Harley Davidson Exhaust Flange Nut Torque

Install upper nuts finger tight.

Harley davidson exhaust flange nut torque. Remove the two head pipe mounting nuts from each flange located at the cylinder head. Original hardware torque to 15-18 ftlbs. Fastener Size - Torque ft.

Tighten upper nuts to 60-80 in. Tighten top nut to 9 - 18 in-lbs tighten bottom nut to 100 - 120 in-lbs Re-tighten top nut to 100 - 120 in-lbs Repeat on the rear exhaust. Got 4 new nuts and totally reinstalled exhaust.

Made from aluminum thread that is woven into a mesh the gaskets deform upon compression by the exhaust pipe and flange. Remove the two bolts from each muffler body where they attach to the mounting bar. Im going to fit a Muscle.

Round in shape but triangular in cross-section the outer peak of the triangle receives the pipe end and seals against it as the gasket is crushed. Assuming your using new gaskets you might want to repeat a second time. Repeat these steps for the rear cylinder head exhaust flange.

Insert the small end of a torque cone into each of the two exhaust pipe openings until the flange on the cones comes against the flange on the exhaust pipes. Well when the bike cooled I inspected and saw one nut had vibrated loose and fallen off the rear pipe flange causing the problem. Tighten the bottom nut of the same flange to 100 to 120 inch-pounds.

Tighten the exhaust into place. 21Check alignment of both pipes. Def think it needs a couple iterations of torque.