CLEANING, INSPECTION, AND REPAIR CONTINUED
6. Clean all crankshaft internal oil passages (Figure 7, Item 2) of any dirt or sludge that may have accumulated.
With six plugs (Figure 7, Item 4) removed from crankshaft (Figure 7, Item 5), run a stiff wire brush (seven in. or
longer) through oil passages to loosen deposits. Then wash passages and external surfaces of crankshaft
(Figure 7, Item 3) thoroughly with solvent. Blow passages and external surfaces dry with compressed air. A
visual inspection of drilled holes in main (Figure 7, Item 1) and connecting rod journals must be made to assure
all passages are open. Install plugs securely in crankshaft.
Figure 7. Cleaning Crankshaft Oil Passages.