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Thread: Cleaning aluminum block

  1. #1
    Tom Donnellan
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    Cleaning aluminum block

    Has anyone had experience in cleaning an aluminum block engine on the airhead? I have obtained some stuff called Dupont 225S, which is used as a preliminary treatment before application of paint. Primary ingredient appears to be phosphoric acid. The stuff is to be cut with equal parts water and chemical.

    Please respond.

    tpd

  2. #2
    dlearl476
    Guest
    If you have the engine apart, fantastic results can be obtained with "soda blasting" Check your yellow pages and make some calls (in the "sandblasting" section).

    If you don't have it apart, I'd try White Lightning brand Greased Lightning "Orange Blast" . IMHO, Simple Green and Castrol "Purple Power" are too caustic for aluminum and unless you're very careful with it, you'll end up with more corrosion after than before.
    For the truly anal, you can follow the Orange Blast treatment with some kerosene dipped in a soft wire brush (brass or aluminum. Don't use steel or you'll scratch the heck out of your cases) for a spectacular finish.

  3. #3
    BUBBAZANETTI
    Guest
    "then i put it in the dishwasher"

    LOL, this made my day, if you are talking about putting the engine block itself in the dishwasher

  4. #4
    Alps Adventurer GlobalRider's Avatar
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    Quote Originally Posted by Tom Donnellan
    Has anyone had experience in cleaning an aluminum block engine on the airhead? I have obtained some stuff called Dupont 225S, which is used as a preliminary treatment before application of paint. Primary ingredient appears to be phosphoric acid. The stuff is to be cut with equal parts water and chemical.

    Please respond.

    tpd

    If you are trying to clean dirt and oil residue away, I wouldn't us any cleaner that contains acid.

    If you are trying to rid the block of oxidation, then maybe. If you use an acid cleaner on a block that is still bright due to clear anodizing, then you will eat away at the anodized layer using the acid.

  5. #5
    Stressed Member jmerlino's Avatar
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    Quote Originally Posted by BubbaZanetti
    "then i put it in the dishwasher"

    LOL, this made my day, if you are talking about putting the engine block itself in the dishwasher
    Yeah, that sounds like a Jeff Foxworthy joke or something: "If you've ever put an engine block in your dishwasher..."
    --Joe Merlino - Modified '82 R100RT

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    Rally Rat TZOLK's Avatar
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    Rally Rat bprigge's Avatar
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    Shoe Gene

    FLASH412

    How can I tell if a woman has the Shoe Gene or not? I want one like you got.

    Bruce

  8. #8
    Rally Rat bprigge's Avatar
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    Shoe Gene

    OK, Thanks!

    I think I might already have one like yours.

    Bruce

  9. #9
    Rally Rat YB in IN's Avatar
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    Quote Originally Posted by flash412
    Look in her closet at her shoes. If she has 3X more shoes than you do, she has it.
    Mine has the shoe gene, but she sure is a good passenger behind me.

  10. #10
    On the Road troposcuba's Avatar
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    I think mine has the "recessive" rather than the "dominant" shoe gene. it is there, but just barely. she still likes cars and bikes almost as much as me.

  11. #11
    Rally Rat donkey doctor's Avatar
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    Hello; for cleaning the engine I use Gojo hand ckeaner and a stiff brush followed by a good water rinse. It'll remove the stains but not the paint. The stuff I have has a grit in it, but I have seen it without grit and would use that too if it is what I had. I have used this technique on quite a few model airplane engines which stain up with castor oil residue which is real tough to remove. Nakes a nice smell too.

  12. #12
    Registered User Bob_M's Avatar
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    Quote Originally Posted by Tom Donnellan
    Has anyone had experience in cleaning an aluminum block engine on the airhead? I have obtained some stuff called Dupont 225S, which is used as a preliminary treatment before application of paint. Primary ingredient appears to be phosphoric acid. The stuff is to be cut with equal parts water and chemical.

    Please respond.

    tpd
    This stuff is the active ingredient in Navel Jelly. It reacts with ferous oxide (rust) to form ferous phospate which is stable enough to paint. It is intended for use with steel, and I can't say what its reaction with aluminum would be. Try putting it in your wife's shoes

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