ENGINE Engine Fan With the engine idling and the hood open, stand at the front of the vehicle. Listen for any noises coming from the fan hub. Bearings that have lost lubricant, and are dry, will typically emit a squeal or a growl when the engine is at operating temperature and the fan clutch is engaged. If noise is detected, have the fan bearings inspected by an authorized dealership. Fan Drive and Blade WARNING! WARNING! Do not work on the fan with the en- gine running. The engine fan can engage at any time without warn- ing. Before turning on the ignition, be sure that no one is near the fan. Failure to comply may result in death or personal injury.
Do not work on the fan with the en- gine running. The engine fan can engage at any time without warning. Before turning on the ignition be sure that no one is near the fan. Failure to comply may result in death or per- sonal injury. Your truck may be equipped with an On/Off or Viscous Fan Drive. Follow these guidelines to check your engine fan: Fan Blade Clearance: Around the fan shroud, the recommended distance is 1 in. (25 mm) from front edge of any fan blade-to-radiator side member. Minimum clearance is 3/4 in. (19 mm). 5 Check the fan bearings for fan hub bearing looseness, loss of lubricant and any abnormal conditions.
(For example, fan belt misaligned or excessive wear/damage.) Before starting the engine and with the engine off, look and feel for looseness in the fan hub. Rear edge of any blade must be no closer than 3/8 in. (9 mm) to the nearest engine component. If this cannot be obtained, the fan spacer or fan is not correct. The leading edge of any fan blade must be 1 in. (25 mm) from the inside edge of the shroud. 5-106 Y53-6077-1B1 (03/17)