Ford first released the 4.6-liter, dual overhead camshaft engine in 1993. Although the engine was more closely associated with Lincolns and Mercurys, the engine was also used in high-performance Mustang models. The engine featured a total of 32 valves, or four valves for each of the engine's eight cylinders. No major repair work should be performed without the correct torque specifications, as tightening a fastener too much can damage the engine.
Tighten the cylinder head bolts in six intervals. First, tighten each bolt to between 28 and 31 ft-lb of torque. Tighten each bolt an additional 85 to 95 degrees. Loosen all head bolts, then tighten each bolt to between 28 and 31 ft-lb of torque. Turn each bolt an additional 85 to 95 degrees. Finally, tighten each bolt an additional 85 to 95 degrees.
Tighten all intake bolts to between 15 and 22 ft-lb of torque.
Tighten all exhaust bolts to 15 ft-lb of torque.
Note that each main bearing cap features horizontal and vertical bolts. Like the cylinder head bolts, the main cap bolts must be tightened in six intervals. Tighten each vertical bolt to an initial setting of 89 in-lb of torque. Tighten each vertical bolt again to 18 ft-lb of torque. Tighten each vertical bolt a third time to 30 ft-lb of torque. Finally, tighten each vertical bolt an additional 90 degrees. Tighten the horizontal bolts to an initial setting of 30 ft-lb of torque. Tighten each horizontal bolts an additional 90 degrees.
Tighten each rod bearing cap nut to within a range of 29 and 34 ft-lb of torque, then tighten each nut an additional 90 to 120 degrees.
The crankshaft dampener bolt must be tightened in four intervals. First, tighten the bolt to 66 ft-lb of torque. Loosen the bolt one full turn. Tighten the bolt a second time to 37 ft-lb of torque. Finally, tighten the bolt an additional 90 degrees.
The oil pan bolts must be tightened in three intervals. Tighten the bolts to an initial setting of 18 in-lb of torque. Tighten each bolt again to 15 ft-lb of torque. Finally, tighten each bolt an additional 60 degrees.
