My EGR/OCC Anecdote

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Threej, Sep 23, 2018.

  1. Georgina Rudkus

    Georgina Rudkus Senior Member

    Joined:
    Sep 15, 2018
    742
    559
    0
    Location:
    Taylors, SC
    Vehicle:
    2012 Prius v wagon
    Model:
    Two
    I wonder how clean and how long EGR cleansers and other techniques other than mine produces a fully clean EGR cooler.

    When I was cleaning mine, I was not worried about leaving a "film" inside the EGR cooler. I was more concerned about the thick and possibly "flaky" deposits left behind that might come off in service and find itself in either the EGR valve, go through the intake manifold and into the engine. With ultrasonic cleaners that apply force to the deposits, there is a possibly.

    Based on this case, I believe the time and work to get the EGR cooler fully and "squeaky" clean was worth it.

    On that account, dealers will do no less than to install a new EGR cooler.

    A check of eBay now compared to a few months ago reveals that price of a Gen 3 EGR cooler has risen, as the issues with the coolers' clogging has become readily apparent. Likewise, the number of listings of offers have declined.

    Still, as I did, the prepared owner of Gen 3 Prius models should buy one, clean it fully, and keep it stored away in anticipation of needing it at the 100k mileage. With replacement, the newly removed EGR cleaner can then be cleaned and stored. With the demand ever increasing for used ones and Gen 3 cars increase in mileage with age, the used coolers will likely be in demand for years and will not likely become useless for many years to come.

    Time will tell if and when Gen 4 EGR coolers may also become an issue.

    Finally, fully clear liquid after a one week long soak with solvent, is the only way to tell that the cooler is completely clean.
     
    mjoo and RMB like this.
  2. Threej

    Threej Member

    Joined:
    Jan 25, 2018
    84
    91
    0
    Location:
    Portland, OR
    Vehicle:
    2010 Prius
    Model:
    II
    I think the quest for a "completely clean" cooler serves no purpose beyond pride points. No matter how polished and squeaky you get it, as soon as you turn your car on, it'll have soot again.

    My metric wasn't "immaculate", but rather "unobstructed." There's not much difference, just a lot less stress.
     
    Raytheeagle likes this.
  3. Georgina Rudkus

    Georgina Rudkus Senior Member

    Joined:
    Sep 15, 2018
    742
    559
    0
    Location:
    Taylors, SC
    Vehicle:
    2012 Prius v wagon
    Model:
    Two
    Vibrations and cleaning solvents might loosen but not completely dislodge the particles. These clumps might inadvertently clog the components downstream.

    How is complete cleaning not an advantage?

    Like medical heart operations, damage can occur in the future by loosened plaque as the result of the operation.

    I prefer taking extra time to get it completely clean.
     
    mjoo likes this.
  4. Raytheeagle

    Raytheeagle Senior Member

    Joined:
    Jul 1, 2016
    9,598
    12,993
    0
    Location:
    Bay Area, California
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Plus
    Remember that the cooler will clog again;).

    I don’t strive for “eat out of it” clean, but “clean enough”.

    After 10 minutes with the pressure washer, 99% is the level of clean you get.

    Could I run Brake Kleen through it and get the residue out: yes.

    Will you have to do the cooler with some frequency: yes

    If I put the cooler on a replacement frequency along with the engine coolant, I get it attended to before it is an issue :).

    Something to consider (y).
     
    Grit likes this.
  5. Georgina Rudkus

    Georgina Rudkus Senior Member

    Joined:
    Sep 15, 2018
    742
    559
    0
    Location:
    Taylors, SC
    Vehicle:
    2012 Prius v wagon
    Model:
    Two
    Not worried about the natural progression of the EGR cleaner slowly building up tp a clog. I am worried about chunks flaking off of the disturbed previous clog.
     
  6. ASRDogman

    ASRDogman Senior Member

    Joined:
    May 29, 2018
    1,732
    1,111
    0
    Location:
    Indian River County, Florida
    Vehicle:
    2010 Prius
    Model:
    Two
    "Flakes" are not going to come off. If it take a cleaner and a pressure washer to get it cleaned off,
    a few pounds of pressure are not going to brake them free. If it would, they wouldn't be a problem and
    wouldn't need to be removed to be cleaned.
    You could clean it out the same was you clean out injectors on a diesel, low gear and high rpm's.
     
    mjoo likes this.
  7. Mendel Leisk

    Mendel Leisk 'Orrible Oracle

    Joined:
    Oct 17, 2010
    37,647
    26,448
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    I was gonna settle for clean enough, after dumping a full can of brake cleaner through it:

    upload_2018-9-26_13-5-49.png

    :(

    then tried @mjoo oxi-clean solution:

    upload_2018-9-26_13-6-36.png
    upload_2018-9-26_13-7-9.png
    upload_2018-9-26_13-7-48.png

    and that was the magic bullet:

    upload_2018-9-26_13-8-35.png

    Go to the light, Luke:

    upload_2018-9-26_13-9-21.png

    :D

    The patient:

    upload_2018-9-26_13-10-23.png
     
    Raytheeagle, m.wynn and RMB like this.
  8. mjoo

    mjoo Senior Member

    Joined:
    Nov 9, 2016
    875
    1,089
    12
    Location:
    Michigan
    Vehicle:
    2010 Prius
    Model:
    III
    My son, Lucas was born this May 4th and that's his favorite pastime (looking at lights). He'll probably grow into an astrophysicist or Jedi warrior.

