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 MANUALSINFINITI2013G37 CONVERTIBLE V6-3.7L (VQ37VHR)REPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTENGINESERVICE AND REPAIROVERHAULHOW TO SELECT PISTON AND BEARINGPISTON
2013 Infiniti G37 Convertible V6-3.7L (VQ37VHR)
Piston
2013 Infiniti G37 Convertible V6-3.7L (VQ37VHR)SECTION Piston
HOW TO SELECT PISTON AND BEARING
Piston
WHEN NEW CYLINDER BLOCK IS USED
Check the cylinder bore grade ("1", "2" or "3") on rear side of cylinder block, and select piston of the same grade.
NOTE:
Piston is available with piston pin as a set for the service part. (Only "0" grade piston pin is available.)
WHEN CYLINDER BLOCK IS REUSED
1.Measure the cylinder bore inner diameter. Refer to "Inspection" Inspection.
2.Determine the bore grade by comparing the measurement with the values under the cylinder bore inner diameter of the "PISTON SELECTION TABLE".
3.Select piston of the same grade.
PISTON SELECTION TABLE
Unit: mm (in)
NOTE:
- Piston is available together with piston pin as assembly.
- Piston pin (piston pin hole) grade is provided only for the parts installed at the plant. For service parts, no piston pin grades can be selected. (Only "0" grade is available.)
- No second grade mark is available on piston.
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.