303-05-1 5 Accessory Drive 303-05-1 5
DIAGNOSIS AND TESTING
Symptom
N0TE:Chirp is defined as a twit-
tering noise, often intermittent
Accessory drive belt chirp Possible
Sources Action
Accessory drive belt idler pulley
bearing failure.
Pulley misalignment (usually
evident at idle). REMOVE
the accessory drive
belt.
REFER to: Accessory Drive
Belt
- 1.3L Duratec-8V
(Rocam) (303-05 Accessory
Drive, Removal and Installa-
tion)
I Accessory Drive Belt - 1.4L
Duratorq-TDCi (DV) Diesel
(303-05 Accessory Drive,
Removal and Installation)
I Accessory Drive Belt - I .6L
Duratorq-TDCi (DV) Diesel
(303-05 Accessory Drive,
Removal and Installation)
I Accessory Drive Belt - 2.OL
Duratec-HE (M14) (303-05
Accessory Drive, Removal
and Installation).
INSPECT the idler
pulley(s) for
smooth rotation. INSTALL a
new idler
pulley(s) as neces-
sary. TEST the system for
normal operation.
CHECK that the accessory
drive belt is running centrally
on the flat pulleys. TEST the
system for normal operation.
CHECK the pulleys for
excessive end float and bent
flanges.
With the engine running at idle,
use a stethoscope to identify
the source of the noise.
INSTALL new components as
necessary. TEST the system
for normal operation.
2006.0 Fiesta 121~oo6 G346263en
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