Engine - Squeal/Chirp On Cold Start Up
TSB 09-7-704/20/09
4.0L ENGINE BELT SQUEAL OR CHIRP NOISE ON
COLD STARTUP
FORD:
2009 Mustang
2007-2008 Explorer Sport Trac, Explorer
MERCURY:
2007-2008 Mountaineer
ISSUE
Some 2007-2008 Explorer, Explorer Sport Trac, Mountaineer and 2009 Mustang vehicles equipped with a 4.0L engine may exhibit a belt squeal or belt chirp from the front end accessory drive (FEAD) belt near the power steering pulley area.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
NOTE
UNDER NO CIRCUMSTANCES SHOULD THE ACCESSORY DRIVE BELT, TENSIONER OR PULLEYS HAVE ANY FLUIDS OR BELT DRESSING APPLIED TO THEM AS DAMAGE TO THE BELT MATERIAL AND TENSIONER DAMPING MECHANISM MAY OCCUR.
1. Visually inspect all related FEAD components for damage and or abnormal wear. Reference the online Work Shop Manual (WSM), Section 303-05. If no concerns found, proceed to Step 2.
2. Inspect for FEAD belt clearance on the idler pulley. A properly aligned belt will have an approximate 3/32" (2 mm) space behind the belt on the idler pulley. (Figure 1)
a. If there is not an approximate 3/32" (2 mm) gap, proceed with Step 3.
b. If there is an approximate 3/32" (2 mm) gap, proceed with Step 5.
3. Verify the generator bracket and idler pulley are properly seated and torqued to specification. Reference the online (WSM), Section 303-05.
a. If they are not properly seated or torqued to specification, after correcting them, remeasure the gap per Step 2.
(1) If the gap is still not 3/32" (2 mm), proceed to Step 4.
(2) If there is an approximate 3/32" (2 mm) gap, proceed to Step 5.
b. If no concerns are found with fit or torque, proceed to Step 4.
4. Replace the generator bracket with updated bracket. Reference online (WSM), Section 303-01. Proceed to Step 5.
5. Replace the accessory drive belt with the updated belt part number. Reference online (WSM), Section 303-05.
Parts Block
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.
OPERATION DESCRIPTION TIME
090707A 2009 Mustang, 2007-2008 0.3 Hr.
Explorer, Explorer Sport
Trac, Mountaineer 4.0L:
Inspect And Replace
FEAD Belt Includes Time
For Measurements (Do Not
Use With 10346A, 6209A,
8678A, 8620F)
090707B 2009 Mustang, 2007-2008 0.8 Hr.
Explorer, Explorer Sport
Trac, Mountaineer 4.0L:
Inspect And Replace
Alternator Bracket And
FEAD Belt Includes Time
For Measurements (Do Not
Use With 10346A, 6209A,
8678A, 8620F)
DEALER CODING
CONDITION
BASIC PART NO. CODE
10A313 07
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