2003 FORD MUSTANG Workshop Manual

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Page 2009 of 4378

FORD MUSTANG 2003 Workshop Manual 7 6B209 Drive belt tensioner
8 19A216 Belt idler pulley
9 19A216 Belt idler pulley Klj . 2 ba
22003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/

Page 2010 of 4378

FORD MUSTANG 2003 Workshop Manual DESCRIPTION AND OPERATION
Accessory Drive —
Cobra
Component Locations — Supercharger Accessory Drive Component Location — Accessory Drive SECTION 303-
05: Accessory Drive 2003 Mustang Worksh

Page 2011 of 4378

FORD MUSTANG 2003 Workshop Manual Item Part Number Description
1 8678 Belt idler pulley
2 8678 Belt idler pulley
3 8678 Belt idler pulley
4 3A733 Power steering pulley
5 10344 Coolant pump pulley
6 6C254 Crankshaft

Page 2012 of 4378

FORD MUSTANG 2003 Workshop Manual Klj . 3 ba
32003 Mustang Workshop Manual
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FORD MUSTANG 2003 Workshop Manual DIAGNOSIS AND TESTING
Accessory Drive
Inspection and Verification
1. Verify customer concern by running the engine.
2. Inspect the drive belt for chunking, fraying and wear.
3. Check the drive be

Page 2014 of 4378

FORD MUSTANG 2003 Workshop Manual Component Tests
Drive Belt Noise/Flutter
Drive belt chirp occurs due to pulley misalignment or excessive pulley runout. It can be the result of a
damaged pulley or an incorrectly aligned pulley.
T

Component Tests
Drive Belt Noise/Flutter
Drive belt chirp occurs due to pulley misalignment or excessive pulley runout. It can be the result of a
damaged pulley or an incorrectly aligned pulley.
To correct, determine the area where the noise comes from. Check each of the pulleys in that area
with a straightedge to the crankshaft pulley, looking for accessory pulleys out of position in the fore/aft
direction or at an angle to the straightedge.
Drive belt squeal is an intermittent noise that occurs when the drive belt slips on a pulley during certain
conditions, such as: engine start up, rapid engine acceleration, or A/C clutch engagement.
Drive belt squeal can occur:
zif any of the accessories are damaged, have a worn or damaged bearing, internal torsional
resistance above normal. All accessories should be rotatable by hand in the unloaded condition.
If not, inspect the accessory.
z if fluid gets on the drive belt. This includes power steering fluid, engine coolant, engine oil or air
conditioning system lubricant. If fluid does get on the drive belt during service, clean the drive
belt with soap and water and thoroughly rinse with clean water.
z NOTE: The drive belt tensioner arm should rotate freely without binding.
if the drive belt is too long. A drive belt that is too long will allow the drive belt tensioner arm to
go all the way to the arm travel stop under certain load conditions, which will release tension to
the drive belt. If the drive belt tensioner indicator is outside the installation wear range window,
install a new drive belt.
z if the drive belt tensioner is worn or damaged.
Belt Tension
NOTE: Drive belt tension is not adjustable.
The drive belt tensioner automatically adjusts drive belt tension. Symptom Chart Condition
Possible Sources Action
z Drive belt
noise, chirping,
flutter z
Defective/worn drive
belt.
z Misaligned pulley.
z Pulley runout.
z Damaged
accessories.
z Fluid contamination
of drive belt. z
GO to Component Tests, Drive
Belt, Noise/Flutter.
z Damaged or worn
drive belt tensioner. z
GO to Component Tests, Belt
Tensioner, Automatic.
z Premature
drive belt wear z
Defective drive belt.
z Misaligned pulley.
z Pulley runout.
z Damaged
accessories.
z Incorrectly installed
drive belt. z
GO to Component Tests, Drive
Belt Noise/Flutter and Drive
Belt Misalignment diagnosis. Klj . 2 ba
42003 Mustang Workshop Manual
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Page 2015 of 4378

FORD MUSTANG 2003 Workshop Manual Belt Tensioner, Automatic
Check the automatic drive belt tensioner:
1. With the engine off, check for correct drive belt routing; refer to Accessory Drive . Repair as
necessary.
2. Rotate the dr

Page 2016 of 4378

FORD MUSTANG 2003 Workshop Manual Klj . 4 ba
42003 Mustang Workshop Manual
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