How to Clean EGR, Intake Manifold, PCV Valve and What Else to Check at 155k Miles?

Discussion in 'Gen 2 Prius Technical Discussion' started by Kamilpcc, Mar 23, 2025.

  1. Kamilpcc

    Kamilpcc New Member

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    Cześć wszystkim,
    Jeżdżę Toyotą Prius drugiej generacji z przebiegiem około 250 000 km (około 155 000 mil). O ile wiem, układ EGR, kolektor dolotowy, zawór PCV i powiązane elementy nigdy nie były czyszczone ani serwisowane. Chciałbym się tym zająć teraz, aby zapobiec problemom i zapewnić płynną pracę silnika.

    Czy ktoś mógłby mi pomóc w:

    Jak wyjąć i wyczyścić zawór EGR i chłodnicę

    Jak prawidłowo czyścić kolektor dolotowy

    Gdzie znajduje się zawór PCV i jak uzyskać do niego dostęp

    Jakie inne podzespoły należy przy okazji wyczyścić lub sprawdzić?


    Byłbym naprawdę wdzięczny za wszelkie porady DIY, diagramy, filmy lub porady krok po kroku, którymi możesz się podzielić. Z góry dziękuję!
     
    #1 Kamilpcc, Mar 23, 2025
  2. Mendel Leisk

    Mendel Leisk Senior Member

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    From Google Translate:

    Hi all,
    I drive a second generation Toyota Prius with about 250,000 km (about 155,000 miles) on it. As far as I know, the EGR system, intake manifold, PCV valve and related components have never been cleaned or serviced. I would like to address this now to prevent problems and keep the engine running smoothly.

    Can someone please help me with:

    How to remove and clean the EGR valve and cooler

    How to properly clean the intake manifold

    Where is the PCV valve located and how do I access it

    What other components should I clean or check while I'm at it?

    I would really appreciate any DIY advice, diagrams, videos or step-by-step instructions you can share. Thanks in advance!



    ^ You say it's a second generation. Can you verify the model year, or the date of manufacture (should be on sticker in driver's door opening). If it is indeed 2nd gen, it doesn't have EGR (Exhaust Gas Recirculation), at least not the problematic 3rd gen system.

    For reference, a gen 2:

    upload_2025-3-23_14-17-18.png

    And a gen 3:

    upload_2025-3-23_14-18-9.png
     
    #2 Mendel Leisk, Mar 23, 2025
    bisco, dolj and Brian1954 like this.
  3. Kamilpcc

    Kamilpcc New Member

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    yes I have a 2nd generation model. that is the 1st from the photo. And the second generation doesn't have EGR???? I thought it did. that's great then
     
    #3 Kamilpcc, Mar 24, 2025
  4. MAX2

    MAX2 Senior Member

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    On Gen2 you don't need to clean the EGR, it's not there!
    On Gen2 you don't need to clean the PCV. It's enough to just check it.

    On Gen2 you need to clean the oil collector rings in the cylinders.
    The engine starts to burn oil at high mileage, thereby damaging the catalytic converter.
    Do a decarbonization of the engine and you will notice how the engine has become smoother and quieter.
     
    #4 MAX2, Mar 24, 2025
  5. Kamilpcc

    Kamilpcc New Member

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    so I can use some piston cleaner on the principle of pouring it into the pistons through the spark plug, leaving it for a while and blowing it out. For now I poured fresh oil plus added a long-distance flush. In the meantime I will see if it burns my oil and in the meantime I will clean the pistons.
     
    #5 Kamilpcc, Mar 24, 2025
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