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1 To replace a worn belt, locate the idler or generator
2 Loosen the hold-down fastener for the idler or generator
3 Pry the idler or generator pulley inward to release the
belt tension and remove the belt.
4 Match the old belt up for size with the new replacement
5 Observe the belt routing diagram in the engine
6 Install the new belt over each of the drive pulleys. Often
the manufacturer recommends a sequence for feeding the belt around the pulleys.
7 Pry out the idler or generator pulley to put tension on
8 Pry out the idler or generator pulley to put tension on
9 Install the belt squarely in the grooves of each pulley.
10 Before adjusting belt tension, check for proper pulley
alignment. This is especially critical with serpentine belts. Measure the belt
deflection in its longest span. If a belt tension
is available, use it and compare the tension to
”If a belt is too tight, wear to bearings for the water pump, alternator,
and engine crankshaft can result.”
11 Pry the idler or generator pulley to adjust the belt to
12 Tighten the idler or generator pulley fastener.
13 Start the engine and check the belt for proper operation.