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Question about engine clutch fan

Discussion in '2nd Gen. Tacomas (2005-2015)' started by L.V.T., Jun 8, 2010.

  1. Jun 8, 2010 at 9:06 PM

    L.V.T. [OP] jackalope killer

    Apr 16, 2010
    Las Vegas
    '10 TRD D-Cab
    Tint, Shaved Mud Flaps ;), Train Horns, 2.5" Fat Bob's front lift, Rear TSB spring lift, DuraTrac's
    ok, im not a big complainer and i do love my truck (just got it last wednesday), but is anyone else bothered/annoyed by the fact that toyota used a clutch fan instead of an electric fan for engine/radiator cooling? it's not a big deal, i just dont know why they wouldnt have used an electric single or dual fan setup.

    is it a good or bad idea to swap over to an electric unit? there has to be a few extra horses we can free up by going to an electric fan setup. not to mention you wont have to listen to that propeller spin under the hood any more haha.
  2. Jun 8, 2010 at 11:02 PM

    Navigator Well-Known Member

    Mar 21, 2008
    Ontario, Canada
    05 DC Sport 6spd
    17" American Racing Assaults on 265/70/17 Goodyear AT/S, TRD Exhaust, TRD CAI, Toyota Roof Rack, XM install with antenna out 3rd brake light, Red LED Map Lights, AUX Amber LED rocker switch for LED footwell lights, LUND Bug Screen, EXTANG Tri-Fold Tonneau, Hertz Component Speakers w/ TacoTunes Mounts, Infinity Kappa 4 amp, Image Dynamics 10" sub in TacoTunes enclosure, Pop n' Lock, Toyota Aluminum Wedge Running Boards, BHLM, Self Performed '05 Cowl Leak TSB, E-Z Cool Insulation/Sound Deadener applied to floorboard, headliner, and cab bulkhead, 896 Foglight bulbs as backup lights, Weathertechs, Pioneer Double Din, Scan Gauge, AutoSoft Remote Start, 2010 4Runner Heated/Signal/Puddle Mirrors.
    I see the new F-150's have electric fans. It sure makes it easy to service to front of the engine, not that doing any pulley or belt work is that hard on the Taco's.
  3. Jun 9, 2010 at 1:23 AM

    Trap Well-Known Member

    May 26, 2010
    Indego Ink TRD OR
    Electric Tail Gate Lock, EZ Down + Cable Mod, Galvanized Underbody, DK 9000, CloudRider SS Grill insert. BakFlip HD, Cabin Air Filter mod, Alarm, Zero Rust !
    Draw back of a electric fan vs a clutch fan is that a electric fan has a huge inrush current as it starts up because really no EMF at zero rpm and when it stops is also generates a huge spike so the problems with that setup is arching on the start relay. Too many start stops cycles kills the starter contacts so when that happens the engine overheats and well that is usually really bad news. With a simple clutch you don't have that problem because the clutch windings are small compared to a motor. I''ll take a clutch over a electric fan any day. I already had a engine distroy itself when the fan starter relay failed. When the over heat engine light went on pulled immediately to the side of the road. Got it towed and the engine was NFG. 4 grand repair bill over a ten dollar relay. No thanks. They changed the engine under warranty even thought the warranty had expired. Told them if they didn't change it on there ticket I'd sue them. It's a stupid pathetic design. Not a Toyota though. No arc suppression on the start up relay so I would have won if it would have ended up in court. You need that on DC motors. When you turn off a motor it becomes a generator for a few seconds as it spins down but a clutch don't really do that. No arcing problem to worry about.
  4. Jun 9, 2010 at 5:14 AM

    skytower Well-Known Member

    Jun 7, 2010
    First Name:
    08 Tacoma 4x4
    Hitch and wiring, aux back-up light, rear strobe lights, radio and underseat sub.
    Clutch fans are not electric. They use viscious silicone fluid and a spring clutch. They clutch is locked on start until the fluid warms. The clutch unlocks until it reaches high operating temp and locks again.
    It's simple, but power robbing. Electric fans can move more air (with duals), but are expensive and semi complicated to install (unless you know how and where to put the temp sensor and do wiring).
    Each has trade-offs, but if you tow often, I'd put an aux electric fan in front of the condenser. Just make sure it will be able to move air the right direction.
    Hope this helps.
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