Cummins N14 STC, Celect, Celect Plus – Service Manual 011-999   Exhaust System – Overview

Table of Contents

General Information

General Information


The exhaust manifold group consists of the exhaust manifolds and the turbocharger mounting studs.

The exhaust manifold utilizes a wear coating on the sealing surfaces of the manifold sections for improved sealing characteristics and reliability.

The N14 engine series also incorporates the towerless capscrew mounting boss design exhaust manifolds. The capscrew mounting boss “towers” have been removed from the manifold castings and replaced with spacers. The spacers insulate the capscrews from the hot temperatures which results in more consistent and controlled clamp loads at the manifold-to-cylinder head interface.


Special high temperature resistance exhaust manifold mounting capscrews are required to mount the exhaust manifold. Use only the special capscrews, Part Number 3067930, to mount the exhaust manifold assembly to the cylinder head.

Last Modified:  07-Oct-2011