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- TICKING AND / OR KNOCKING NOISE / STARTUP RATTLE FROM ENGINE - 4.6L / 5.4L 3V
| Publication Date: September 13, 2006 |
| 2005 Mustang |
2005 Expedition, F-250, F-350
| 2005 Navigator |
This article supersedes TSB 06-4-7 to update the Service Procedure.
Some vehicles equipped with a 4.6L 3-valve or 5.4L 3-valve engine may exhibit a ticking and / or knocking noise after reaching normal operating temperature, or a rattle upon starting. The noise may be described as ticks, taps, knocks, or thumps. In some cases the noise may be a normal characteristic of these engines. In other cases the noise may require further investigation. Sorting out and defining the noise as reported by the customer is important to successfully diagnose and / or repair the condition.
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