Place the back of the clutch field coil over the dowel pin and then, with the rear facing the compressor, line up the hole in the front of the clutch with the hole on the A/C compressor. A new snap ring needs to hold the compressor clutch field coil in place, with the bevel pointing out and the eyelets next to the correct side of the dowel pin. Using similar pliers, slide in the ring that holds the field coil, making certain it is properly in place. Don't engage the friction surfaces during pulley and bearing assembly installation and make sure the snap ring with bevel side outward helps secure it. In the case of using original pump parts, add back the original shims to the compressor shaft; for new parts, add trial shims measuring 2.54 mm each. Insert the clutch plate onto the A/C compressor and use the compressor shaft bolt to fix it in place. Make the bolt connection tight at 19 Nm. After you tighten each wheel, check the air gap at different places; if it isn't between 0.35 - 0.60mm, replace the shims as required. Lift the compressor clutch field coil wire lead behind the connector bracket, fit the connector into place and connect the engine wire harness. Install the drive belt on the accessories, then add the radiator fan and shroud assembly, air cleaner housing and air intake hose for 5.7L and 6.1L engine cars. Afterward, connect the negative battery cable again.