F 350 4WD Pickup V8-351 5.8L VIN H EFI (1997)
Piston Ring: Testing and Inspection
End Gap
1. Check the piston ring end gap specification. Using a feeler gauge, check the piston ring end gap.
2. If the ring gap is too small, the ring will have to be filed until the end gap is within specifications. The use of a ring filing block helps to ensure that
the ring ends are filed square.
3. Using a piston ring expander, install the piston rings starting with the oil control rings. Make sure rings are installed right side up. Refer to
instructions with the ring set.
CAUTION: Install the piston rings after the piston has been installed on the connecting rod. Since the piston can be supported by the crown
during this operation, the rings could be damaged. Use a piston ring expander to install the piston rings. Attempting to wind them on by hand can
put a deep scratch in the piston or break the ring.
4. Rotate the rings so the end gaps are not lined up but are spaced properly as shown.
