Coolant loss- any connection to a fuel injector

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by C Clay, Dec 2, 2025 at 6:06 AM.

  1. priumium

    priumium Member

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    Ah, but also a measurement of compressors capacity is pressure, so that’s air volume/time unit (normally one minute), that would end up at apx 4.5 bar/65 PSI (minute volume). Correct? That’s good enough.
     
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  2. indel

    indel Member

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    Most people who are cleaning the coolers are first using some kind of solvent, then blowing it out with a pressure washer before finally spraying air to make the passages completely dry. Merv and many others have used wires to disengage the carbonized dust from the passages. To date I have not found a wire that works for me.

    In the used JDM cooler I bought from ebay, every little passage has a slanted metal plate inside it dividing the the passage into two triangles. I do not know if that's the standard design but it makes it harder to insert wires in there. I will report back once I receive my brand new cooler today.
     
  3. priumium

    priumium Member

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    Yep, I am aware and also considered this. But as soon as you add liquid to this ash it’s much harder to blow out (with air).
     
  4. rjparker

    rjparker Tu Humilde Sirviente

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    The cooler can be clogged with a hard sticky material if the engine is burning oil. Otherwise it is fine. A good gen3 engine will show no observable oil loss in 5k miles. An oil burner can be fixed with pistons and rings demonstrated thousands of times under warranty.

    A wire chucked on a drill does work on the serious sticky oil residue.
     
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  5. indel

    indel Member

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    Can you provide the gauge or example of the type of wire you used for this purpose? A link would be very helpful.
     
  6. priumium

    priumium Member

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    A good G3 engine will therefore not have oily residue in the EGR cooler.
     
  7. Mendel Leisk

    Mendel Leisk MMX GEN III

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    Guess I’m an outlier: dipstick never budges, and when I clean the EGR valve, cooler, pipe and the intake manifold (twice now), the “ash” is closer to anthracite coal, lol.
     
  8. indel

    indel Member

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    My 2012 Two has 142.5K miles. I bought it just a little over 1K miles ago. So far, my oil level has not dropped any at all and I am hoping the streak continues.
     
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  9. Mendel Leisk

    Mendel Leisk MMX GEN III

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    Yeah, until partway through model year 2014, they’ve got low tension piston rings. Kinda like being born with a heart defect.
     
  10. rjparker

    rjparker Tu Humilde Sirviente

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    I did it many moons ago (maybe 120 moons kemosahbee) but it was something like a thin clothes hanger wire - stiff but still flexible enough to make a slight bend.

    Chucked in a drill, you literally bore through the gunk. Start with a short piece and progress to 2/3 length.

    This was after several days in a professional parts cleaner failed and we simply bought a new one.

    The clogged cooler was later cleaned by rotating wire followed by solvents over many more days as a passion project (it will not and did not defeat me!).

    It found a new home on the next gen3 needing one - recovering most of the new cooler's cost. The cleaning labor was a sunk cost, something most shops can't afford to charge for and keep customers when a new one is 1.5 hours labor and much more efficient. Plus no lye in the eye.
     
    #30 rjparker, Dec 5, 2025 at 3:10 PM
    Last edited: Dec 5, 2025 at 3:33 PM
  11. indel

    indel Member

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    Do you have to remove the head to
    I haven't used that type of clothes hanger in a long time, but if memory serves right, those wires were pretty thick. I did have some luck inserting a picture frame hanging wire (the thinnest I could find) in there, but it bends too easily and it might break if I try rotating it inside. That would be a terrible thing to happen.