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Bars leak in small pieces of foam to seal coolant leak

Discussion in 'Gen 2 Prius Technical Discussion' started by lech auto air conditionin, Aug 17, 2019.

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  1. lech auto air conditionin

    lech auto air conditionin Senior Member

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    Bars leak in small pieces of foam to seal coolant leak


    Water heater pump plugged E5FA056A-D1F5-468E-9E3A-9135ECB5AC88.jpeg A3BBA294-9A54-4F0A-B8FF-371CC43AE642.jpeg
     
    #1 lech auto air conditionin, Aug 17, 2019
  2. Fliebly

    Fliebly New Member

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    I found the black foam in my heater pump too! What's causing that?
     
    #2 Fliebly, Feb 27, 2020
  3. dolj

    dolj Senior Member

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    If you listen to the two guys talking in the video, they seem to be fairly sure it is a product called "Bars Leak[s Stop]".

    Funnily, when I was reading your post, I was wondering what kind of crud a radiator stop leak would create, after all, there has to be some kind of material to plug up the leaks, right?
     
    #3 dolj, Feb 27, 2020
  4. lech auto air conditionin

    lech auto air conditionin Senior Member

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    what people do not understand is that with today's new high efficiency radiators/heater cores/ condensers the new small opening (holes) for fluid passage are so small any thing can plug them maybe not all of them but will semi clog your heat exchanger. when I was in GM class in the early 90's we had cutaways of different heater cores with coolant passages so small a BIC ball point pen ball bearing will clog it.
     
    #4 lech auto air conditionin, Feb 28, 2020
  5. Fliebly

    Fliebly New Member

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    Bars leak were the the little pebbles he picked up. The foam is something that is deteriorating inside. I have seen other posts of others having the same issue. I haven’t used a stop leak in my Prius. I was asking about the foam that is showing up in mine and others Prius’.
     
    #5 Fliebly, Feb 28, 2020
  6. valde3

    valde3 Senior Member

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    You're sure? I think they thought that both copper colored stuff and black foam stuff was stop leak. There are many different stop leak products with different stuff in them and none of them should be used in a Prius.
     
    #6 valde3, Feb 28, 2020
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