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Tranmission Cooler Lines

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 65FL, Dec 18, 2000.

  1. 65FL

    65FL Registered Member

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    I got one hell of a kink on the high pressure cooler line. Don't ask how it got there.
    For sake of simplicity and ease I am thinking of just replacing these with rubber
    hoses. I would come off the tranny for the first 2 bends with steel line, but would run
    the rest of the way with rubber hose. Any cons against doing this?

    TIA
    65fl
     
  2. Hobbes68

    Hobbes68 Registered Member

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    Drawbacks are that rubber lines tend to weaken and rupture over time. Also more succeptable to vibration and rubbing a hole in them. On the plus isde, they're much easier to install. I'd take the time to repair or replace the hard lines. You might be able to cut out the kinked area and put in a compression fitting in its place. Easy and will last a long time. No special tools needed except for a tubing cutter and some wrenches.
     
  3. Jason73K5

    Jason73K5 1/2 ton status

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    I've thought of doing this too. The cons that I have come up with are:
    They don't last as long.
    The rubber acts like insulation, keepint the fluid hotter.
    They don't stay where you want them unless you attach them to the frame.
    They are much more suceptable to heat and other types of damage .

    There are probably others that I can't think of right now. If you hit a shop like NAPA, they should be able to hook you up with some new hard lines of the right length, just bend them to fit and you'll probably be much happier in the long run. Another Idea that I've been toying with doing in my K-5(as soon as I upgrade the tranny) is replacing the lines full length with steel braided hoses and fittings. The only disadvantage to that(besides cost) is that you lose the cooling ability of the hard lines. Hope this helps you some.
     
  4. mudhog

    mudhog THEGAME Staff Member Super Moderator

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    i would just get new hard lines you will be better off

    s.smith 77blazer lookin 4 mud
     
  5. Thumper

    Thumper 1/2 ton status

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    I busted the case of my tranny by putting a tiny bit too much pressure on the steel line. When I replaced them, I used a short section of rubber hose. I have about 6" of steel line from the tranny out, then about 8" of rubber, and the rest is steel. It allows the tranny to move without putting any stress on the tranny housing.

    Seems to work OK.

    Mike


    <font color=blue>Thumper
    85 Fullsize Jimmy
    [​IMG]
    <font color=red>Lets Go Wheelin! </font color=red>
     
  6. DMK

    DMK 1/2 ton status

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    If you use rubber hose for the repair make sure you use trans cooler hose. Should not be a problem.
     

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