    Pixel XL ?
     
    4est, Raytheeagle and Mendel Leisk like this.
  9. Georgina Rudkus

    Georgina Rudkus Senior Member

    Joined:
    Sep 15, 2018
    742
    559
    0
    Location:
    Taylors, SC
    Vehicle:
    2012 Prius v wagon
    Model:
    Two
    I still prefer absolutely clean.

    There is nothing like absolutely clean or NEW condition,
     
    mjoo likes this.
  10. farmecologist

    farmecologist Senior Member

    Joined:
    Jun 25, 2015
    1,169
    1,145
    0
    Location:
    Southern MN
    Vehicle:
    2010 Prius
    Model:
    II
    As @Mendel Leisk said....Oxi Clean does a wonderful job. I've done this twice and it got both of them squeaky clean. (y)
     
  11. ASRDogman

    ASRDogman Senior Member

    Joined:
    May 29, 2018
    1,732
    1,111
    0
    Location:
    Indian River County, Florida
    Vehicle:
    2010 Prius
    Model:
    Two
    Mendel Leisk and mjoo like this.
  12. mjoo

    mjoo Senior Member

    Joined:
    Nov 9, 2016
    875
    1,089
    12
    Location:
    Michigan
    Vehicle:
    2010 Prius
    Model:
    III
    There's many ways to skin a cat. Pick your poison

    Pixel XL ?
     
    Raytheeagle and Georgina Rudkus like this.
  13. Georgina Rudkus

    Georgina Rudkus Senior Member

    Joined:
    Sep 15, 2018
    742
    559
    0
    Location:
    Taylors, SC
    Vehicle:
    2012 Prius v wagon
    Model:
    Two
    But, there is only one absolutely clean of carbon, with no matter to how you get there.
     
  14. Mendel Leisk

    Mendel Leisk 'Orrible Oracle

    Joined:
    Oct 17, 2010
    37,647
    26,448
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    I think oven cleaner is on the same side of the basic/acid spectrum as oxi, albeit a little more caustic. I did try it on the intake manifold. I could never get it squeaky clean though, due to coarse interior plastic I think.
     
    mjoo likes this.
  15. ASRDogman

    ASRDogman Senior Member

    Joined:
    May 29, 2018
    1,732
    1,111
    0
    Location:
    Indian River County, Florida
    Vehicle:
    2010 Prius
    Model:
    Two
    I wouldn't use oven clean on the intake! It's plastic! It could eat it!
     
  16. Grit

    Grit Senior Member

    Joined:
    Aug 22, 2017
    3,069
    2,561
    1
    Location:
    BOY
    Vehicle:
    2012 Prius
    Model:
    Four
    I prefer mine dirty.

    Cleaning yet to be done.
     
    Raytheeagle likes this.
  17. Mendel Leisk

    Mendel Leisk 'Orrible Oracle

    Joined:
    Oct 17, 2010
    37,647
    26,448
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    So's the oven cleaner bottle. Pretty sure it's ok.
     
    Threej likes this.
  18. ASRDogman

    ASRDogman Senior Member

    Joined:
    May 29, 2018
    1,732
    1,111
    0
    Location:
    Indian River County, Florida
    Vehicle:
    2010 Prius
    Model:
    Two
    Bottle? Mine is in a can.
    I guess it's like Gunk. They make a foam can. Which does NOTHING to remove grease and oil.
    Then the original Gunk, WILL remove grease and gunk.
     
    Mendel Leisk likes this.
  19. farmecologist

    farmecologist Senior Member

    Joined:
    Jun 25, 2015
    1,169
    1,145
    0
    Location:
    Southern MN
    Vehicle:
    2010 Prius
    Model:
    II
    I'll admit that at the time I was scared off by oven cleaner. Thought it might be a little too harsh. However, glad to see people here are having success with it! (y)
     
    Mendel Leisk likes this.
  20. mjoo

    mjoo Senior Member

    Joined:
    Nov 9, 2016
    875
    1,089
    12
    Location:
    Michigan
    Vehicle:
    2010 Prius
    Model:
    III
    I like to think about it as - every hot oxiclean soak that removes gunk should buy me another 3k-5k miles of cooler life.

    Also any coating of carbon will insulate the cooler reducing it's heat removing ability. One of the SAE studies I read mentioned the carbon having the same R value as styrofoam.

    Pixel XL ?
     
    Mendel Leisk and Georgina Rudkus like this.