subject: Auto Repair Manual Illustrations [print this page] A word of precaution when tightening screws, bolts and nuts against a plastic, aluminum or rubber parts: Auto repair manuals/bentley repair manuals do not give torque specifications for tightening these. Tightening should be sufficient only for the part not to turn loose. The metal screws, nuts or bolts should not dig' or embed into those soft materials. Over tightening could cause the materials to break, warp or tear away. If applicable, use a lock washer to ensure bolts and nuts will not come loose.
