1. #1
    dlmrun2002's Avatar
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    2001 Grand Cherokee 4.0 fan blade

    So for the last few days I noticed some weird noise/vibration coming form the front of the car. Been super cold in upstate NY so I was concerned possible tranny issues but much to my surprise today I popped open the hood and saw the fan blade between engine and radiator is wobbling and not spinning. I tried quickly to see if I could spin it back on thinking the fan blade thread is in opposite direction but no luck yet. Looking for any input on the Grand Cherokee and blade issue. Thanks in advance.

    dlm ny country
    Last edited by dlmrun2002; 01-15-2019 at 04:24 PM.

  2. #2
    JPNinPA's Avatar
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    Re: 2001 Grand Cherokee 4.0 fan blade

    Is this a mechanical clutch fan? If you could spin it by hand with the engine off and it spins 5 or more times after you let go replace fan and clutch.

    If the wobbling is what it is attached to that is the water pump. If pulley is moving in and out and wobbling the water pump need to be replaced.


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    Re: 2001 Grand Cherokee 4.0 fan blade

    Quote Originally Posted by JPNinPA View Post
    Is this a mechanical clutch fan? If you could spin it by hand with the engine off and it spins 5 or more times after you let go replace fan and clutch.

    If the wobbling is what it is attached to that is the water pump. If pulley is moving in and out and wobbling the water pump need to be replaced.


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    JPNinPA

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    The fan blade (mechanical) look like it just unscrewed from water pump and is balancing on the end of the shaft. I tried to pull it off but there doesn't seem to be enough clearance between fan shroud and end of water pump threads. Will get a better look in a day or two.It's freezing in NY and I am dealing with a severe flu. Sucks being sick and then your Jeep poops on you.. :)
    dlm ny country

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    mark sr's Avatar
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    Re: 2001 Grand Cherokee 4.0 fan blade

    Assuming it's the same set up as the 1990 cherokee I used to have, there are 4 bolts that hold the fan blade on. Mine had backed out and I was ready to replace the clutch before I realized that the fan itself was loose. I tightened those bolts and it was good to go.

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    Re: 2001 Grand Cherokee 4.0 fan blade

    Yeah it's not the 4 bolts that hold the fan assembly on. I am wondering if the mechanical fans use a viscous type fluid on the fan clutch assembly, similar to what older BMW uses that get to a certain temp and then grab causing the fan to turn. That's not my problem, either way.

    dlm ny country

  6. #6
    JPNinPA's Avatar
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    Re: 2001 Grand Cherokee 4.0 fan blade

    Yes it is a viscous fluid clutch.


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    Re: 2001 Grand Cherokee 4.0 fan blade

    So my fan clutch assemble actually separated from the nut that mounts on the water pump. Just broke away. Old bones I guess. Gonna get a replacement from the online place that doesn't extort your life savings like the box retail joints do. I also have a fan clutch tool for BMW's that WILL fit my Jeep so I can bolt it to my water pump to prevent engine rotation while I get some muscle on the bolt thread on. Will update when Jeep is back on road.

    dlm ny country

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