1999 Volvo Penta "WT" Models Workshop Manual, Page 297Get this manual
Torque Specifications
Use reliable torque wrench to tighten the parts listed to prevent straining or distorting the parts or possibly damaging the threadsThese specifications are for clean threads onlyDirty threads produce friction which prevents accurate measurement of tightnessIt is important that these torque specifications be strictly observedOvertightening to any extent may damage threads, thus preventing proper torque from being obtained, requiring replacement or repair of the damaged part
Camshaft Sprocket