2008 Dodge Durango Owner Manual - Page 395

MAINTAINING YOUR VEHICLE 395 belt tension can cause belt slippage and failure. Belts should be inspected for evidence of cuts, cracks, glazing, or frayed cords and replaced if there is indication of damage which could result in belt failure. Low generator belt tension can cause battery failure. 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 proper engine performance and emission control. The plugs installed in your vehicle should operate satisfactorily in normal service for the mileage indicated in the Maintenance Chart. New plugs should be installed at this mileage. The entire set should be replaced if there is any malfunction due to a faulty spark plug. Refer to Fluids, Lubricants and Genuine Parts for the proper type of spark plug for your vehicle. CAUTION! When replacing plugs, do not overtighten. You could damage them and cause them to leak. Engine Air Cleaner Filter Follow the Maintenance Schedule for recommended engine air cleaner filter change intervals. WARNING! The air cleaner can provide a measure of protection in the case of engine backfire. Do not remove the air cleaner unless such removal is necessary for repair or maintenance. Make sure that no one is near the engine compartment before starting the vehicle with the air cleaner removed. Failure to do so can result in serious personal injury. 7