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 MANUALSCHEVROLET2006HHR L4-2.4LREPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTENGINECYLINDER BLOCK ASSEMBLYPISTONSPECIFICATIONS
2006 Chevrolet HHR L4-2.4L
Piston: Specifications
2006 Chevrolet HHR L4-2.4LSECTION Specifications
Piston - Piston Diameter - @14.5 mm up 85.967-85.982 mm (3.3845-3.3851 inch)
Piston - Piston Pin Bore Diameter 20.002-20.007 mm (0.07875-0.7877 inch)
Piston - Piston Ring Grove Width - Top 1.23-1.25 mm (0.0484-0.0492 inch)
Piston - Piston Ring Grove Width - Second 1.52-1.54 mm (0.0598-0.0606 inch)
Piston - Piston Ring Grove Width - Oil Control 2.52-2.54 mm (0.0992-0.1000 inch)
Piston - Piston To Bore Clearance 0.010-0.041 mm (0.0004-0.0016 inch)
Piston - Piston Pin Bore Diameter 20.002-20.007 mm (0.07875-0.7877 inch)
Piston - Piston Ring Grove Width - Top 1.23-1.25 mm (0.0484-0.0492 inch)
Piston - Piston Ring Grove Width - Second 1.52-1.54 mm (0.0598-0.0606 inch)
Piston - Piston Ring Grove Width - Oil Control 2.52-2.54 mm (0.0992-0.1000 inch)
Piston - Piston To Bore Clearance 0.010-0.041 mm (0.0004-0.0016 inch)
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.