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 MANUALSCHEVROLET2003MALIBU V6-3.1L VIN JREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER BLOCK ASSEMBLYPISTON, ENGINE
2003 Chevrolet Malibu V6-3.1L VIN J
Piston, Engine
2003 Chevrolet Malibu V6-3.1L VIN JSECTION Piston, Engine
PISTON
Diameter-Gaged on the skirt 12 mm (0.47 inch)
below the centerline of the piston pin bore 88.981 - 89.009 mm (3.5029 - 3.5040 in)
Clearance 0.07 - 0.053 mm (0.0013 - 0.0027 in)
Pin Bore 23.006 - 23.013 mm (0.9057 - 0.9060 in)
PISTON RING
Top Groove Side Clearance 0.04 - 0.086 mm (0.002 - 0.0033 in)
Second Groove Side Clearance 0.04 - 0.09 mm (0.002 - 0.0035 in)
Top Ring Gap 0.15 - 0.36 mm (0.006 - 0.014 inch)
Second Ring Gap 0.5 - 0.71 mm (0.0197 - 0.0280 inch)
Oil Ring Groove Clearance 0.046 - 0.201 mm (0.008 in)
Gap with segment at 89.0 mm 3.50 inch 0.25 - 1.27 mm (0.0098 - 0.05 in)
PISTON PIN
Diameter 22.9915 - 22.9964 mm (0.9052 - 0.9054 in)
Clearance In Piston 0.0096 - 0.0215 mm (0.0004 - 0.0008 in)
Fit In Rod (-0.0469) - (0.017) mm
(Press fit) (0.0006 -0.0018 in)
Diameter-Gaged on the skirt 12 mm (0.47 inch)
below the centerline of the piston pin bore 88.981 - 89.009 mm (3.5029 - 3.5040 in)
Clearance 0.07 - 0.053 mm (0.0013 - 0.0027 in)
Pin Bore 23.006 - 23.013 mm (0.9057 - 0.9060 in)
PISTON RING
Top Groove Side Clearance 0.04 - 0.086 mm (0.002 - 0.0033 in)
Second Groove Side Clearance 0.04 - 0.09 mm (0.002 - 0.0035 in)
Top Ring Gap 0.15 - 0.36 mm (0.006 - 0.014 inch)
Second Ring Gap 0.5 - 0.71 mm (0.0197 - 0.0280 inch)
Oil Ring Groove Clearance 0.046 - 0.201 mm (0.008 in)
Gap with segment at 89.0 mm 3.50 inch 0.25 - 1.27 mm (0.0098 - 0.05 in)
PISTON PIN
Diameter 22.9915 - 22.9964 mm (0.9052 - 0.9054 in)
Clearance In Piston 0.0096 - 0.0215 mm (0.0004 - 0.0008 in)
Fit In Rod (-0.0469) - (0.017) mm
(Press fit) (0.0006 -0.0018 in)
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.