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7x Series Minor and Major Changes

Discussion in '70-Series Tech' started by beno, May 17, 2018 at 7:34 AM.

  1. beno

    beno Gihee Arakawa Moderator GOLD Star

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    Useful specification information and has exact dates for all changes to the 7x from 1984 through current.

    This information should put to bed many things that are "unknown" or consistently discussed incorrectly here.

    The information here is directly from the proverbial "horse's mouth." First portion is the Chief Engineer's design concepts as well as working parameters for the development of the next generation 40 series (which is basically what the 70 series was when it was introduced).

    The information below includes all heavy duty as well as medium/light duty 7x models for the JDM as well as export markets.

    fullsizeoutput_52cb.jpeg fullsizeoutput_52ce.jpeg fullsizeoutput_52cc.jpeg fullsizeoutput_52cd.jpeg fullsizeoutput_52cf.jpeg
     
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  2. beno

    beno Gihee Arakawa Moderator GOLD Star

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    As I've stated many times about why Toyota changes things: it's either all about weight savings (thus improved fuel economy) or cost savings. That's it. Every interview I have read with the 3 Chief Engineers about the 7x have stated that everything is about fuel economy and lower overall development, production and after sales support costs.
     
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  3. cruiserjunktion

    cruiserjunktion Cruiserjunktion@gmail.com Supporting Vendor GOLD Star

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  4. beno

    beno Gihee Arakawa Moderator GOLD Star

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    I don't know. I'm still waiting for that mod.

    :lol:
     
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  5. Gun Runner 5

    Gun Runner 5 KI4CMQ SILVER Star

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    (thus improved fuel economy) .......

    Let's see, years ago the fuel economy of a Land Cruiser sucked. Today the fuel economy of a Land Cruiser sucks.
    Perhaps Toyota needs to revisit that portion of their mission statement. :)
     
  6. Mookies

    Mookies

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    Incremental gains is the name of that game! I can't wait for a diesel electric hybrid 70 series.

    Also, interesting to see the 1PZ was used until 94.....and I'm really glad the "rustproof steel" that rusted around my windshield was replaced:hmm:
     
  7. beno

    beno Gihee Arakawa Moderator GOLD Star

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    Speed limits and driving habits and patterns were significantly different in 1984 vs 2018.
     
  8. Gun Runner 5

    Gun Runner 5 KI4CMQ SILVER Star

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    In 1985 a Land Cruiser most likely averaged 12-15 mpg while unleaded gasoline averaged about $1.12-$1.15 per gallon.
    Today a Land Cruiser averages about the same fuel economy while unleaded gasoline is in the $2.80ish range.
    So in 33 years the average increased by a value of zero and yes I realize Toyota isn't alone in the criteria and I'm only referring to the U.S. market.
     
    Last edited: May 17, 2018 at 1:29 PM
  9. TonyP

    TonyP GOLD Star

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    But $1.12 in 1985 dollars is $2.74 is 2018 dollars
     
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  10. FJ73Texas

    FJ73Texas

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    Speaking from a US perspective only, A LC today has a 5.7L....in 1985...it was what? 2F 6-banger?.....
     
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  11. FJ73Texas

    FJ73Texas

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    The 1PZ sure did have a short production run. Makes finding any 1PZ specific parts rather difficult sadly.
     
  12. Gun Runner 5

    Gun Runner 5 KI4CMQ SILVER Star

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    Does the 1PZ and the 1HZ not have a lot of parts in common?
     
  13. FJ73Texas

    FJ73Texas

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    "a lot" depends on the person you are asking I guess...but in my opinion I don't think so. I don't have enough exposure to a 1HZ to make that call though.
     
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  14. r083rt

    r083rt

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    I could be wrong...but I think the crankshaft, camshaft, valve cover, oil pan are all interchangeable.
     
  15. Locked79

    Locked79 SILVER Star

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    None of those are interchangeable
     
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  16. Mookies

    Mookies

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    Correct. None of the "spin-ey parts" are interchangeable but the accessories, individual valve train and timing components are the same. In my short ownership I've been able to find everything needed easily.
     
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  17. r083rt

    r083rt

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    I see the sarcasm was lost through the internet.
     
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  18. roscoFJ73

    roscoFJ73

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    Toyota likes Australia.
    I remember when the 75 series first come out, it got rave reviews as far as comfort, but the lack of power for the diesels was still a let down. If only they had got the 12HT.
     
  19. roscoFJ73

    roscoFJ73

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    Not the important stuff thats related to engine length. Engines Australia sell pistons , rings, and bearing individually, so you can still get a PZ rebuild kit without having to buy a 1HZ kit
     
  20. Gun Runner 5

    Gun Runner 5 KI4CMQ SILVER Star

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    Please don't alter my otherwise entertaining post with facts or logic. :)
     
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