SPECIFICATIONS 47 Engine Component Torque Specifications (Critical Fasteners) Note: All components are to be clean and free from foreign material or corrosion. Assemblies are to be made using suitable tools and procedures so that no permanent damage will occur as a result of the assembly. Threads, washers, under head of screws and washer face of nuts should be lubricated with clean engine oil unless otherwise specified. The following listed fasteners require the use of a calibrated manual torque wrench. If an adapter is required in combination with a torque wrench, a correction factor must be applied to the torque wrench reading in order to obtain accurate fastener torque values.
Fasteners noted by an asterisk (*) require retorque after engine run-in. Fastener Reuse CAUTION Repeated tightening of fasteners and threaded components reduces their capacity to function adequately. The following table describes the various items and the limits of their reusability. Failue to conform to these limits may result in severe component damage. Fastener Reuse Fssteners Example Reusable Limit Reusable Recommendation Highly loaded screws (Phosphating plus oil) Cylinder Head Injector yoke Camshaft Bearing Housing Transmissio Flywheel 5 times n Apply engine oil on threads and under screw heads. Mark bolt head with an indentation.
Dry mounting for new screws (delivered with oil pre-applied and anti-rust treatment for spare parts). If a part is replaced, e.g., cylinder head, also replace the screws. Highly loaded screws (Phosphating plus oil) Connect- ing rods for D13F engines 5 times Apply Molykote grease “G-Rapid+MoS2” (spray). Special screws (specific shape) Oil pan and valve cover No limit No limit if no cracks, corrosion or damage to the flat surface.