2015 w unclogged egr pipe at 115K miles

Discussion in 'Gen 3 Prius Main Forum' started by pidginbil, Jan 28, 2026.

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  1. CR94

    CR94 Senior Member

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    As far as I've seen, evidence is scant that the EGR system's deficiencies cause engine overheating. Clogging of EGR, especially if unequal between cylinders, might, just maybe, cause momentarily abnormal cylinder pressure that overstresses the head gasket.

    I'd put more money on thermal gradients and thermal cycling, though, as the culprits.
     
    #41 CR94, Feb 20, 2026 at 7:04 PM
    Brian1954 and Mendel Leisk like this.
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