Chirping heater fan

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Thread: Chirping heater fan

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    Supporter Hickleberry's Avatar
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    Default Chirping heater fan

    When I turn on the fan I notice a chirping noise.

    It doesn't always do it, and when it does do it, often it goes away.

    Its not loud, if the radio is on I don't hear it

    All the same, it irritates me.

    I thought Toyota was supposed to build vehicles which last forever.

    I haven't even had the truck for 4 years.

    Anybody else have this problem?

    or fixed it?

    Is it difficult to access this fan?
    I don't have a penis...anymore

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  3. #2
    Junior Member slowyota's Avatar
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    Default Re: Chirping heater fan

    Funny you posted this...mine just started doing it this morning. But didn't think anything of it, because it eventually goes away. I was thinking that maybe the water leak may have had something to do with the noise...

    Anybody got any ideas?

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    Veteran Member Garth's Avatar
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    Default Re: Chirping heater fan

    I had the same issue a few yrs ago, I tried to put sewing machine oil on the bearings, but it didn't help. I eventually ended up replacing it. It comes off with 3 screws if I remember right.
    5.7L 4x4 DCSB

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    Default Re: Chirping heater fan

    But where is it?

    Will I have to take my dash apart or pull the stereo?
    I don't have a penis...anymore

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    Veteran Member Garth's Avatar
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    Default Re: Chirping heater fan

    ah, sorry. it's above the passenger's feet, right there under the glove box. Easiest access is from the passenger side foot area.

    It's a black motor (that you see) with a white squirrel cage fan up in the air box. The 3 bolts are on the outside of the fan, fastening up to the air box above it.

    -Garth
    5.7L 4x4 DCSB

    Mods completed so far:Techstream No Locks on takeoff/park/in gear -Underseat storage~Husky Weatherbeaters~Truxedo LT Pro QT Tonneau Cover~Westin Step Bars~Scotchguarded carpet/seats~Backup Camera with dimming mirror~Onyx Spray in BedLiner~TRD Sway Bar~Webasto 740 Series Sunroof~
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    Default Re: Chirping heater fan

    Mine did that, sounded like a bird in the cab.
    I took the fan out, disassembled the motor, cleaned all the gunk out from the bearings and re-saturated the foam around the bearings with oil, squeak went away. That was about 3 months ago, no chirps since.

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    Default Re: Chirping heater fan

    Quote Originally Posted by dshealey View Post
    Mine did that, sounded like a bird in the cab.
    I took the fan out, disassembled the motor, cleaned all the gunk out from the bearings and re-saturated the foam around the bearings with oil, squeak went away. That was about 3 months ago, no chirps since.
    putting oil on a greased component is a short term fix. don't be surprised if the noise returns when the oil drys out.

    What's worse is that oil will wash away the grease, so next time it will be worse.

    Or could be.

    I wish you the best of luck, cuz if it works, I'll do the same.
    I don't have a penis...anymore

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    Default Re: Chirping heater fan

    count me in. Mine is not really a chirp, but a tic tic tic like there is a leaf or something caught close to the fan blades. Drives me nuts!

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    Default Re: Chirping heater fan

    Quote Originally Posted by Tundra_Hick View Post
    putting oil on a greased component is a short term fix. don't be surprised if the noise returns when the oil drys out.

    What's worse is that oil will wash away the grease, so next time it will be worse.

    Or could be.

    I wish you the best of luck, cuz if it works, I'll do the same.
    It is not a greased component. The bearings are oil filled porous bronze (like Oilite branded bearings). There is a felt/foam oil reservoir surrounding the bearing to supply additional oil to the bearing as it is used up. This is common in small motors. In the distant past, many of these type motors had holes or little flip up caps in which additional oil could be added.

    Look at the Oilite web page below, the bottom bearing in the picture is a small motor bearing of the type used in automotive small motors such as the fan motors.
    Official Oilite Website- Self-lubricating Bearings

    If you take the Tundra fan motor apart you will see the bearings and the felt oil retaining reservoir. The bottom one will likely be covered by black crud. wipe this out and clean away as much as you can from the bearing retainer spring plate, then re-oil the felt until it won't absorb any more oil. You may get nearly as much additional life as your original mileage on the motor, as long as the bearing has not run dry enough to cause it and the shaft to have worn noticeably.

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    Default Re: Chirping heater fan

    Here's what I found when I took mine apart:

    I pried the squirrel cage off the shaft, (NOT an easy task!), and noticed a silver-colored cap covering that end of the motor shaft. I pried the cap off and found lots of black gunk and what looked like a couple of washers and a flat retainer ring. The washers were completely deteriorated and in pieces. Looked like a factory parts and workmanship defect.

    I didn't have anything laying around that could replace the washers, so just cleaned it up, lubrcated it, and put the retainer ring back in place. I hope to get another year out of the fan before having to buy a new one. By the way, the thing is a lot quieter now.

    If anyone knows what can make this a more permanent fix, I'm all ears.
    Any fool can fix it right with lots of money.
    The cool thing to do is fix it right with the least amount of money.

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    Default Re: Chirping heater fan

    Mine chirps too on any setting other than low fan speed. It happens about once a week for a few minutes each time. Glad to hear it doesn't involve a lot of tear down to to replace.
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    Default Re: Chirping heater fan

    EZ to get to the fan...10 minutes to pull it, clean it, and reinstall it. Had a pine needle that had made its way down into the cage and was making a ticking noise. Used an air hose to blow an incredible amount of dust off of the fan, then reinstalled.

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    Junior Member remotemonkey's Avatar
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    Default Re: Chirping heater fan

    when i still had my 01 i had the same problem, it was filled with pine needles and grass! took it out and worked fine.

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    Default Re: Chirping heater fan

    Mine was making a noise and vibrating on high speed. really loud. I pulled it and found some critter had made a nest and and the wheel was full of fiber glass insulation and other nesting material. I cleaned it out and it is good as new. lol Still don't know how it got in there and where it went. I live in the woods so lots of critters around.

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    Default Re: Chirping heater fan

    I pulled the fan motor out, disconnected the wires, then attempted to take it apart to clean.

    No luck, I can't get anthing to move.

    Pic 1 is the bottom, there are two screws, I removed them but they didn't seem to make a difference.

    Pic 2 is the inside of the fan, there's a clip which I removed, but the fan won't come off the shaft.

    Pic 3, there is an access cover, but it didn't help either.

    Pic 4 is just a side view of the fan.

    I squirted all of it with compressed air, reinstalled and there was no squeak, but who knows if that did anything.
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    Last edited by Hickleberry; 11-02-2008 at 02:34 PM.
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