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.
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HOMESERVICE MANUALSMERCURY2009MILAN PREMIER, 3.0 1, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1450 (ENGINE MECHANICAL - 3.5L)DISASSEMBLY AND ASSEMBLY OF SUBASSEMBLIESPISTONASSEMBLY
2009 Mercury Milan Premier, 3.0 1, AWD
Disassembly And Assembly Of Subassemblies: Piston: Assembly
2009 Mercury Milan Premier, 3.0 1, AWDSECTION Assembly
WARNING: This page is about a different car, the 2010 Lincoln MKZ and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
- Align the piston-to-connecting rod orientation marks and position the connecting rod in the piston.
- Lubricate the piston pin and pin bore with clean engine oil.
- Install the piston pin in the piston and connecting rod assembly.
- Install the new piston pin retaining clips in the piston.
- The piston pin retaining clip gap orientation must be toward the top or dome of piston.
- Lubricate the piston and the new piston rings with clean engine oil.
- Install the piston rings onto the piston as shown in illustration.
- Center line of the piston parallel to the wrist pin bore
- Upper compression ring gap location
- Upper oil control segment ring gap location
- Lower oil control segment ring gap location
- Expander ring and lower compression ring gap location
NOTE: The piston compression upper and lower ring should be installed with the "O" mark on the ring face pointing up toward the top of the piston.
RENDER: 1.0x
NO RELATED
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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.