Engine Noise Under Load (1)

Engine Mechanical - 5.3L L84 or 6.2L L87 | Diagnostic Information and Procedures | Document ID: 5617545 Engine Noise Under Load Engine Noise Under Load

Cause	Correction
Low oil pressure	1. Perform an oil pressure test. Oil Pressure Diagnosis and Testing 2. Repair or replace, as required.
Detonation or spark knock	Verify the correct operation of the ignition controls. Symptoms - Engine Mechanical
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, as required: The connecting rod bearings The connecting rods The crankshaft
Excessive crankshaft bearing clearance	Inspect the following components and repair, as required: The crankshaft bearings The crankshaft journals The cylinder block crankshaft bearing bore Engine Mechanical Specifications