Drive B~Lt ,Excessive. Wear Diagnosis; Drive Belt Tensioner Diagnosis - GMC chevrolet camaro 2000 Service Manual

6-42 Engine Mechanical - 3.8L
Drive Belt Excessive Wear Diagnosis
Diagnostic Aids
Excessive wear on a drive belt is usually caused by
an incorrect installation or the wrong drive belt for the
application.
Minor misalignment of the drive belt pulleys will not
cause excessive wear, but will probably cause
the drive belt to make a noise or to fall off the
pulley (s).
Excessive misalignment of the drive belt pulleys will
cause excessive wear and may also make the
drive belt fall off the pulley.
Test Description
The number(s) below refer to the step number(s) on
the diagnostic table.
2. The inspection is to verify the drive belt(s) is
correctly installed over all of the drive belt pulleys.
Wear on the drive belt may be caused by
mis-positioning the drive belt by one groove on a
pulley.
Engine
3. The installation of a drive belt that is to wide or to
narrow will cause wear on the drive belt. The
drive belt ribs should match all of the grooves on
all of the pulleys.
4. This inspection is to verify the drive belt is not
contacting any parts of the engine or body
while the engine is operating. There should be
sufficient clearance when the drive belt accessory
drive components load varies. The drive belt
should not come in contact with an engine or a
body component when snapping the throttle.
Drive Belt Excessive Wear Diagnosis
Step Action
Yes
No
Notice: Refer to Belt Dressing Notice in Cautions and Notices.
DEFINITION: Wear at the outside ribs of the drive belt due to an incorrectly installed drive belt.
1
Did you review the Symptoms - Drive Belt diagnostic information and Go to Symptoms -
perform the necessary inspections? Go to Step2 Drive Belt
Inspect the drive belt(s) for the proper installation. Refer to Drive Belt
2
Replacement.
Did you find this condition?
Go to Step 5 Go to Step 3
3
Inspect for the proper drive belt.
Did you find this condition? Go to Step 5 Go to Step 4
Inspect for the drive belt rubbing against a bracket, hose, or wiring
4
harness.
Did you find and repair the condition?
5
Replace the drive belt. Refer to Drive Belt Replacement.
Did you complete the replacement?
6
Run the engine in order to verify the repair.
Is there still excessive drive belt wear?
Drive Belt Tensioner Diagnosis
Important: When the engine is operating, the belt
tensioner arm will move. Do not replace the belt
tensioner because of movement in the belt
tensioner arm.
Notice: Allowing the drive belt tensioner to snap into
the free position may result in damage to the
tensioner.
1. Remove the drive belt. Refer to Drive Belt
Replacement.
2. Position a hex-head socket on the drive belt
tensioner arm and rotate the arm
counterclockwise.
Go to
Go to Step 6
Diagnostic Aids
-
Go to Step 6
-
System OK
3. Move the drive belt tensioner through it's full
travel.
" The movement should feel smooth
• There should be no binding.
• The tensioner should return freely.
4. If any binding is observed, replace the drive belt
tensioner. Refer to Drive Belt Tensioner
Replacement.
5. Install the drive belt. Refer to Drive Belt
Replacement.
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