for cubic inch displacement.
     
  18. Jun 15, 2013 at 5:59 PM
    #58
    LukeBo4x4

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  19. Jun 15, 2013 at 6:15 PM
    #59
    taco terror

    taco terror got 5VZFE?

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    I have always wondered what non-interference meant exactly, or how it works. Does it mean that when a piston is at TDC and a valve is stuck open it wont touch it?
     
  20. Jun 15, 2013 at 6:34 PM
    #60
    RadTaco914

    RadTaco914 MALLIN'CRAWLIN'

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    Always heard of the 3.4 having head gasket issues.. Driven both and own a 4.0 and their both dang good engines period. Just the 4.0 is much more efficient and less maintenance imo..regardless its still a TOYOTA :D
     
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