Nissan 14006-4S102 Exhaust Manifold

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Run the engine and check for exhaust leaks.

Use a scraper to remove all traces of old gasket material and carbon deposits from the exhaust manifold and cylinder head mating surfaces.

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.

Remove the upper heat shield from the exhaust manifold.

Disconnect the cable from the negative terminal of the battery. Block the rear wheels and set the parking brake.