Technical Service Bulletins

Head Gasket Leak Due to Block Surface

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Head Gasket Leak Due to Block Surface

Some 2014-2019 Ford Fusion and 2017-2019 Escape vehicles equipped with a 1.5L Ecoboost engine may exhibit coolant consumption and a white smoke concern.

Follow the cooling system pressure test procedure in the workshop manual, section 303-03. Pressurize the cooling system to 20 psi and hold for 5 hours.

If cooling system pressure drops 4 psi after 5 hours, and internal engine coolant loss is confirmed, further investigation of the engine block surface to head gasket interface is required.

Carefully inspect engine block cylinders and cylinder bore bridges for erosion, pitting and surface waviness. If defects with the cylinder block surface are identified, follow workshop manual section 303-01A procedures. Determine the most cost-effective way to complete the repair.

Ford has found that all returned cylinder heads pass inspection and may have been reused.

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