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  1. #1
    All Terrain
    Join Date
    Sep 2011
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    Glendora, CA
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    how to: replacing fan clutch

    i replaced my fan clutch and tried to do my own little "how to" so here it is

    engine was running super hot while sitting, but while in motion stayed cool for most of the time.... so that immediatly told me i had a bad fan clutch, and the fact it wouldnt click on, and the fact alot of these very helpfull mrmbers on here helped me diagnos the issue


    looking pretty hot "post replacement"

    went and picked up a Hayden Fan Clutch from O'Reilly's Autoparts $59.99


    then rented the fan clutch tools from O'Reilly's $74.99, full reinburstment when returned in 48hrs


    so i let the Hummer sit for abit and cool down so i would have a nice and cool engine to work on...
    then when i went to tackle it i removed the Radiator top hose for a easy removal of the fan shroud


    next i slid the tabs on the shroud to twist the up so there would be enough cleance to get the shroud out and around the fan (you can locate the tab on the passanger side of the shroud and just push down on the locking mechinism then slide up till you cant slide no more and make sure the bottom of the shroud is twisted up so the shroud will come out nice and easy with enough cleance, relest the two tabs you need to pop up on eachside of the shroud as well)


    one more thing is i took off my radiator cap to give alittle more cleance to get the shroud out
    and then make sure you take it out carefully not to break or damage the radiator or anything else in the process, and bam, its out


    once its out, the fun begins, youll be looking at this then

    didnt get a chance to take action shots but to take it off you will need to do this... use the 36mm provided in the fan clutch tool kit that was rented or bought, and put it on the clutch nut, i found that if you use another clutch tool provided in the case, big enough to go around the 4 bolts behind the old fan clutch by the serpentine belt its easy to take off, so you put the 36mm on the fan clutch nut and the bigger fan clutch tool to go around the 4 bolts, its a super tight fit but itll work, you wanna push the 36mm tool towards the passanger side of the vehicle, just like taking a regular bolt off, and hold the other tool in place around the 4 bolts so itll unbolt, youll notice its tough so hit it with a hammer if you can to pop it loose, once its loose your golden...


    youll be left with this, those are the 4 bolts i was talking about, one is hiding behind the place you just unscrewed.

    to take out the old fan clutch you need a size 13mm wrench, and jus unscrew all four.


    so now you have this, my fan was super dirty so i jus washed it up and dried it so it was nice and dirt free then i went ahead and installed the new fan clutch in, and pretty much jus reverse the steps from here...


    new ones in, and happy with it, now the reinstall... make sure the 4 bolts are snug on there.


    just spin it back on and be carefull not to cross thread, when it gets fully on, give it a couple tightening tugs to ensure the fan clutch nut is on securely.

    then be sure to reinstall the fan shroud and twist the bottom back to its home spot and snap in the two corners and the two bottom pins, reinstall the top radiator hose, look and see that coolant levels are good, if not refill as necessary..

    then turn the Hummer on and listen to that fan blow.


    been 2 days since the install was done and wont go above 1/2 on the temp gauge, so all in all, very happy

    hopefully this is helpful, if anyone has anyother suggestions on this process please dont hesitate to comment
    My work in progress

    Torsionlift 23.75.......K&N CAI.......... BFG A/T 315/75/16... Bilstein 5100s all 4 corners.....
    All Lights 8000K HID...... 4 Hellas 55w HID....40" Rigid Industries E-Series(Amber)..... bumper mod.... Murdered out with PlastiDip

  2. The Following 7 Users Say Thank You to JonBishop For This Useful Post:

    3Hummers (06-27-2014), alrock (06-27-2014), Bigunit (06-27-2014), cbetts (08-21-2019), skippy (06-27-2014), SlcHummer (08-21-2019), WillieMo (06-27-2014)

  3. #2
    Street Tire
    Join Date
    Apr 2012
    Location
    Miami, FL
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    Good write up...




  4. #3
    Super Moderator
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    Thanks for the write up.
    1998 H1 Open Top
    1994 H1 HMC4
    1992 H1 HMC4 LE
    1990 1025 Armament Carrier


    KJ6JCC

    BlackSheep Hummer Squadron, H1 PsychoSquad

  5. #4
    Baja

    Join Date
    Jun 2012
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    Ridgecrest, California
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    I'll be trying this soon. My clutch is bad. Thanks Jon!
    2006 H3 Adventure

  6. The Following User Says Thank You to poncho1965 For This Useful Post:

    cbetts (08-21-2019)

  7. #5
    NERD!!!

    Join Date
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    Thanks for sharing this! I replaced my fan clutch last night in 45 minutes. I bought a Lisle 43600 Universal Fan Clutch Wrench Set from Amazon for $45 and Prime shipping. Almost needed a second set hands when reinstalling the shroud. That was a pain to get the pins to line-up on the bottom while jiggling it around.

    It was good to hear the roar of the fan again. I am convinced it was the source of my cooling issues. I will find out Thursday when I drive to Lancaster for the weekend.
    2006 Hummer H3 / Adventure / 5 Speed / No Bling
    2013 Kia Soul+
    2017 Honda HR-V

    My mod list:
    My build thread:

  8. #6
    El Diablo
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    Reloader and I replaced my fan clutch in a parking lot at Big Bear


 

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