Section 03-00: Engine—Service | 1993 Mustang Workshop Manual |
Tools Required:
Cleaning
Clean the push rods in a suitable solvent. Blow out the oil passage in the push rods with compressed air.
Inspection
Check the ends of the push rods for nicks, grooves, roughness or excessive wear. Replace damaged push rods.
The push rods can be visually checked for straightness while they are
installed in the engine by rotating them with the valve closed. They also can
be checked with a Rotunda Dial Indicator with Bracketry 014-00282 or equivalent. 
CAUTION: Do not attempt to straighten push rods.
If the push rod is bent beyond specifications, it should be replaced.