2008 Dodge Ram 2500 Pickup Owner Manual Diesel - Page 423

MAINTAINING YOUR VEHICLE 421 The clear plastic housing on the Filter Minder™ (If Equipped), allows you to view the amount of air pressure drop across the filter element. It consists of a diaphragm and a calibrated spring sealed inside the plastic housing. As the air cleaner filter becomes clogged and air pressure drop across the filter element increases, a yellow disc travels along a graduated scale on the side of the Filter Minder™. The yellow disc will always show the greatest restriction experienced by the filter element. When the disc reaches the red zone, the filter element may need to be replaced. There is no other time or mileage interval for changing the air cleaner filter element. After a new filter element is inserted, press the rubber button on the top of the Filter Minder™ (if equipped). This action will reset the yellow disc to the clean position. CAUTION! When using an engine cleaner or a degreaser, be sure to wrap and tape the Filter Minder™ to protect the plastic housing from damage and discoloration. CAUTION! Many aftermarket performance air filter elements do not adequately filter the air entering the engine. Use of such filters can severely damage your engine. 7