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 MANUALSCHEVROLET2008EXPRESS 2500 V8-4.8LREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER BLOCK ASSEMBLYCRANKSHAFT, ENGINE
2008 Chevrolet Express 2500 V8-4.8L
Crankshaft, Engine
2008 Chevrolet Express 2500 V8-4.8LSECTION Crankshaft, Engine
Crankshaft
Connecting Rod Journal Diameter - Production 53.318-53.338 mm (2.0991-2.0999 in)
Connecting Rod Journal Diameter - Service 53.308 mm (2.0987 in)
Connecting Rod Journal Out-of-Round - Production 0.005 mm (0.0002 in)
Connecting Rod Journal Out-of-Round - Service 0.01 mm (0.0004 in)
Connecting Rod Journal Taper - Maximum for 1/2 of Journal Length - Production 0.005 mm (0.0002 in)
Connecting Rod Journal Taper - Maximum for 1/2 of Journal Length - Service 0.02 mm (0.00078 in)
Crankshaft End Play 0.04-0.2 mm (0.0015-0.0078 in)
Crankshaft Main Journal Diameter - Production 64.992-65.008 mm (2.558-2.559 in)
Crankshaft Main Journal Diameter - Service 64.992 mm (2.558 in)
Crankshaft Main Journal Out-of-Round - Production 0.003 mm (0.000118 in)
Crankshaft Main Journal Out-of-Round - Service 0.008 mm (0.0003 in)
Crankshaft Main Journal Taper - Production 0.01 mm (0.0004 in)
Crankshaft Main Journal Taper - Service 0.02 mm (0.00078 in)
Crankshaft Rear Flange Runout 0.05 mm (0.002 in)
Crankshaft Reluctor Ring Runout - Measured 1.0 mm (0.04 in) Below Tooth Diameter 0.7 mm (0.028 in)
Crankshaft Thrust Surface - Production 26.14-26.22 mm (1.029-1.0315 in)
Crankshaft Thrust Surface - Service 26.22 mm (1.0315 in)
Crankshaft Thrust Surface Runout 0.025 mm (0.001 in)
Connecting Rod Journal Diameter - Production 53.318-53.338 mm (2.0991-2.0999 in)
Connecting Rod Journal Diameter - Service 53.308 mm (2.0987 in)
Connecting Rod Journal Out-of-Round - Production 0.005 mm (0.0002 in)
Connecting Rod Journal Out-of-Round - Service 0.01 mm (0.0004 in)
Connecting Rod Journal Taper - Maximum for 1/2 of Journal Length - Production 0.005 mm (0.0002 in)
Connecting Rod Journal Taper - Maximum for 1/2 of Journal Length - Service 0.02 mm (0.00078 in)
Crankshaft End Play 0.04-0.2 mm (0.0015-0.0078 in)
Crankshaft Main Journal Diameter - Production 64.992-65.008 mm (2.558-2.559 in)
Crankshaft Main Journal Diameter - Service 64.992 mm (2.558 in)
Crankshaft Main Journal Out-of-Round - Production 0.003 mm (0.000118 in)
Crankshaft Main Journal Out-of-Round - Service 0.008 mm (0.0003 in)
Crankshaft Main Journal Taper - Production 0.01 mm (0.0004 in)
Crankshaft Main Journal Taper - Service 0.02 mm (0.00078 in)
Crankshaft Rear Flange Runout 0.05 mm (0.002 in)
Crankshaft Reluctor Ring Runout - Measured 1.0 mm (0.04 in) Below Tooth Diameter 0.7 mm (0.028 in)
Crankshaft Thrust Surface - Production 26.14-26.22 mm (1.029-1.0315 in)
Crankshaft Thrust Surface - Service 26.22 mm (1.0315 in)
Crankshaft Thrust Surface Runout 0.025 mm (0.001 in)
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.