Gen 4 engine swap worth it?

Discussion in 'Gen 3 Prius Technical Discussion' started by butchbs1985, Oct 25, 2025 at 12:54 AM.

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  1. Mendel Leisk

    Mendel Leisk MMX GEN III

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    When you enter a zip code, the main Toyota Parts website will display dealerships near you. The link (somewhat subtle) I posted in #13 is to a US dealership website most convenient to me (just over the border in Washington State):: they're price, for the brand-new short block (which WILL have the revised pistons/rings) is $2129~ USD.

    upload_2025-10-25_14-16-10.png

    Short Block Assembly #11400-37140 | Autoparts.toyota.com
     
    #21 Mendel Leisk, Oct 25, 2025 at 5:16 PM
  2. butchbs1985

    butchbs1985 Taking things apart is fun!

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    Yeah. I figured if I'm going that route I may as well do the head assembly too so added that to my cost. This is my point of comparison. Hoping for a call back Monday from Hybridpit too
     
    #22 butchbs1985, Oct 25, 2025 at 11:07 PM
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  3. butchbs1985

    butchbs1985 Taking things apart is fun!

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    Well I didn't even bother borescoping it. Started it to move into the garage and get sweet white some so... There's for sure an issue as suspected.
     
    #23 butchbs1985, Oct 26, 2025 at 5:22 PM
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  4. Mendel Leisk

    Mendel Leisk MMX GEN III

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    As Dylan said, it don' take a weather man, to know which way the wind blows.
     
    #24 Mendel Leisk, Oct 26, 2025 at 9:06 PM
  5. George Jung

    George Jung Junior Member

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    Ive done gen 4 swap, I wouldnt say i had "no Issues", but after alot of tears everything is working good. I dont have issues with over heating. If i did it again i think i know now how to do it easily. This was the first time I ever attempted a repair like this, In fact this prius is the first car ive ever worked on, and that was just a year ago when i cleaned my egr and air intake. I think i paid like $1300 for it from lkq. I think its a good option, much simpler than buying a new block and switching over the head. Plus my engine was burning a lot of oil and i didnt know if it was the piston rings or the valves causing it.
     
    #25 George Jung, Oct 29, 2025 at 9:09 PM
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