Cylinder head distortion

SPECIAL TOOL(S)

GFD56518

Courtesy of FORD MOTOR COMPANY

Feeler gauge set 303-d027 (d81l-4201-a) or equivalent

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 in illustration.

Fig 1: Inspection Of Cylinder Head For Flatness In Sequence

GFD56548

Courtesy of FORD MOTOR COMPANY