Lincoln F4AZ-9430-B Exhaust Manifold Assembly

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Disconnect the cable from the negative battery terminal. Raise the vehicle and support it securely on jackstands. Working under the vehicle, apply penetrating oil to the exhaust pipe-to-manifold studs and nuts as they're usually corroded or rusty. Remove the nuts holding the exhaust pipe(s) to the manifold(s). On the right side exhaust manifold, disconnect the EGR pipe and remove the two manifold-to-exhaust pipe nuts. On the left side, only the two exhaust manifold-to-exhaust pipe nuts need to be removed. In extreme cases, you may have to heat them with a propane or acetylene torch in order to loosen them. Disconnect the EGR tube connector from the right side manifold. Remove the through bolts for the engine mounts. Slowly raise the engine with a floor jack, using a piece of wood between the jack and the oil pan, until the fan just touches the fan shroud. Be careful that nothing is being pulled or stretched too tightly. Remove the left side engine mount from the block, if necessary, to get to all the manifold bolts. It isn't necessary to remove the right side engine mount. Remove the exhaust manifold(s)-to-cylinder head bolts and separate the manifold(s) from the cylinder head(s). Check the manifold for cracks and make sure the bolt threads are clean and undamaged. The manifold and cylinder head mating surfaces must be clean before the manifolds are reinstalled. Position the manifold on the head and install the mounting bolts. When tightening the mounting bolts, work from the center to the ends and be sure to use a torque wrench. Tighten the bolts in three equal steps to the torque. The remaining installation steps are the reverse of removal. Start the engine and check for exhaust leaks.

Start the engine and check for exhaust leaks.