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What are these plastic spirals in my new radiator?

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    What are these plastic spirals in my new radiator?

    New Behr radiator arrived today and when I peek inside of it each rung has one of these plastic twisted spirals in it.

    So can anyone tell me why they are in there and what purpose they serve before I pour coolant into the radiator?

    TIA for any information




    My 1989 e30 s52 Touring... this is Betty

    My 1989 325i vert (sold)...this is Nina

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    #2
    Turbulators.

    Or packing material.

    t
    now, sometimes I just mess with people. It's more entertaining that way. george graves

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      #3
      Vortex generators, makes you coolant flow faster!
      85' 318i ~The Bronze Bomber (FrankenM10 with a Forced Future :wgaf:)

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        #4
        Looks like fusilli. Cooks while you drive.
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          #5
          I've never seen anything like that before.

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            #6
            I have them in my radiator too. It's for evening out load as well as surface area optimization, I'd guess.
            '84 318i M10B18 | 93whp/90ftlbs | 147- Safari Beige | MS2E w/ LC, 2-Step

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              #7
              Seen them made of aluminum in my old 318i, things get stuck in the twists.
              sigpic
              Reich und Roll!

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                #8
                This creates turbulence in the tubes, exposing more coolant to the radiator tube walls and improving heat transfer.

                Car Craft, February, 2009

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