Cause
| Correction
|
Low oil pressure
|
- Perform an oil pressure test. Refer to Oil Pressure Diagnosis and Testing .
- Repair or replace damaged components 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 balancer
|
- Inspect the crankshaft balancer.
- Repair or replace as required.
|
Detonation or spark knock
| Verify the correct operation of the ignition controls system. Refer Symptoms - Engine Controls .
|
Loose torque converter bolts
|
- Inspect the torque converter bolts and engine flywheel.
- Repair or replace as required.
|
Loose or damaged engine flywheel
| Repair or replace the engine flywheel.
|
| • | Damaged sump, contacting the oil pump screen |
| • | An oil sump that has been damaged may improperly position the oil pump screen, preventing proper oil flow to the oil pump. |
|
- Inspect the sump.
- Inspect the oil pump screen.
- Repair or replace as required.
|
Oil pump screen loose, damaged or restricted
|
- Inspect the oil pump screen.
- Repair or replace as required.
|
Excessive piston-to-cylinder bore clearance
|
- Inspect the piston and cylinder bore.
- Repair as required.
|
Excessive gudgeon pin-to-bore clearance
|
- Inspect the piston, gudgeon pin, and the connecting rod.
- Repair or replace as required.
|
Excessive big end bearing clearance
| Inspect the following components, and repair as required:
| • | The crankshaft journals |
|
Excessive crankshaft bearing clearance
| Inspect the following components, and repair as required:
| • | The crankshaft bearings |
| • | The crankshaft journals |
|
| • | 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. Gudgeon pins must be centred in the connecting rod pin bore. |
|
- Verify the pistons, gudgeon pins and connecting rods are installed correctly.
- Repair as required.
|
