2014 Prius head gasket ?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Frank Ashe, Aug 11, 2025 at 3:08 PM.

  1. Frank Ashe

    Frank Ashe New Member

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    I’ve heard some where that the 2015…..was changed and does not have oil consumption and head gasket problem that the other gen3’s have …does anyone know if this is true ?
     
    #1 Frank Ashe, Aug 11, 2025 at 3:08 PM
  2. douglasjre

    douglasjre Senior Member

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    Has the upgraded piston and rings but I can't speak for the head gasket. Why deal with it
     
    #2 douglasjre, Aug 12, 2025 at 12:44 AM
  3. Mendel Leisk

    Mendel Leisk MMX GEN III

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    Partway through model year 2014 Toyota revised the pistons and rings. This has hopefully reduced oil consumption issues.

    At some point the EGR system had a revision to the valve component, and there was a software tweak as well. There was also an intake manifold change, or changes.

    I doubt any of that had much if any effect on the head gasket failures.

    Appreciable improvement came with gen 4, with its completely revamped EGR system.

    however early 4th gen years were prone to coolant leaks in the exhaust heat recovery system, which if left unattended long enough could also cause head gasket failure.
     
    #3 Mendel Leisk, Aug 12, 2025 at 9:41 AM
    Last edited: Aug 12, 2025 at 9:55 AM
  4. ETC(SS)

    ETC(SS) The OTHER One Percenter.....

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    #4 ETC(SS), Aug 12, 2025 at 10:57 AM
  5. bisco

    bisco cookie crumbler

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    take a peek inside the egr tube to see how much junk is in there, and if it needs to be cleaned.
    haven't read about too many 2015 head gaskets if any, but only time will tell.
    still, it has much better engineering than older gen 3
     
    #5 bisco, Aug 12, 2025 at 1:47 PM
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