Cummins N14 STC, Celect, Celect Plus – Service Manual 010-023   Air Intake Manifold

Disconnect the intake air piping from the charge-air cooler to the inlet air connector.

Disconnect the air supply line from the air compressor to the intake manifold.

Remove the Compuchek® sensors.

Remove the intake manifold temperature and pressure sensors.

Remove the four capscrews that attach the intake air connector to the intake manifold.

Remove the nine capscrews and remove the intake manifold.

Inspect the intake manifold for cracks, fretting, or other damage.

Clean and inspect the mating surfaces on the cylinder head for cracks and fretting.

Replace the manifold if cracks or other damage are found.

Use new gasket(s) and install the intake manifold onto the cylinder head mounting surfaces.

Install and tighten the nine capscrews.

Install the compressor supply air line from the air compressor to the intake manifold.

Install the intake air connector and tighten the four capscrews.

Install the intake air piping from the charge-air cooler to the air inlet connection on the intake manifold and tighten the clamp.

Install all Compuchek® sensors.

Install the intake manifold temperature and pressure sensors.