Posted on November 23, 2020 C7 Industrial Engines Specifications – Refrigerant Compressor Use the following procedure to install the refrigerant compressor: Install all bolts hand tight. Tighten the top bolt (1).Tighten the bolt to the following torque. … 55 ± 10 N·m (40 ± 7 lb ft) Tighten the two lower bolts (4).Tighten the bolts to the following torque. … 55 ± 10 N·m (40 ± 7 lb ft) Tighten the remaining two bolts (2) and (3).Tighten the bolts to the following torque. … 55 ± 10 N·m (40 ± 7 lb ft)