Section 7 - Lubricating Oil System - Group 07 Lubricating Oil Filter Head - Rebuild (7-06) M11 Page 7-11 Use valve spring tester, Part No. 3375182, to inspect the operating condition of the bypass valve spring. Spring Specifications (Free Length) mm in 37.68 MIN 1.483 38.52 MAX 1.517 Spring Specifications at 29.65 mm [1.167 in] Load N lbf 110.1 MIN 24.751 121.7 MAX 27.359 If damaged parts are found, or the bypass spring is not within the specifications given, the parts must be replaced. Assembly Install the bypass valve into the filter head. The notched end of the valve (1) must face the engine side of the filter head. Insert the spring into the bore.
Check to be sure the spring is properly located over the notched end of the valve (1). Caution: The valve spring must be compressed to install the snap ring. To avoid personal injury, wear face and eye protection. Place the washer on top of the spring. Using snap ring pliers, install the snap ring into the groove inside the bore. Insert the thermostat into the filter head as shown.