C 3500 Truck 2WD V8-6.6L DSL Turbo VIN 1 (2002)
8. Disconnect the fuel return line (1) from the right front cylinder head.
9. Install the black hose (1) from the J 45873 on to the each cylinder head return port and install the J23738-A onto the black hose on the right
cylinder head.
10. Apply 15 inches Hg of vacuum to the port.
11. Install the J23738-A to the black hose on the left cylinder head return port and apply 15 inches Hg of vacuum.
^
If the vacuum holds on both sides, replace the fuel return line between the cylinder head return ports.
^
If the vacuum does not hold on one or both sides, go to step 12.
12. Perform the lower valve cover removal procedure for the bank(s) that did not hold vacuum. Refer to Valve Rocker Arm Cover Replacement -
Lower Right and Valve Rocker Arm Cover Replacement - Lower Left in Engine. Then go to step 13.
13. Connect the fuel return line to the right front cylinder head.
Tighten
Tighten the bolts to 15 N.m (11 lb ft).
