Drive Belt Chirping Diagnosis - GMC chevrolet camaro 2000 Service Manual

6-32 Engine Mechanical - 3.8L
Drive Belt Chirping Diagnosis
Diagnostic Aids
The symptom may be intermittent due to moisture on
the drive belt or the pulleys. It may be necessary
to spray a small amount of water on the drive belt ih
order to duplicate the customers concern. If spraying
water on the drive belt duplicates the symptom,
cleaning the belt pulleys may be .the probable solution.
A loose or improper installation of a body component,
a suspension component, or other item(s) on the
vehicle may cause the chirping noise.
Test Description
The number(s) below refer to the step number(s) on
the diagnostic table.
2. The noise may not be engine related. This step is
to verify that the engine is making the noise. If
the engine is not making the noise do not proceed
further with this table.
3. Th.e noise may be an internal engine noise.
Remove the drive belt and operate the engine for
a brief period, this will verify if the chirping
noise is related to the drive belt. With the drive
belt(s) removed the water pump may not operate
and the engine may overheat. Also DTCs may
set when the engine is operated with the drive belt
removed.
4. Inspect all drive belt pulleys for pilling. Pilling .is
the small balls or pills or it may be strings in
the drive belt grooves from the accumulation of
rubber dust.
Engine
6. Misalignment of the pulleys may be caused from
improper mounting of the accessory drive
component, incorrect installation of the accessory
drive component pulley, or the pulley may be
bent inward or outward from a previous repair.
Test for a misaligned pulley using a straight edge
in the pulley grooves across two or three pulleys.
If a misaligned pulley is found, refer to that
accessory drive component for the proper
installation procedure for that pulley.
10. Inspection of the fasteners can eliminate the
possibility that a wrong bolt, nut, spacer, or washer
was installed.
12. Inspecting the pulleys for being bent should
include inspecting for dents or other damage to
the pulleys that would prevent the drive belt ·
from not seating properly in all of the pulley
grooves or on the smooth surface of a pulley when
the back side of the belt is used to drive the
pulley.
14. Replacing the drive belt when it is not damaged or
there is not excessive pilling will only be a
temporary repair.
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