Main Bearing Noise
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| 1 | Are dull thuds or knocks heard with every engine revolution? | - | Go to Step 2 | System OK |
| 2 | Measure the oil pump pressure. Is the oil pump pressure low? |
- | Go to Oil Pressure Diagnosis and Testing | Go to Step 3 |
| 3 | Inspect the crankshaft end play. Is the crankshaft end play greater than the given value? |
0.28 mm (0.011 in) | Go to Crankshaft Replacement | Go to Step 4 |
| 4 | Inspect the crankshaft journals. Are the crankshaft journals out-of-round? |
- | Go to Crankshaft Replacement | Go to Step 5 |
| 5 | Inspect the belt tension. Is there excessive belt tension? |
- | Go to Crankshaft Replacement | Go to Step 6 |
| 6 | Inspect the crankshaft pulley. Is the crankshaft pulley loose? |
- | Go to Crankshaft Replacement | System OK |