EGR Cooler Cleaning - PICS

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by ArmyChief, Apr 26, 2020.

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  1. ArmyChief

    ArmyChief Junior Member

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    Well, keeping my threads separated between intake manifold and EGR cooler. Here is the EGR cooler after two days soaking in OxyClean & Purple Power. MANY times with the pressure washer both through the inlet and outlet sides. Then half a can of Easy-Off oven cleaner.

    I would say I spent 3 minutes per pressure washer routine. Probably did that for a combined time of an hour !

    LOT's of pressure washer cleaning (almost always would be clean and as I rotated around the tube..would then hit an obstruction and then BAM..black and chunks).

    Wednesday i got to put it all back together and then move on to the next project.

    BTW, as I stated in the other thread, I bought a NEW TOYOTA EGR Valve on eBay from Japan for about $150.
     

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    #1 ArmyChief, Apr 26, 2020
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  2. Mendel Leisk

    Mendel Leisk Senior Member

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    Yeah thought that valve looked super clean. That's maybe a good one-two punch, oxi then pressure washer. Or the other way 'round. (y)
     
    #2 Mendel Leisk, Apr 26, 2020
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  3. Raytheeagle

    Raytheeagle Senior Member

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    Ah another data point for the pressure washer:).

    Glad you got this sorted(y).
     
    #3 Raytheeagle, Apr 26, 2020
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  4. rpieper

    rpieper Junior Member

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    Resurrecting this old string – I have undertaken the cleaning of my 2012, and I have some observations/questions.

    When using the power washer, how does one keep the spray from ‘getting all over’? My first attempt ending up getting some splash back into my eye – tried washing out and ended up with wife taking me to ER for checkup. I had wrap around sun glasses, a hat, long sleeve shirt, etc.

    I had read in one place that someone had used an old bike spoke to help poke out the passage – I tried one but it was too large – sizing it I come up with wire gauge 19 or smaller.

    I am thinking or putting together a compilation of ‘step-by-step for cleaning the cooler. I don’t think I will have to do this again but with Gen 3’s now at about 15 years I believe that more DIY’ers will think about doing this if they can get a head’s up.

    I replaced the EGR valve (old one was hopelessly stuck) cleaned the pipe to the manifold. Price of a new cooler – more than $400 was a little steep so figured I would try to clean mine. I have yet to pull the Intake manifold off.

    I appreciate any thoughts.
     
    #4 rpieper, Jun 9, 2025 at 8:41 PM
  5. ASRDogman

    ASRDogman Senior Member

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    Oven cleaner. It eats the carbon. Then pressure washer.
    Just close your eyes, and look away....

     
    #5 ASRDogman, Jun 9, 2025 at 10:14 PM
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