C7 Industrial Engines Specifications – Engine Oil Lines

Installation of the High Pressure Oil Line

  1. Thread connector assembly (1) by hand before additional tightening.


  1. Torque the connector assembly (1) to 48 ± 5 N·m (35 ± 4 lb ft).


  1. Align the two nuts on tube assembly (2) to the fuel pump (4) and the connector assembly (1) .

Note: Use a wrench on the connector assembly and a wrench on the nut in order to tighten the nut.


  1. Torque the two nuts on tube assembly (2) to 40 ± 4 N·m (30 ± 3 lb ft).


  1. Hold the elbow assembly on the fuel pump in position with a second wrench. Torque the jam nut to 24 ± 2 N·m (18 ± 1 lb ft).

Installation of the Low Pressure Oil Line

  1. Install the port connection into the low pressure port of the unit injector hydraulic pump.


  1. Tighten the tube connection (5) to the port connector.


  1. Tighten the base of the tube assembly (6) onto the engine block.


  1. Torque the fittings to the standard torque.
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