How to Change a Fan Belt in a Lincoln Navigatorby Grace Mclain
The fan belt on Lincoln Navigator engines is a multi-ribbed serpentine belt. The belt also powers the alternator, vacuum pump, power steering pump, air conditioner compressor and the water pump. The belt is designed to route around each of the accessories. If the belt has developed any type of damage, such as cracking or fraying, change it as soon as possible.
Open the hood. Disconnect the negative (black) battery cable.
Inspect the fan shroud for the accessory belt routing diagram. If the diagram is missing or illegible, use a pen and paper to draw your own diagram before removing the belt. The new belt must be routed around the pulleys exactly as the old one was.
Locate the spring loaded belt tensioner on the front of the engine. There is a small pulley attached to the bottom of the tensioner arm.
Slide the square end of the breaker bar into the square hole in front of the tensioner pulley. Rotate the breaker bar counterclockwise and the entire tensioner will move enough to relieve the tension from the belt. Pull the belt out from under the pulley and slowly let the breaker bar retract.
Remove the accessory belt from each pulley with your hands. Rotate one of the fan blades to the top side of the engine with your hand and pull the belt around it. Repeat this process until the belt is around all of the fan blades. Pull the belt out of the engine compartment.
Route the new belt carefully around each fan blade. Wrap the belt around the crankshaft pulley to begin the belt routing process. Refer back to the belt routing diagram instructions to properly route the new belt around the accessory pulleys.
Turn the tensioner counterclockwise again with the breaker bar. Position the new belt evenly under the tensioner pulley. Allow the tensioner pulley to tighten against the belt. Pull the breaker bar out of the tensioner.
Reconnect the negative battery cable.
Start the engine for five to ten seconds to seat the new belt. Turn the engine off. Visually check that the belt is properly seated around all pulleys.
- Keep all tools and hands away from moving parts while the motor is running.