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ENGINE NOISE UNDER LOAD The connecting rod bearings The connecting rods The crankshaft The crankshaft journals Excessive crankshaft bearing clearance Inspect the following components and repair, The crankshaft bearings The crankshaft journals Incorrect piston, piston pin, and connecting 1. Verify the pistons, piston pins and connecting rods are installed correctly. 2. Repair, as required. Cause Correction Low oil pressure 1. Perform an oil pressure test. Refer to Oil Pressure Diagnosis and Testing. 2. Repair or replace, as required. Detonation or spark knock Verify the correct operation of the ignition Loose torque converter bolts 1. Inspect the torque converter bolts and flex plate. 2. Repair, as required. Cracked flex plate - automatic transmission 1. Inspect the flex plate bolts and flex plate. 2. Repair, as required. Excessive connecting rod bearing clearance Inspect the following components and repair, The connecting rod bearings The connecting rods
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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