Clean each lifter with a standard parts cleaning solvent. Dry the lifter with low pressure compressed air after cleaning.
Check the lifter body for scoring and wear. Then turn the lifter over and check condition of the roller (Figure 2-47). Replace the lifter if the body is worn or scored, or the roller is scuffed, chipped, loose, or the roller bearings are worn.
Press the lifter plunger down with a push rod and note if the plunger is collapsed. Replace collapsed lifters; they are not salvageable.