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Cleaned EGR valve, not sure if full circuit is needed. 111k miles

Discussion in 'Gen 3 Prius Main Forum' started by gboss, Aug 12, 2024 at 10:54 PM.

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  1. gboss

    gboss Member

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    I cleaned the EGR valve today to gauge whether the EGR system seems bad enough to go through with a full cleaning circuit (cooler, intake, etc.). What do you guys think?

    You can see that it looks caked in carbon before cleaning, but honestly after spraying it with parts cleaner and running a shop rag through it...it was clean and with very little sediment that came off (last 2 pictures). Visually it looked caked, but in reality it was just a thin layer of carbon. I think the revised welding line makes the first picture seem like it is caked on there, but that is just the welding line lightly dusted. Most of the sediment appeared around contact points of the valve/EGR system, the inside wasn't terrible.

    As long as the 96% of the EGR piping is supplying flow, does the system really need to be cleaned? Maybe the cooler is clogged but based on the valve, I'm guessing it's not. What do you all think, should I clean the cooler or just let it be and maybe settle for cleaning the intake while I'm already in here?
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    #1 gboss, Aug 12, 2024 at 10:54 PM
  2. bettergolf

    bettergolf Active Member

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    How many miles was on this Valve?
     
    #2 bettergolf, Aug 13, 2024 at 12:16 AM
  3. gboss

    gboss Member

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    I would guess 111k unless the previous owner did a replacement prior to 70k. I have no way of knowing for sure.
     
    #3 gboss, Aug 13, 2024 at 1:53 AM
  4. ASRDogman

    ASRDogman Senior Member

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    the cooler is the most important part. 2nd are the little holes in the intake
    manifold the exhaust gas flows through.
    Both have tiny passages that get clogged quicker.

    The best idea is to clean it before it gets clogged. Like changing the engine oil
    before it fails.

     
    #4 ASRDogman, Aug 13, 2024 at 6:54 AM
  5. Mendel Leisk

    Mendel Leisk Senior Member

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    I’m guessing the only component removed was the pipe between the EGR valve and intake manifold? Or did you manage to have the EGR valve in your hands?

    111k miles, it’s time. Get the whole thing done, intake manifold as well. See top two links in my signature on a phone turn it landscape to see signatures).
     
    #5 Mendel Leisk, Aug 13, 2024 at 7:55 AM
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