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 MANUALSCHEVROLET1993LUMINA APV V6-3800 3.8LREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER BLOCK ASSEMBLYCRANKSHAFT, ENGINE
1993 Chevrolet Lumina APV V6-3800 3.8L
Crankshaft, Engine
1993 Chevrolet Lumina APV V6-3800 3.8LSECTION Crankshaft, Engine
Crankshaft - Main Bearings Journal
Diameter All 63.470 - 63.495 mm (2.4988-2.4998 in.)
Taper Max 0.0008 mm (0.0003 in.)
Runout Max 0.0008 mm (0.0003 in.)
Bearing to Journal Clearance 0.020 mm - 0.055 mm (0.0008-0.0022 in.)
Main Bearing Bore ID 68.250 - 68.275 mm (2.687 - 2.688 in.)
Crankshaft End Play 0.076 - 0.279 mm (0.003-0.011 in.)
Connecting Rod Bearings
Diameter 57.117 - 57.147 mm (2.2487-2.2499 in.)
Taper Max 0.0008 mm (0.0003 in.)
Runout Max 0.0008 mm (0.0003 in.)
Bearing to Journal Clearance 0.02mm - 0.055 mm (0.00080.0022 in.)
Rod Side Clearance 0.076 - 0.381 mm (0.003 - 0.015 in.)
Connecting Rod Large End Bore ID 60.295 - 60.312 mm (2.3738-2.3745 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.