GMC chevrolet camaro 2000 Service Manual page 802

Engine
Engine Mechanical - 3.8l 6-35
Drive Belt Squeal Diagnosis
Step
Action
Yes
No
Notice: Refer to Belt Dressing Notice in Cautions and Notices.
DEFINITION: The following items are indications of drive belt squeal:
• A
loud screeching noise that is caused. by .a slipping drive belt (this is unu.sual for a drive belt with multipie ribs)
• The noise occurs when a heavy load is applied to the drive belt, such as an air conditioning compress9r engagement
snapping the throttle, or slipping on a seized pulley or a faulty accessory drive.component.
1
Did you review the Symptoms - Drive Belt diagnostic information and Go to Symptoms -
perform the necessary inspections? ·
.
GotoStep2
.
Drive Belt.
..·
2
Verify that there is a squeal noise.
Go to
Does the engine make the squeal noise? Go to Step 3 Diagnostic Aids
1. Remove the drive belt.
Go to Engine Noise
3
2. Operate the engine for no longer than 30 to 40 seconds.
Diagnosis (Base
..
Does the squeal noise still exist?
· Engine)
G.o to Step' 4
Inspect for an accessory drive component seized bearing or a faulty
4
accessory drive component.
Did you find and correct the condition? Go to Step 9
.Go to Step 5
Inspect the drive belt tensioner for proper operation. Refer to Drive
5
Belt Tensioner Diagnosis.
'
Did.you find.and correct thE:J condition? Goto Step 9 .. Go to Step 6
Check for the correct drive belt length. Refer.to Drivf?. BfJlt
6
Replacement.
Did you find and correct the condition?· Gcrto Step 9 · Go· to Step 7
7
'Inspect for misalignment of a pulley.
Did you find and correct the condition?
Go tc:> Step 9 Go to Step 8
)
8
Inspect for the correct pulley size.
'
Go to
Did you find and correct the condition? Go to Step 9. Diagnostic Aids
9
Run the engine in order to verify the repair.
Does the drive belt still squeal?
Go. toStep3
System OK