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Thread: fan clutch

  1. #1

    Default fan clutch

    hey guys, i replaced the fan clutch on my 05' 2500hd earlier this summer. the problem is on startup its engaged for like a minute or so till a drive about a half mile then it goes back. the one i bought was a cheap $50 from auto zone rather than paying $250 from the dealer for an oem one. is there a cheap fan clutch that only engages when it needs to for less than a hundred bucks. when its below zero here soon the fan blowing full force on every startup will not be good. thanks

    ---------- Post added at 02:39 PM ---------- Previous post was at 02:32 PM ----------

    also everytime the a/c is turned on the fan speeds up,(highway or street) how is this even possible. i plan to go electric fans someday better mileage and power ive heard.

  2. #2

    Default

    It is normal for a fan to stay on for a little while when you first drive off and then shut off. It will work just fine when the cold starts up.

  3. #3

    Default

    The fan uses a silicon compound that reacts to the temp. New ones always are engaged at startup until they get a little older.
    Still Loyal to GM after all these years...:shocked:
    2006 Impala LT 3.5L
    2005 Silverado WT small cab/longbed 4x4 4.3L V6
    1999 Grand Am 3.4L in TX w/ our youngest
    1993 GMC Jimmy 4.3L 4 door 4x4 'Ole Rusty' - 'SOLD'
    1988 S-10 small cab/longbed HT3.4L Crate Engine
    1970 Nova 250 I-6, factory 3 sp floor shifter.
    1968 Chevelle 'Nomad' Wagon 250 I-6 w/ 3 on da' tree.

  4. #4
    Sr. Engineer Sam_A's Avatar
    Join Date
    Jul 2010
    Location
    Hattiesburg, Mississippi, United States
    Posts
    311

    Default

    My fan is doing the same thing and it's extremely annoying.


    2003 Chevy Silverado 2500HD LT 4x4, Crew Cab
    6.6L Duramax Diesel (LB7) with an automatic Allison 1000 5 speed.
    Spray-in bed liner, S&B Air Filter, Homemade CAI ram scoop, ball hitch for Gooseneck
    Black toolbox, metallic-black bowtie, 5.5" NV-200C Bumper Off-Road lights behind a blacked-out grille
    285/75R16E BFG A/Ts
    Future Upgrades: Exhaust, CAI, programmer, intercooler, torque converter

  5. #5

    Default

    My old 06 canyon had 60000km on it and always did it. Just got used ot it.

  6. #6

    Default

    yes it is annoying Sam, sounds like a dump truck. it was 37 degrees here last night and it still does it. hopefully another month or so it will break in and function like its supposed to, or not.

  7. #7
    Sr. Apprentice msvx95's Avatar
    Join Date
    Sep 2009
    Location
    Mentor, Ohio
    Posts
    72

    Default

    Troy, what sound do you mean...just a low steady sound? Reason I'm asking, I think my fan clutch may be acting up, but mine sounds like a blower on a chevelle...LOL But only for a few minutes until I accelerate for a bit. I'm still trying to narrow it down to if it's the clutch or a belt.
    Matt


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