Introduction To Roth Automotive Science › Forums › Engine › pre-cat failure

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  • January 18, 2020 at 2:09 am #317
    theory816
    Participant

    With problems like these, how were they eventually resolved?

    • This reply was modified 5 years, 3 months ago by theory816.
    January 18, 2020 at 8:35 am #319
    admin
    Keymaster

    Improved piston design

    January 18, 2020 at 11:37 pm #320
    theory816
    Participant

    What I meant is, who takes the major hit of warranty work?

    January 19, 2020 at 10:38 am #322
    admin
    Keymaster

    I do not understand the question: warranty cost is incurred by the OEM by definition. Most pre-cat failures occur after the warranty period on old vehicles

    May 7, 2021 at 12:44 pm #468
    admin
    Keymaster

    I should probably add that any droplets of oil (even really tiny ones) that get into the combustion chamber are likely to cause preignition/knock at moderate to high loads.

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