Technical Service Bulletins

Cracked Lincoln Skirt

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Cracked Lincoln Skirt

Some 2015-2017 Lincoln Navigator vehicles equipped with a 3.5L EcoBoost engine with greater than 20,000 miles may exhibit a tick type noise from the cylinder block area. This noise may be caused by a cracked piston skirt.

The noise can be isolated to a cylinder using a stethoscope or other suitable listening device. Cancelling the affected cylinder will reduce or eliminate the noise. If the noise is isolated to a specific cylinder, it is recommended to replace the short block.

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