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How to Change the Exhaust Manifold Gasket in a F150 4 6L Engine

The Ford F150s history spans back to the 1948 Ford F-1 half-ton pickup. In 1975, the F-150 was released as a bridge between the F-100 and F-250. The F-150 replaced the F-100 as the smallest of the F-series pickups in 1984. In 1997, Ford dropped the 5.0-liter engine and replaced it with the 4.6-liter V-8, which remained until the 2010 model year. The exhaust manifold gasket is the gasket that seals the connection between the exhaust manifold and the engine. When this gasket fails, it not only creates an exhaust leak, but it can also create a poor running condition.

Instructions

1

Loosen and remove the the EGR valve tube, only on the left exhaust manifold, with a combination wrench. Trace the oil dipstick tube downward and locate the point where its bracket bolts to the engine block. Loosen the bolt securing the bracket to the block, with a ratchet and socket, and pull the tube and dipstick from the engine.

2

Remove the nuts securing the exhaust manifold to the engine, using a ratchet and socket. If the nuts are frozen, apply a coat of rust penetrating spray to free them. Pry the manifold from the engine, using a 12-inch pry bar. Secure the manifold away from the engine using a bungee strap.

3

Pull the old manifold gaskets from the 4.6-liter. Use a wire brush to clean the gasket mating surface on both the exhaust manifold and the engine.

4

Place the new gaskets on the manifold studs protruding from the engine block. Each side of the 4.6-liter has two gaskets, one front and one rear.

5

Release the exhaust manifold from the bungee strap and place it on the studs protruding from the engine block. Hand-tighten all of the nuts to secure the manifold in place.

6

Tighten the nuts, in a crossing pattern starting from the upper rear bolt, to 13 to 16 foot-pounds of torque, using a torque wrench and a socket.

7

Place the dipstick tube back into the engine and tighten the bracket bolt with a ratchet and socket.

8

Reconnect the EGR valve tube to the exhaust manifold, if applicable, and tighten it to 26 to 33 foot-pounds with a torque wrench and combination wrench.

Posted by Unknown at 7:45 AM

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