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 MANUALSFORD1999EXPLORER 4WD V6-4.0L VIN EREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER BLOCK ASSEMBLYPISTON, ENGINE
1999 Ford Explorer 4WD V6-4.0L VIN E
Piston, Engine
1999 Ford Explorer 4WD V6-4.0L VIN ESECTION Piston, Engine
| Bore Clearance Selective Fit | 0.0012 - 0.002 |
| Diameter - coded STD | 3.952 - 3.9528 |
| Diameter - coded .5 mm | 3.972 |
| Diameter - coded 1.0 mm | 3.990 - 3.991 |
| Pin bore diameter (Red) | 0.945 |
| Pin Bore Diameter (Blue) | 0.945 |
| Top ring groove width | 0.0705 - 0.0713 |
| Oil ring groove width | 0.1378 - 0.1399 |
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.