Checking Oil Pressure; Checking Cylinder Head Flatness; Checking Cylinder Head Flatness: Straight Edge Placement - Ford 6.4L Power Stroke Manual

Do Not Allow The Straight Edge To
Short Direction
Contact The Red Shaded Area
(correct)
Uniq Ue s er v ic e P roce d Ure s
Test Port (EOP)
Longitudinal Direction
(incorrect)

Checking Oil Pressure

• Remove the engine oil pressure sensor
(EOP) from the oil cooler.
• Install an adapter fitting into the port where the EOP
was and install an approved oil pressure gauge.
• Follow the proper service procedures
for checking oil pressure.
• The thread size for the opening is 7/16 - 20.

Checking Cylinder Head Flatness

• Checking cylinder head flatness for the 6.4L engine
is carryover from the late 6.0L procedure.
• Check flatness across the short direction
(perpendicular to the longitudinal) of the head.
• Use a straight edge that is calibrated by the manufacturer
to be flat within 0.0002 in. per running foot length.
• Set the 0.002" feeler guage on each measurement
point (refer to the service procedure graphic in
the Ford workshop manual) with the straight edge
perpendicular to the longitudinal and not across the
area that contains the smaller head bolt holes. Set
the straight edge on top of the feeler gauge.
• Use a firm steady force to properly hold the straight edge
on top of the feeler gauge. Pull lightly on the feeler guage.
• The head is locally out of flat, and needs replaced
if the 0.002" feeler gauge is loose and easily
slides out from under the straight edge.
Checking Cylinder Head Flatness:
Straight Edge Placement
• Never lay the straight edge across the area shaded in red.
• Do not check flatness in the longitudinal
direction. Check flatness in the short
(perpindicular to longitudinal) direction only.
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