Size of hose used to connect heater line tubing
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Northstar Engines and System Technical Discussion Discussion, Size of hose used to connect heater line tubing in Cadillac Engine Discussion; Hi all, i was wondering if some one might know the diameter of the hose that is used to connect ...
  1. #1
    walliss34 is offline Cadillac Owners Member
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    Size of hose used to connect heater line tubing

    Hi all, i was wondering if some one might know the diameter of the hose that is used to connect the heater line tubes, there are 2 short pieces right above the park/neutral switch.

    Thanks!

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    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
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    Re: Size of hose used to connect heater line tubing

    I would guess 3/4", but get to a NAPA store, pull a hose from stock and measure the ID.

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    walliss34 is offline Cadillac Owners Member
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    Re: Size of hose used to connect heater line tubing

    Thanks Sub, had my wife measure it, the tube is 1" and the id of the hose is 3/4" I was not sure how many different sizes of hose there is but i know what to get now, Thanks again.

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    tateos's Avatar
    tateos is offline Cadillac Owners Connoisseur
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    Re: Size of hose used to connect heater line tubing

    You're supposed to use a special silicone hose there, but I've used regular heater hose there with no problems

  6. #5
    JoeTahoe is offline Cadillac Owners Fanatic
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    Try to get silicon hose

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    walliss34 is offline Cadillac Owners Member
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    Re: Size of hose used to connect heater line tubing

    Where can you get silicon hose? Advance Auto had lots of hose, but we had problems finding 3/4" ID, much less silicon hose. I did not see anything in the hose selection beside the common black heater hose.

  8. #7
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
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    Re: Size of hose used to connect heater line tubing

    The silicone hose was used in an attempt to increase heat resistance and life. If you have to, use good ol' black heater hose with good clamps and slip a length of cutesy braided silver covering over each piece..............

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    JoeTahoe is offline Cadillac Owners Fanatic
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    Re: Size of hose used to connect heater line tubing

    i believe napa has it or a truck shop should have silicon

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