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 MANUALSFORD2021EDGE SE, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 647 (ENGINE - 3.5L ECOBOOST (BM) PART 1)SPECIFICATIONSPISTON AND CONNECTING ROD
2021 Ford Edge SE, 4WD
Piston and Connecting Rod
2021 Ford Edge SE, 4WDSECTION Piston and Connecting Rod
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
| Item | Specification |
|---|---|
| Piston diameter | 3.6388 -3.6394 in (92.426 -92.44 mm) |
| Piston-to-cylinder bore clearance (at grade size) | 0.0024 -0.0037 in (.06 -.094 mm) |
| Piston ring end gap - compression (top, gauge diameter) | 0.0079 -0.0118 in (.2 -.3 mm) |
| Piston ring end gap - compression (bottom, gauge diameter) | 0.0157 -0.0276 in (.4 -.7 mm) |
| Piston ring end gap -- oil ring (steel rail, gauge diameter) | 0.0059 -0.0177 in (.15 -.45 mm) |
| Piston ring groove width - compression (top) | 0.0602 -0.0610 in (1.53 -1.55 mm) |
| Piston ring groove width -- compression (bottom) | 0.0406 -0.0413 in (1.03 -1.05 mm) |
| Piston ring groove width - oil ring | 0.0799 -0.0807 in (2.03 -2.05 mm) |
| Piston ring width - upper compression ring | 0.0579 -0.0587 in (1.47 -1.49 mm) |
| Piston ring width - lower compression ring | 0.0382 -0.0390 in (.97 -.99 mm) |
| Piston ring-to-groove clearance (upper and lower compression rings) | 0.0016 -0.0031 in (.04 -.08 mm) |
| Piston pin bore diameter | 0.9057 -0.9058 in (23.004 -23.008 mm) |
| Piston pin diameter | 0.9053 -0.9055 in (22.995 -23 mm) |
| Piston pin length | 2.3071 -2.3189 in (58.6 -58.9 mm) |
| Piston pin-to-piston fit | 0.0002 -0.0005 in (.004 -.013 mm) |
| Connecting rod-to-pin clearance - standard | 0.0001 -0.0008 in (.003 -.02 mm) |
| Connecting rod pin bore diameter | 0.9056 -0.9061 in (23.003 -23.015 mm) |
| Connecting rod length (center-to-center) | 6.01 in (152.68 mm) |
| Connecting rod maximum allowed bend | 0.0015 in (.038 mm) |
| Connecting rod maximum allowed twist | 0.0020 in (.05 mm) |
| Connecting rod bearing bore diameter - single bore grade | 2.3570 -2.3576 in (59.869 -59.883 mm) |
| Connecting rod bearing-to-crankshaft clearance | 0.0008 -0.0021 in (.02 -.054 mm) |
| Connecting rod side clearance (assembled to crank) - service limit | 0.0167 in (.425 mm) |
RENDER: 1.0x
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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.