Reluctor Ring Replacement for C 2500 Truck 2WD V8-57L VIN R (1997)
Crankshaft: Service and Repair
Replacement, Engine Overhaul
Removal
1. Remove the crankshaft bearing cap bolts and studs.
2. Remove the crankshaft bearing caps.
3. Remove the crankshaft.
4. Remove the crankshaft bearings from the bearing caps and from the engine block.
Installation
NOTE:
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Crankshaft bearings are the precision insert type and do not use shims for adjustment) Excessive clearances require a new bearing. Service
bearings are available in standard size. Service bearings are also available in the following undersizes:
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0.0254 mm (0.001 inch)
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0.0508 mm (0.002 inch)
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0.2540 mm (0.010 inch)
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0.5080 mm (0.020 inch)
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0.2286 mm (0.009 inch)
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Selective fitting of both connecting rod and crankshaft bearings is necessary in order to obtain close tolerances. For this reason, you may use one
half of a 0.0254 mm (0.001 inch) undersize bearing which will decrease the clearance 0.0127 mm (0.0005 inch) from using a full standard bearing.
Undersize Crankshaft Journals
1. When a production crankshaft cannot be precision fit by the method described below, the crankshaft is then ground 0.2286 mm (0.009 inch)
underside.
2. Grind only those crankshaft journals that cannot be properly fitted. All journals will not necessarily be ground.
3. A 0.2286 mm (0.009 inch) undersize bearing or 0.2540 mm (0.010 inch) undersize bearing will then be used for precision fitting in the same
manner as previously described.
