Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Disassembly And Assembly Of Subassemblies: Piston: Assembly
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NOTE: Align the piston-to-connecting rod orientation marks made during disassembly.
Install the piston to the connecting rod.
- Lubricate with clean engine oil and install the piston pin.
Material: Motorcraft ® SAE 5W-30 Synthetic Blend Motor Oil / XO-5W30-QSP (WSS-M2C946-A)
- Install new piston pin retainers.
- Lubricate with clean engine oil and install new piston rings.
Material: Motorcraft ® SAE 5W-30 Synthetic Blend Motor Oil / XO-5W30-QSP (WSS-M2C946-A)
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NOTE: Align the piston rings on the piston.
- Upper oil control segment ring gap location.
- Oil control spacer gap location.
- Lower oil control segment ring gap location.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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