For 1990-2009 cars

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
1 | Are dull thuds or knocks heard with every engine revolution? | -- | Go to Step 2 | System OK
2 | Inspect 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. Does the crankshaft end play exceed the specified value? | 0.1 mm (0.003 in) | Go to Crankshaft Replacement | Go to Step 4
4 | Inspect the crankshaft journals. Are the crankshaft journals out-of-round? | 0.004 mm (0.0002 in) max | Go to Crankshaft Replacement | Go to Step 5
5 | Inspect the belt tension. Is a repair necessary? | -- | Go to Timing Belt Replacement | Go to Step 6
6 | Inspect the crankshaft pulley Is the crankshaft pulley loose? | -- | Go to Crankshaft Replacement | System OK