The engine must be completely cool before beginning this procedure. REMOVAL: Disconnect the cable from the negative terminal of the battery. Raise the front of the vehicle and support it on jackstands. Spray penetrating oil on the exhaust manifold fasteners and allow it to soak in. Working under the vehicle, disconnect the front exhaust pipes from the vehicle. On California models, detach the heat shields from the pre-catalytic converter, disconnect the oxygen sensor connectors and remove the pre-cat from the exhaust manifold. If both exhaust manifolds are being removed, both pre-catalytic converters or front exhaust pipes must be removed. On 2WD models, remove the front suspension crossmember first, to facilitate removal of the front exhaust pipes. For the left manifold, remove the air intake duct and the top half of air cleaner housing as an assembly from the throttle body. Disconnect the EGR flare tube from the exhaust manifold. Remove the bracket holding the engine oil dipstick. Remove the heat shield from the manifold to provide access to the manifold fasteners, and remove the upper row of manifold nuts. Work from the ends toward the middle when removing the manifold fasteners. Working from below, remove the lower row of manifold fasteners and remove the manifold from the engine. For the right manifold, working from above, remove the manifold heat shield. Remove the upper row of manifold nuts. Work from the ends toward the middle when removing the manifold fasteners. Working from below, remove the lower row of manifold fasteners and remove the manifold from the engine. INSTALLATION: Carefully inspect the manifolds and fasteners for cracks and damage. Use a scraper to remove all traces of old gasket material and carbon deposits from the manifold and cylinder head mating surfaces. If the gasket was leaking, have the manifold checked for warpage at an automotive machine shop and resurfaced if necessary. Position new gaskets over the cylinder head studs. Install the manifold and thread the mounting nuts into place. Working from the center out, tighten the nuts to the specific torque in three or four equal steps. Reinstall the remaining parts in the reverse order of removal. Use new gaskets when connecting the exhaust pipe flange connections. Run the engine and check for exhaust leaks.