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Fig. 511: Crankshaft Bearing Caps 5. Install the crankshaft bearing caps in the original positions and with the arrow on the crankshaft bearing caps in the direction of the front of the engine block. 6. Install the crankshaft bearing cap bolts. Tighten: Tighten the crankshaft bearing caps to 105 N.m (77 lb ft).
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
7. Remove the crankshaft bearing cap bolts. 8. Remove the crankshaft bearing caps. The gaging plastic may adhere to either the crankshaft bearing journal or the crankshaft bearing surface. Fig. 512: Measuring Gaging Plastic 9. Without removing the gaging plastic, measure the compressed width at the widest point using the graduated scale on the edge of the gaging plastic envelope. If the flattened gaging plastic tapers toward the middle or the ends, there may be a
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
bearing or the crankshaft bearing journal. 10. Remove the flattened gaging plastic. 11. Measure the remaining crankshaft bearing journals. Measuring Connecting Rod Bearing Side Clearance Fig. 513: Measuring Connecting Side Clearance 1. Insert a feeler gage between the connecting rod caps and measure the connecting rod side clearance. The proper connecting rod side clearance specification is 0.15-0.44 mm (0.006- 2. Connecting rod side clearances may also be measured with a dial indicator set. CRANKSHAFT BALANCER CLEANING AND INSPECTION
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Fig. 514: Crankshaft Balancer Cleaning & Inspection Areas 1. Clean the crankshaft balancer in cleaning solvent. 2. Dry the crankshaft balancer with compressed air. 3. Inspect the crankshaft balancer for the following: Loose or improperly installed crankshaft balancer front groove pin (1) CAUTION: Refer to SAFETY GLASSES CAUTION .
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
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