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 MANUALSJEEP2009WRANGLER 2WD V6-3.8LREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER BLOCK ASSEMBLYPISTON, ENGINE
2009 Jeep Wrangler 2WD V6-3.8L
Piston, Engine
2009 Jeep Wrangler 2WD V6-3.8LSECTION Piston, Engine
PISTONS
Piston Diameter 3.8L-Measured33.01 mm (1.30 in) From Piston Top 95.968-95.998 mm. (3.778-3.779 in.)
Clearance in Bore @ Size Location (New) -0.005-0.039 mm (-0.0002-0.0015 in.)
Weight 3.8L 426 ± 5 grams (15.03 ± 0.1764 oz.)
Piston Diameter 3.8L-Measured33.01 mm (1.30 in) From Piston Top 95.968-95.998 mm. (3.778-3.779 in.)
Clearance in Bore @ Size Location (New) -0.005-0.039 mm (-0.0002-0.0015 in.)
Weight 3.8L 426 ± 5 grams (15.03 ± 0.1764 oz.)
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.