Cummins Injector Connector Tube, Dodge (2003-07) 5.9L Cummins
The connector tube transfers fuel from the injection line at the outside of the cylinder head to the fuel injector which is located in the center of the cylinder head. The connector tube fits into a tapered opening in the injector and forms a metal-to-metal seal. Leakage here is a common problem which causes hard start and no-start symptoms. Torque on the connector tube nut is VERY critical and must be 37 ft-lbs. It is highly recommended to replace the connector tube at the time of injector replacement. If an old connector tube is re-used, a repeat leakage failure can occur, damaging the body of the new injector (which is not a warrantiable failure). New connector tubes are relatively inexpensive insurance!
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