No "how-to" head gasket posts for a Gen4?

Discussion in 'Gen 4 Prius Care, Maintenance and Troubleshooting' started by C Clay, Jul 26, 2026.

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  1. BiomedO1

    BiomedO1 Senior Member

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    That's not a definitive test; since that could simply be condensation in the exhaust system from last night. That's more like an "old wives tale test" to tell yourself your correct.

    Do whatever you want; since it's your time and money. You've been given the proper procedures to verify a head gasket problem.o_O:(:sleep:
     
    #21 BiomedO1, Aug 3, 2026 at 2:50 PM
  2. C Clay

    C Clay Member

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    You ask a good question- does it death rattle? Nothing death rattles like the gen 3- so no. Misfires reported only scanner app- yes.

    As far as the coolant hoses that I bypassed- I have a picture up there. How else does the coolant enter the exhaust? I’m asking because I don’t know.
     
    #22 C Clay, Aug 3, 2026 at 6:16 PM
  3. C Clay

    C Clay Member

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    I appreciate everyone’s perspective and help- It’s not that I’m not doing those tests to rule out that it’s a head gasket -rather I keep trying to figure out how to do the head gasket if that’s my next step.

    If the head exchanger has already been bypassed- what else could it be?
     
    #23 C Clay, Aug 3, 2026 at 6:20 PM
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