Section 7 - Lubricating Oil System - Group 07 Lubricating Oil Filter Head - Rebuild (7-06) M11 Page 7-9 Inspection Visually inspect the filter head for cracks or other dam- age. If cracks or damage is found, the filter head must be replaced. Lubricating Oil Filter Head - Rebuild (7-06) Disassembly Using snap ring pliers, remove the snap ring in the ther- mostat bore. Remove the oil thermostat. Caution: To avoid personal injury, use care while remov- ing the bypass valve. The valve spring is under com- pression. Wear face and eye protection. Remove the snap ring from the bypass valve bore. Remove the washer, spring and bypass valve.
Remove the remaining plugs and fittings from the filter head. NOTE: Do not allow dirt or gasket material to enter the oil passages when cleaning the oil filter head. Use solvent to clean the filter head and associated parts.