4. If the cause is not visually evident, verify the symptom and refer to the Symptom Chart.
Symptom Chart
Symptom | Possible Sources | Action |
|---|
Accessory drive belt Accessory drive Use a stethoscope or other listening device to noise system determine the source of the noise. INSTALL new
components as necessary. TEST the system for normal operation.
Accessory drive belt CHECK the accessory drive belt is correctly incorrectly installed. installed in the pulley grooves. INSTALL a new
accessory drive belt as necessary. REFER to: Accessory Drive Belt (303-05C Accessory Drive - 5.0L 32V Ti-VCT/5.0L Ti-VCT
V8 (308kW/418PS), Removal and Installation). TEST the system for normal operation.
Pulley(s). CHECK the pulley(s) for damage, freedom of
rotation, stone entrapment and alignment. INSTALL new components as necessary. TEST the system for normal operation.
Lubricant or other CHECK the accessory drive belt for contamination. contamination or damage. RECTIFY the source
of the leak and INSTALL a new accessory drive belt. REFER to: Accessory Drive Belt (303-05C Accessory Drive - 5.0L 32V Ti-VCT/5.0L Ti-VCT
V8 (308kW/418PS), Removal and Installation). TEST the system for normal operation.
NOTE: Chirp is Pulley misalignment CHECK that the accessory drive belt is running defined as a (usually evident at centrally on the flat pulleys. TEST the system for twittering noise, often idle). normal operation. intermittent CHECK the pulleys for excessive end float and Accessory drive belt bent flanges. chirp 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.
NOTE: Rattle is Loose components CHECK the components or hardware for correct defined as a metallic or hardware. installation and tighten as necessary. TEST the knocking noise system for normal operation. Accessory drive belt
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.