Lexus HS250h Engine question

Discussion in 'Lexus Hybrids and EVs' started by Bill the Engineer, Nov 27, 2013.

  1. Bill the Engineer

    Bill the Engineer Senior Member

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    Is the 2.4 L engine in the now discontinued hybrid Lexus HS250h just a bored-out Gen III Prius 2.0 L engine? Are they interchangeable?

    Bill the Engineer
     
    #1 Bill the Engineer, Nov 27, 2013
  2. xpcman

    xpcman Senior Member

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    No. It uses the same engine as the 2007-2010 Camry Hybrid the 2AZ-FXE
     
    #2 xpcman, Nov 27, 2013
  3. JimboPalmer

    JimboPalmer Tsar of all the Rushers

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    #3 JimboPalmer, Nov 27, 2013
  4. xliderider

    xliderider Senior Member

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    I always thought the Prius v would've been better with the 2.5L AZ engine, but apparently, the engineers at Toyota disagreed.

    SCH-I535
     
    #4 xliderider, Nov 27, 2013
  5. Tideland Prius

    Tideland Prius Moderator of the North
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    Possibly weight/packaging issue. I too think it could benefit from the larger engine - more torque, similar FE.
     
    #5 Tideland Prius, Nov 27, 2013
  6. JimboPalmer

    JimboPalmer Tsar of all the Rushers

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    I wish my v had the Gen 3 final gear ratio to get some mileage back, but those same engineers thought a v that slow would not sell well.

    (It will be interesting to see if any actual v owners wanted a bigger engine)
     
    #6 JimboPalmer, Nov 27, 2013
  7. orenji

    orenji Senior Member

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    The Prius engine is pretty much maintenance free compared to a normal gas motor. Is the HS motor the same? Are there no belts to change?
     
    #7 orenji, Jan 10, 2015
  8. Tideland Prius

    Tideland Prius Moderator of the North
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    No, it is not a beltless engine. It's based on the Gen 1 TCH's hybrid system with the 2AZ-FXE 2.4 litre engine setup.
     
    #8 Tideland Prius, Jan 10, 2015
  9. orenji

    orenji Senior Member

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    Thanks for the reply, so are there timing belts on these engines and if so, are they interference free?
     
    #9 orenji, Jan 10, 2015
  10. Tideland Prius

    Tideland Prius Moderator of the North
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    Interference-free? I don't know what that is. Hopefully someone else can answer that.
     
    #10 Tideland Prius, Jan 10, 2015
  11. orenji

    orenji Senior Member

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    If they have a timing belt? and if the timing belt snaps, will engine valves be harmed?
     
    #11 orenji, Jan 10, 2015
  12. Tideland Prius

    Tideland Prius Moderator of the North
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    I can't remember if it's a belt or a chain, sorry!
     
    #12 Tideland Prius, Jan 10, 2015
  13. orenji

    orenji Senior Member

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    I just looked up this engine on line and it seems to be using a roller chain, so it would appear it has no timing belt.
     
    #13 orenji, Jan 10, 2015
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