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 MANUALSCHEVROLET2004EXPRESS 2500 2WD V8-6.0L VIN UREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER BLOCK ASSEMBLYPISTON, ENGINE
2004 Chevrolet Express 2500 2WD V8-6.0L VIN U
Piston, Engine
2004 Chevrolet Express 2500 2WD V8-6.0L VIN USECTION Piston, Engine
GENERAL SPECIFICATIONS
Pistons and Pins
Piston - Piston Diameter - Measured Over Skirt Coating 101.606 - 101.640 mm (4.0002 - 4.0016 inch)
Piston - Piston to Bore Clearance - Production 0.022 - 0.03 mm - interference (0.0009 - 0.0012 inch - interference)
Piston - Piston to Bore Clearance - Service Limit with Skirt Coating Worn Off 0.07 mm (0.0028 inch)
Pin - First Design Press Fit Pin Fit in Connecting Rod Bore 0.02 - 0.043 mm - Interference (0.00078 - 0.00169 inch - Interference)
Pin - First Design Press Fit Pin Clearance to Piston Pin Bore - Production 0.01 - 0.02 mm (0.0004 - 0.00078 inch)
Pin - First Design Press Fit Pin Clearance to Piston Pin Bore - Service 0.01 - 0.022 mm (0.0004 - 0.00086 inch)
Pin - First Design Press Fit Pin Diameter 23.997 - 24.0 mm (0.9447 - 0.9448 inch)
Pin - Second Design Full Floating Pin Fit in Connecting Rod Bore - Production 0.007 - 0.02 mm (0.00027 - 0.00078 inch)
Pin - Second Design Full Floating Pin Fit in Connecting Rod Bore - Service 0.007 - 0.022 mm (0.00027 - 0.00086 inch)
Pin - Second Design Full Floating Pin Clearance to Piston Pin Bore - Production 0.002 - 0.01 mm (0.00008 - 0.0004 inch)
Pin - Second Design Full Floating Pin Clearance to Piston Pin Bore - Service 0.002 - 0.015 mm (0.00008 - 0.0006 inch)
Pin - Second Design Full Floating Pin Diameter 23.952 - 23.955 mm (0.943 - 0.943 inch)
Pistons and Pins
Piston - Piston Diameter - Measured Over Skirt Coating 101.606 - 101.640 mm (4.0002 - 4.0016 inch)
Piston - Piston to Bore Clearance - Production 0.022 - 0.03 mm - interference (0.0009 - 0.0012 inch - interference)
Piston - Piston to Bore Clearance - Service Limit with Skirt Coating Worn Off 0.07 mm (0.0028 inch)
Pin - First Design Press Fit Pin Fit in Connecting Rod Bore 0.02 - 0.043 mm - Interference (0.00078 - 0.00169 inch - Interference)
Pin - First Design Press Fit Pin Clearance to Piston Pin Bore - Production 0.01 - 0.02 mm (0.0004 - 0.00078 inch)
Pin - First Design Press Fit Pin Clearance to Piston Pin Bore - Service 0.01 - 0.022 mm (0.0004 - 0.00086 inch)
Pin - First Design Press Fit Pin Diameter 23.997 - 24.0 mm (0.9447 - 0.9448 inch)
Pin - Second Design Full Floating Pin Fit in Connecting Rod Bore - Production 0.007 - 0.02 mm (0.00027 - 0.00078 inch)
Pin - Second Design Full Floating Pin Fit in Connecting Rod Bore - Service 0.007 - 0.022 mm (0.00027 - 0.00086 inch)
Pin - Second Design Full Floating Pin Clearance to Piston Pin Bore - Production 0.002 - 0.01 mm (0.00008 - 0.0004 inch)
Pin - Second Design Full Floating Pin Clearance to Piston Pin Bore - Service 0.002 - 0.015 mm (0.00008 - 0.0006 inch)
Pin - Second Design Full Floating Pin Diameter 23.952 - 23.955 mm (0.943 - 0.943 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.