Mountaineer RWD V6-4.0L (2008)
Drive Belt: All Technical Service Bulletins
Engine - Squeal/Chirp On Cold Start Up
TSB 09-7-7
04/20/09
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.
