Budget 390 FE Engine Build Torquing Main Caps

Main stud nuts are torqued in third values--ultimately to 85 ft-lb. Begin at the number 3 cap at 28 ft-lb, then number 2, then number 4, then number 1, and finally number 5. Come back with 56 ft-lb in the same order, and then finally to the 85 ft-lb. Be smooth in your application of torque--no jerking the torque wrench. Be sure to check the crank for freedom of movement (turning) with each cap. If you encounter resistance, clearances must be checked. It means you have improper bearing crush and tight clearances. Peart checks crankshaft endplay using a dial indicator. Endplay should be 0.004-0.0010 inch. Ours is 0.006 inch.

Budget FE Power! - Part 1 in a Two-Part Series

Main stud nuts are torqued in third values--ultimately to 85 ft-lb. Begin at the number 3 cap at 28 ft-lb, then number 2, then number 4, then number 1, and finally number 5. Come back with 56 ft-lb in the same order, and then finally to the 85 ft-lb. Be smooth in your application of torque--no jerking the torque wrench. Be sure to check the crank for freedom of movement (turning) with each cap. If you encounter resistance, clearances must be checked. It means you have improper bearing crush and tight clearances. Peart checks crankshaft endplay using a dial indicator. Endplay should be 0.004-0.0010 inch. Ours is 0.006 inch. View Related Article