Cause
| Correction
|
Low oil pressure
|
| • | Repair or replace damaged components as required. |
|
Loose and/or worn valve rocker arm attachments
|
| • | Inspect the valve rocker arm on the rocker arm shaft for looseness or excessive wear. |
| • | Repair or replace worn or damaged components as required. |
|
Worn or damaged valve rocker arm
|
| • | Inspect the rocker arm for wear on the rocker arm adjusting screw tips or the cam riding surface. |
| • | Replace the valve rocker arms as required. |
|
Worn accessory drive components
(Abnormalities such as severe cracking, bumps or missing areas in the accessory drive belt and/or misalignment of system components.)
|
| • | Inspect the accessory drive system. |
| • | Repair or replace as required. |
|
Loose or damaged crankshaft pulley
|
| • | Inspect the crankshaft pulley. |
|
Detonation or spark knock
| Verify the correct operation of the ignition controls system. Refer to Engine Controls.
|
Loose torque converter bolts
|
| • | Inspect the torque converter bolts and flywheel. |
|
Loose or damaged flywheel
| Repair or replace the flywheel. Refer to
Engine Flywheel Removal
.
|
Oil pump screen loose, damaged or restricted
|
| • | Inspect the oil pump screen. |
|
Excessive piston-to-cylinder bore clearance
|
| • | Inspect the piston and cylinder bore. |
|
Excessive piston pin-to-bore clearance
|
| • | Inspect the piston, piston pin, and the connecting rod. |
| • | Repair or replace as required. |
|
Excessive connecting rod bearing clearance
| Inspect the following components, and repair as required:
|
Excessive crankshaft bearing clearance
| Inspect the following components, and repair as required:
|
Incorrect piston, piston pin and connecting rod installation
(Pistons must be installed with the mark or dimple on the top of the piston facing the front of the engine. Piston pins must be centered in the connecting rod pin bore.)
|
| • | Verify the pistons, piston pins and connecting rods are installed correctly. |
|
