For 1990-2009 cars only
| • | A/C compressor or generator bearing. Replace as necessary. |
| • | Valve train. Replace parts as necessary. |
| • | Improper oil viscosity. Replace with the proper oil for expected temperature. |
| • | Connecting rod alignment. Replace the connecting rods as necessary. |
| • | Excessive piston pin clearance. |
| • | Loose crankshaft balancer. Torque and/or replace. |
| • | Piston pin offset to wrong side. Install correct piston. |
| • | Dirt of foreign material lodged in the balance shaft gear or the camshaft gear. |
