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Feuling, Anti rotation pins hydraulic tappet assembly +.002"
+0.002" oversized diameter. 2 used. OEM replacement reference 18535-99Excessive engine noise can be produced when there is excess clearance between the lifters and the anti-rotation pins. The excessive clearance allows the lifters to rock back and forth; which not only produces physical noise from the lifter rocking side to side; it can also lead to premature roller failure and even pin failure. Create a balanced and quiet engine with proper lifter anti-rotation pin clearance. Feuling recommends a max clearance of 0.002"-0.003".