Section 7 - Lubricating Oil System - Group 07 Lubricating Oil Pump - Rebuild (7-09) M11 Page 7-19 Lubricating Oil Pump - Rebuild (7-09) Caution: The lubricating oil pump body cannot be drilled and reamed due to the highly precise and sophisticated drilling and reaming required. Attempting to rebuild the oil pump can cause oil pump failure and future engine damage.