| • | Broken balancer or pulley hub; Replace the parts as necessary. | 
| • | Loose torque converter bolts; Tighten the bolts. | 
| • | The accessory drive belt is too tight or nicked. Replace the drive belt as necessary. | 
| • | The exhaust system is grounded. Reposition the exhaust system components as necessary. | 
| • | The flywheel is cracked. Replace the flywheel as necessary. | 
| • | There is excessive main bearing clearance. Replace the main bearing(s) as necessary. | 
| • | There is excessive rod bearing clearance. Replace the rod bearing(s) as necessary. |