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 MANUALSFORD2021EXPEDITION PLATINUM, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 196 (ENGINE SYSTEM - GENERAL INFORMATION)GENERAL PROCEDURESPISTON PROTRUSION CHECK
2021 Ford Expedition Platinum, RWD
Piston Protrusion Check
2021 Ford Expedition Platinum, RWDSECTION Piston Protrusion Check
WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty, 2019 Ford F-450 Super Duty, 2019 Ford F-350 Super Duty, and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
For information on Ford Color Coded Illustrations, refer to OEM COLOR CODING
Special Tool(s) / General Equipment
| Dial Indicator |
|---|
Check
- Verify that the cylinder block deck surface and the pistons are clean.
- The piston protrusion is measured in-line front and rear avoiding raised or etched marking.
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NOTE: Use a commercially available deck bridge such as the Proform® 66797 Magnetic Deck Bridge or equivalent.
- Using the dial indicator and a commercially available deck bridge, position at one of the points on the cylinder block deck surface.. Use the General Equipment: Dial Indicator
- Zero the dial indictor on the cylinder block deck surface.
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NOTE: Only rotate the crankshaft clockwise.
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.