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SERVICING AND MAINTENANCE 427
When inspecting accessory drive belts, small cracks that run
across ribbed surface of belt from rib to rib, are considered
normal. These are not a reason to replace belt. However,
cracks running along a rib (not across) are not normal. Any
belt with cracks running along a rib must be replaced. Also
have the belt replaced if it has excessive wear, frayed cords
or severe glazing.
Accessory Belt (Serpentine Belt)
Conditions that would require replacement:
• Rib chunking (one or more ribs has separated from belt
body)
• Rib or belt wear
• Longitudinal belt cracking (cracks between two ribs)
• Belt slips
• “Groove jumping" (belt does not maintain correct position
on pulley)
• Belt broken (note: identify and correct problem before new
belt is installed)
• Noise (objectionable squeal, squeak, or rumble is heard or
felt while drive belt is in operation)
Some conditions can be caused by a faulty component such
as a belt pulley. Belt pulleys should be carefully inspected for
damage and proper alignment.
Belt replacement on some models requires the use of special
tools, we recommend having your vehicle serviced at an
authorized dealer.
7
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