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 MANUALSCHEVROLET2004AVALANCHE 2500 2WD V8-8.1L VIN GREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER BLOCK ASSEMBLYPISTON RING, ENGINE
2004 Chevrolet Avalanche 2500 2WD V8-8.1L VIN G
Piston Ring, Engine
2004 Chevrolet Avalanche 2500 2WD V8-8.1L VIN GSECTION Piston Ring, Engine
Piston Ring End Gap
First Compression Ring
Production 0.300 - 0.450 mm (0.012 - 0.018 inch)
Service 0.450 - 0.675 mm (0.018 - 0.027 inch)
Second Compression Ring
Production 0.450 - 0.650 mm (0.017 - 0.025 inch)
Service 0.675 - 0.975 mm (0.026 - 0.039 inch)
Oil Control Ring
Production 0.249 - 0.759 mm (0.0098 - 0.0299 inch)
Service 0.373 - 1.138 mm (0.015 - 0.045 inch)
Piston Ring to Groove Clearance
First Compression Ring 0.031 - 0.074 mm (0.0012 - 0.0029 inch)
Second Compression Ring 0.031 - 0.074 mm (0.0012 - 0.0029 inch)
Oil Control Ring 0.051 - 0.203 mm (0.002 - 0.008 inch)
First Compression Ring
Production 0.300 - 0.450 mm (0.012 - 0.018 inch)
Service 0.450 - 0.675 mm (0.018 - 0.027 inch)
Second Compression Ring
Production 0.450 - 0.650 mm (0.017 - 0.025 inch)
Service 0.675 - 0.975 mm (0.026 - 0.039 inch)
Oil Control Ring
Production 0.249 - 0.759 mm (0.0098 - 0.0299 inch)
Service 0.373 - 1.138 mm (0.015 - 0.045 inch)
Piston Ring to Groove Clearance
First Compression Ring 0.031 - 0.074 mm (0.0012 - 0.0029 inch)
Second Compression Ring 0.031 - 0.074 mm (0.0012 - 0.0029 inch)
Oil Control Ring 0.051 - 0.203 mm (0.002 - 0.008 inch)
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.