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Cylinder Head Distortion

WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

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Special Tool(s) / General Equipment 

Feeler Gauge

Check 

NOTE: Refer to the appropriate Engine article for the specification.
  1. NOTE: Make sure all cylinder head surfaces are clear of any gasket material, silicone sealant, oil and coolant. The cylinder head surface must be clean and dry before running a flatness check.
    NOTE: Use a Straightedge that is calibrated by the manufacturer to be flat within 0.005 mm (0.0002 in) per running foot of length, such as Snap-On ® GA438A or equivalent. For example, if the Straightedge is 61 cm (24 in) long, the machined edge must be flat within 0.010 mm (0.0004 in) from end to end.

    Using a Straightedge and a Feeler Gauge Set, inspect the cylinder head for flatness in the sequence shown. Use the General Equipment: Feeler Gauge

GFD201185Courtesy of FORD MOTOR COMPANY