Step  | Action  | Values  | Yes  | No  | 
|---|---|---|---|---|
1  | Are dull thuds or knocks heard with every engine revolution?  | --  | Go to Step 2  | System OK  | 
2  | Check the oil pump pressure. Is the oil pump pressure low?  | --  | Go to Step 3  | |
3  | Inspect the crankshaft end play. Does the crankshaft end play exceed the specified value?  | 0.1 mm (0.0039 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. Does the belt tension exceed the specified value?  | --  | 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  |