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Lower Engine Noise, Regardless of Engine Speed Cause Correction Low oil pressure Perform an oil pressure test. Refer to Repair or replace damaged components Worn accessory drive components Inspect the accessory drive system. Repair or replace as required. Loose or damaged crankshaft balancer Inspect the crankshaft balancer. Repair or replace as required. Detonation or spark knock Verify the correct operation of the ignition Loose torque converter bolts Inspect the torque converter bolts and Repair or replace as required. Loose or damaged flywheel Repair or replace the flywheel. Oil pump screen loose, damaged or restricted Inspect the oil pump screen. Repair or replace as required. Oil transfer tube loose, damaged or restricted Inspect the transfer tube. Repair or replace as required. Excessive piston-to-cylinder bore clearance Inspect the piston and cylinder bore. Repair as required. Excessive piston pin-to-bore clearance Inspect the piston, piston pin and the Repair or replace as required. Excessive connecting rod bearing clearance Inspect the following components and repair The connecting rod bearings The connecting rods The crankshaft
2007 Hummer H3 2007 ENGINE Engine Mechanical - 3.7L - H3
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