Suzuki XL7 2007 Service Manual page 376

1D-36 Engine Mechanical:
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 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.
Inspecting 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 a dent 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.
This test is to verify that the drive belt tensioner operates
properly. If the drive belt tensioner is not operating
properly, proper belt tension may not be achieved to
keep the drive belt from slipping which could cause a
squeal noise.
Step
CAUTION
!
Refer to "Belt Dressing Notice: ".
DEFINITION: The following items are indications of chirping:
• A high pitched noise that is heard once per revolution of the drive belt or a pulley.
• Chirping may occur on cold damp start-ups and will subside once the vehicle reaches normal operating temp.
DEFINITION: The following items are indications of drive belt squeal:
• A loud screeching noise that is caused by a slipping drive belt. This is unusual for a drive belt with multiple ribs.
• The noise occurs when a heavy load is applied to the drive belt, such as an air conditioning compressor
engagement snapping the throttle, or slipping on a seized pulley or a faulty accessory drive component.
DEFINITION: The following items are indications of drive belt whine:
• A high pitched continuous noise.
• The noise may be caused by an accessory drive component failed bearing.
Did you review the Drive Belt Symptom operation and perform
1
the necessary inspections?
Verify that there is a chirping, squeal or whine noise.
2
Does the engine make the chirping squeal or whine noise?
1. Remove the drive belt.
If the engine has multiple drive belts, remove the belts one
at a time and perform the test below each time a belt is
removed.
3
2. Operate the engine for no longer than 30-40 seconds.
3. Repeat this test if necessary by removing the remaining
belt(s).
Does the chirping, squeal or whine noise still exist?
If diagnosing a chirping noise, inspect for severe pilling
exceeding 1/3 of the belt groove depth.
4
If diagnosing a squeal or whine noise, proceed to step 13.
Do the belt grooves have pilling?
15.
This test is to verify that the drive belt is not too long,
which would prevent the drive belt tensioner from
working properly. Also if an incorrect length drive belt
was installed, it may not be routed properly and may be
turning an accessory drive component in the wrong
direction.
16.
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 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.
17.
This test is to verify that the pulleys are the correct
diameter or width. Using a known good vehicle compare
the pulley sizes.
19.
Replacing the drive belt when it is not damaged or there
is not excessive pilling will only be a temporary repair.
Action Yes
Go to "Symptoms -
Go to Step 2
Engine Mechanical"
Go to Step 3 Go to Diagnostic Aids
Go to "Symptoms -
Engine Mechanical"
Go to Step 5
No
Go to Step 4
Go to Step 6