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 MANUALSCHEVROLET2002EXPRESS 1/2 TON VAN V8-5.7L VIN RREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER BLOCK ASSEMBLYPISTON RING, ENGINE
2002 Chevrolet Express 1/2 Ton Van V8-5.7L VIN R
Piston Ring, Engine
2002 Chevrolet Express 1/2 Ton Van V8-5.7L VIN RSECTION Piston Ring, Engine
Piston
Piston Bore Clearance - Production 0.018-0.053 mm (0.0007-0.002 inch)
Piston Bore Clearance - Service 0.018-0.061 mm (0.0007-0.0024 inch)
Piston Rings - End Gap Measured inch Cylinder Bore
Piston Compression Ring Gap - Production - Top Groove 0.25-0.40 mm (0.098-0.015 inch)
Piston Compression Ring Gap - Production - 2nd Groove 0.038-0.058 mm (0.0015-0.003 inch)
Piston Compression Ring Gap - Service - Top Groove 0.25-0.50 mm (0.009-0.019 inch)
Piston Compression Ring Gap - Service - 2nd Groove 0.46-0.80 mm (0.018-0.031 inch)
Piston Compression Ring Groove Clearance - Production - Top 0.030-0.070 mm (0.0012-0.0027 inch)
Piston Compression Ring Groove Clearance - Production 0.038-0.080 mm (0.0015-0.003 inch)
Piston Compression Ring Groove Clearance - Service Limit - Top 0.030-0.090 mm (0.0012-0.0035 inch)
Piston Compression Ring Groove Clearance - Service Limit - 0.040-0.100 mm (0.0015-0.0040 inch)
Piston Oil Ring Gap - Production 0.25-0.76 mm (0.009-0.029 inch)
Piston Oil Ring Gap - Service 0.25-0.90 mm (0.009-0.035 inch)
Piston Oil Ring Groove Clearance - Production 0.046-0.196 mm (0.0018-0.0077 inch)
Piston Oil Ring Groove Clearance - Service 0.046-0.200 mm (0.0018-0.0079 inch)
Piston Bore Clearance - Production 0.018-0.053 mm (0.0007-0.002 inch)
Piston Bore Clearance - Service 0.018-0.061 mm (0.0007-0.0024 inch)
Piston Rings - End Gap Measured inch Cylinder Bore
Piston Compression Ring Gap - Production - Top Groove 0.25-0.40 mm (0.098-0.015 inch)
Piston Compression Ring Gap - Production - 2nd Groove 0.038-0.058 mm (0.0015-0.003 inch)
Piston Compression Ring Gap - Service - Top Groove 0.25-0.50 mm (0.009-0.019 inch)
Piston Compression Ring Gap - Service - 2nd Groove 0.46-0.80 mm (0.018-0.031 inch)
Piston Compression Ring Groove Clearance - Production - Top 0.030-0.070 mm (0.0012-0.0027 inch)
Piston Compression Ring Groove Clearance - Production 0.038-0.080 mm (0.0015-0.003 inch)
Piston Compression Ring Groove Clearance - Service Limit - Top 0.030-0.090 mm (0.0012-0.0035 inch)
Piston Compression Ring Groove Clearance - Service Limit - 0.040-0.100 mm (0.0015-0.0040 inch)
Piston Oil Ring Gap - Production 0.25-0.76 mm (0.009-0.029 inch)
Piston Oil Ring Gap - Service 0.25-0.90 mm (0.009-0.035 inch)
Piston Oil Ring Groove Clearance - Production 0.046-0.196 mm (0.0018-0.0077 inch)
Piston Oil Ring Groove Clearance - Service 0.046-0.200 mm (0.0018-0.0079 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.