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1. Firmly thrust the crankshaft first rearward, then forward. This will align the crankshaft rear bearings and the crankshaft thrust surfaces. 2. With the crankshaft pushed forward, insert a feeler gage between the crankshaft and the crankshaft bearing surface and then measure the clearance. The proper crankshaft 3. Turn the crankshaft to check for binding. If the crankshaft does not turn freely, then loosen the crankshaft bearing cap bolts, one crankshaft bearing cap at a time, until the Burrs on the crankshaft bearing cap or engine block, foreign matter between the IMPORTANT: In order to properly measure the crankshaft end play, the crankshaft, the crankshaft bearings, the crankshaft
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Fig. 483: Identifying Crankshaft Bearing Craters Or Pockets 11. Inspect the crankshaft bearings for craters or pockets. Flattened sections on the crankshaft bearing halves also indicate fatigue.
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Fig. 484: Identifying Connecting Rod Bearing Scoring Or Discoloration 12. Inspect the crankshaft bearings for excessive scoring or discoloration. 13. Inspect the crankshaft bearings for dirt or debris imbedded into the crankshaft bearing material.
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Fig. 485: Crankshaft Bearing Polished Sections (Improper Seating) 14. Inspect the crankshaft bearings for improper seating indicated by bright, polished sections of the crankshaft bearings. If the lower half of the crankshaft bearing is worn or damaged, both the upper and Generally, if the lower half of the crankshaft bearing is suitable for use, the upper half Measuring Crankshaft Bearing Clearances
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
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