Disassembly And Assembly Of Subassemblies: Piston: Assembly
WARNING: This page is about a different variant/trim than selected.
- 1.
- 1.
Identification mark for LH or RH piston.
- 2.
Arrow on the top of the dome of the piston should be facing toward the front of the engine block
- 3.
Bump on connecting rod should be facing toward the front of the engine block
- 1.
- 3.
Lubricate and install the piston pin.Material: Motorcraft ® SAE 5W-50 Full Synthetic Motor Oil / XO-5W50-QGT (WSS-M2C931-C)
- 4.NOTE: The piston pin retainer gap orientation must be toward the bottom of the piston.
Install the piston pin retainers.
- 5.
Lubricate and install the oil control rings.- 1.
Lower oil control ring.Material: Motorcraft ® SAE 5W-50 Full Synthetic Motor Oil / XO-5W50-QGT (WSS-M2C931-C)
- 2.
Oil control expander ring.
- 3.
Upper oil control ring.
- 1.
- 6.
Install the lower compression ring.- 1.
The identification mark on the ring pointing up toward the top of the piston.
- 2.
Hook feature will point down toward the bottom of piston.Material: Motorcraft ® SAE 5W-50 Full Synthetic Motor Oil / XO-5W50-QGT (WSS-M2C931-C)
- 1.
- 7.
Install the upper compression ring.- 1.
The identification mark on the ring pointing up toward the top of the piston.Material: Motorcraft ® SAE 5W-50 Full Synthetic Motor Oil / XO-5W50-QGT (WSS-M2C931-C)
- 1.
- 8.
Position the piston ring gaps.- 1.
Upper compression ring gap.
- 2.
Lower compression ring gap.
- 3.
Upper oil control ring gap.
- 4.
Oil control expander ring gap (Center line of the piston parallel to the wrist pin bore).
- 5.
Lower oil control ring gap.
- 1.