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Thread: Comet to Clean a Radiator?

  1. 03-13-2007 11:14 AM #1
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    Papa Rick
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    Default Comet to Clean a Radiator?

    Has anyone ever heard of doing this? I found out yesterday that a mechanic put Bars Leak in my Radiator a couple of months ago, and I want to flush my system out this week end. Any suggestions or ideas would be greatly appreciated.

    I have a 1985 FLC with a 350BCC engine.
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  2. 03-13-2007 12:37 PM #2
    yoopr
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    Noooooooo
    Lots of manufactures put in Bars Leak right at the time the Truck is put on the Line

    Good Radiator flush will do the trick for you
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  3. 03-13-2007 12:49 PM #3
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    What is the best method to do a Radiator Flush?
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  4. 03-13-2007 12:54 PM #4
    yoopr
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    get a flushing kit
    A good radiator flush will give you the instructions on how to clean and flush your radiator.
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  5. 03-13-2007 03:14 PM #5
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    Just remember about flushing
    It only takes a little anti freeze to kill a dog
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  6. 03-13-2007 03:41 PM #6
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    Try adding some transmission fluid to the radiator.
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  7. 03-13-2007 05:29 PM #7
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    Quote Originally Posted by Rev.Vassago
    Try adding some transmission fluid to the radiator.
    yeah it'll make the injectors run cooler stay away from the comet, why did he put the stop leak in??Remember if you flush the system you just mey find out you needed the stop leak after all
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  8. 03-13-2007 05:33 PM #8
    yoopr
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    Quote Originally Posted by repete
    Quote Originally Posted by Rev.Vassago
    Try adding some transmission fluid to the radiator.
    yeah it'll make the injectors run cooler stay away from the comet, why did he put the stop leak in??Remember if you flush the system you just mey find out you needed the stop leak after all
    lol-yep-Sometimes when you flush the radiator you might find a pinhole or two
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  9. 03-13-2007 05:43 PM #9
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    And I'm sure the abrasives in Comet would do wonders for the water pump seals.
    If you can't shift it smoothly, you shouldn't be driving it.
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  10. 03-13-2007 05:55 PM #10
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    I know some truck dealers who use Cascade dishwashing detergent.
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  11. 03-13-2007 05:56 PM #11
    yoopr
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    Quote Originally Posted by Splitshifter
    And I'm sure the abrasives in Comet would do wonders for the water pump seals.
    I'm hopeing the comment about Comet was a Joke
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  12. 03-13-2007 06:26 PM #12
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    Quote Originally Posted by GMAN
    I know some truck dealers who use Cascade dishwashing detergent.
    Which is just as stupid as using transmission fluid to clean the injectors. Just sayin'. :wink:
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  13. 03-13-2007 06:48 PM #13
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    It must not be too stupid. It works. I had one dealer use Cascade in my radiator to get all the fuel out when I needed to put in new injector sleeves. By the way, it was a Peterbilt dealer in Amarillo. If you have work done on yours they may also use Cascade, too. :wink: I stopped to get parts at another dealer, I believe it was in Abilene, and they told me that they also use Cascade dishwashing detergent. That was a Volvo dealer. The Volvo dealer told me that Cascade was the best cleaner they have found for radiators. I suppose all these dealers who use it are also stupid? As far as transmission fluid is concerned, I believe in using what works. Frankly, I think it is stupid to pay $20 on specialty chemicals to do a job that can be better done for $2.
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  14. 03-14-2007 06:29 AM #14
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    G...it's useless to state anything concerning personal experience with these guy's. They know more than you do, because they have more experience than you do. LOL.....and the Rev just stated on the injector thread that Papa started, that he has "lived 31 years".

    Papa needs to continue spending $20 every month, when $4.00 will do the same thing.


    Papa...you really want to flush your Radiator...Take it to a radiator shop, have them hook it up to their tub. They will flush it for you for $350 or so..and will use Cascade...just like most dealerships will.


    See....the thing about using stuff like Comet and Cascade...they pre-mix it in the right proportions with the water that is going to be used...They don't just pour it into the radiator and start flushing it through. And...regular Tap water is just as abrasive in a radiator as comet is. Anything that is in liquid form, and moved under pressure is abrasive.


    Papa...for the record. I started driving "professionally" in 1979. I am not a "Mechanic" nor do I profess to be one. When I take a truck into a shop to get work done, I will watch, and I will ask questions. When I see a mechanic open a bottle of transmission fluid, and pour said transmission fluid into the fuel filter he just took out of a fresh plastic wrapper...I ask why he did what he did. if He states that it cleans the injector's and primes the system better than filling the filter with diesel, who am I to contradict him...He is the Mechanic, and I am the driver.

    When I watch an employee of a "Professional" radiator repair shop cut open a can of comet and pour that comet into the tub he is filling to flush my radiator...I ask "why for" and say "Oh...I see"...when I really did not have a clue. (They use abbraisive's to break loose the crud built up inside the radiator core by the way..and none of this fluid goes into the engine block....Professional shops and dealerships disconnect the radiator from the engine to do their flushing).

    Stop leak is bad for your engine (it does not stay in your radiator..it travels through the block and heads to)....That from more than one Mechanic...and I know a few.

    For what is worth.....
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  15. 03-14-2007 06:57 AM #15
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    Show me the science behind it, and I'll be the first in line to buy transmission fluid and Comet. But, anecdotal evidence is not proof, and is not science. I've seen mechanics - certified ones - do some really stupid things, because they thought their methods would work. That doesn't make them right.

    I'll take these MECHANIC'S words over your anecdotal "proof" anyday:

    http://www.cartalk.com/content/colum...August/12.html

    FYI, most radiator flushing kits contain Oxalic acid. Comet does not.

    Comet's active ingredient is Sodium dichloro-s-triazinetrione dihydrate. Dichloroisocyanuric acid (the "dichloro" in Comet's ingredients) is an OXIDIZER. The last I checked, oxidation was not a good thing.

    Quote Originally Posted by Orangetxguy
    I am not a "Mechanic" nor do I profess to be one.
    :wink:
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  16. 03-14-2007 04:16 PM #16
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    damn!!!! you all are bringing up bad memories.. when i was a kid & came in all dirty, my mom used to pour comet on my hands & scrub clean with scrub brush... now i'm getting flashbacks & gonna have nightmares!!!
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