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Thread: Cooling air going wrong direction?

  1. #1
    Join Date
    Jul 2020
    Location
    USA Colorado
    Posts
    1

    Default Cooling air going wrong direction?

    Newbie here, and tried searching to no avail.
    1995 GMC Sierra 3500 6.5 diesel turbo.


    1 Standing at the front bumper, the cooling fan blows TO YOU, that is the air blows from the engine thru the grill to the bumper/?????? Am I crazy? or what, I'm closer to 82 than 81 and have never seen that; for the time being, I believe something is wrong, like maybe wrong fan with blades turned/slanted backwards??????


    2 Standing at the front bumper, which way does the engine rotate?


    Thanks,


    LarryR

  2. #2
    Join Date
    Apr 2001
    Location
    Newberg Oregon
    Posts
    12,282

    Default

    Welcome to TDP

    Well now....THE FAN IS SUPPOSED TO SUCK OK

    A couple things come to mind.

    Serpentine belt not installed correctly (Not likely....may not be possible)

    Someone installed a fan blade for a V belt driven setup.

    A serpentine belt system turns the fan backwards from the crank rotation....

    Get a helper to bump the starter while you watch the rotation of the fan.....

    BE SAFE AND KEEP AWAY FROM THE BLADE

    I suspect someone put the wrong blade on OR installed it backwards...

    Here is a picture of an actual factory type 6.5 diesel fan looking at the blade from the engine side (Toward radiator)
    Compare this to yours..

    If memory serves me...there is a ROTATION ARROW on these blades

    Looking from the front AT THE TRUCK the fan SHOULD rotate COUNTER CLOCKWISE

    Let us know what you find....
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