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 MANUALSFORD2018EXPEDITION LIMITED, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 23 (ENGINE SYSTEM - GENERAL INFORMATION)GENERAL PROCEDURESPISTON INSPECTION
2018 Ford Expedition Limited, RWD
Piston Inspection
2018 Ford Expedition Limited, RWDSECTION Piston Inspection
WARNING: This page is about a different car, the 2016 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
Special Tool(s)
| Scraper, Piston Ring Groove 303-D033 (D81L-6002-D) or equivalent |
NOTE:
Do not use a caustic cleaning solution or a wire brush to clean the pistons or damage can occur.
- 1.
Clean and inspect the (1) ring lands, (2) skirts, (3) pin bosses and the (4) tops of the pistons. If wear marks, scores or glazing is found on the piston skirt, check for a bent or twisted connecting rod.
- 2.
Use the Piston Ring Groove Scraper to clean the piston ring grooves.- Make sure the oil ring holes are clean.
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.