2005 Dodge Caravan Owner's Manual - Page 406

406 MAINTAINING YOUR VEHICLE Belts should be inspected for evidence of cuts, cracks, or glazing, and replaced if there is indication of damage which could result in belt failure. If adjustment is required, the belts must be adjusted according to the specifications and procedures described in the Service Manual. Low generator belt tension can cause battery failure. A special tool is required to properly measure tension and to restore belt tension to factory specifications. Also check belt routing to make sure there is no interference between the belts and other engine components. Spark Plugs Spark plugs must fire properly to assure engine performance and emission control. New plugs should be installed at the specified mileage. The entire set should be replaced if there is any malfunction due to a faulty spark plug, malfunctioning spark plugs can damage the catalytic converter. For proper type of replacement spark plugs, refer to the "Vehicle Emission Control Information" label in the engine compartment. Engine Air Cleaner Filter Under normal driving conditions, replace the air filter at the intervals shown on Schedule "A". If, however, you drive the vehicle frequently under dusty or severe conditions, the filter element should be inspected periodically and replaced if necessary at the intervals shown on Schedule "B".