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  1. McSpeed

    HMMWV Overheat Q's and pictures

    AH...this makes sense. Per that posted manual, this explains why the fan kicks on and off. I usually notice this when I'm cruising at 55 or so. This summer I've been using the truck to take my boat to the lake. I'm on the throttle pretty steady to keep it pulling, which may have it in kick...
  2. McSpeed

    HMMWV Overheat Q's and pictures

    This is a great thread. When I got my truck, the caddy valve was bad so the fan ran all the time. It stayed a cool 180 but DANG...it has ZERO power. Thanks to SS I found out how to test it - narrowed it down...and I replaced that, and saw that when the gauge showed around 220 to 230, the fan...
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