Installation Procedure

NOTE:

Use care when servicing the fuel system components, especially the fuel injector electrical connectors, the fuel injector tips, and the injector O-rings. Plug the inlet and the outlet ports of the fuel rail in order to prevent contamination.
Do not use compressed air to clean the fuel rail assembly as this may damage the fuel rail components.
Do not immerse the fuel rail assembly in a solvent bath in order to prevent damage to the fuel rail assembly.

Fig 1: View Of Common Rail Regulator And Components

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: The common rail regulator and O-ring must not be reused.

Inspect and clean the threads and the sealing surface of the fuel rail.
Inspect and clean the threads (1) and bite edge (2) of the common rail regulator.

Fig 2: View Of Fuel Rail

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Fastener Notice .

Install the common rail regulator using a commercial wrench WAF30 counteracting with a wrench WAF35 at the hexagon of the housing.
Tighten: Tighten the common rail regulator to 60 N.m (44.3 lb ft) and turn the regulator 90 degrees in the opposite direction and then tighten to 85 N.m (62.7 lb ft) .
Prime the fuel system. Refer to Fuel System Priming .