Silverado 3500 2WD V8-6.6L DSL Turbo VIN 2 (2004)
9. Use pipe cleaners (1) to block the ends of the high pressure lines so the abrasive blasting glass beads will not contaminate the inside of the pipes.
Before removing the pipe cleaners, clean them by using regulated compressed air to blow any debris and/or media glass beads from the pipe
cleaners.
10. There may be some area of the fitting or line that the glass beads did not clean very well. Disregard any surface that did not clean up as long as the
area of the fitting is clean at the bite edge or sealing surface. Refer to the above illustration (1). Replace any suspect high pressure line if the glass
beads cannot remove corrosion, scale or rust from the sealing surfaces and/or pitting or any other damage that is found.
11. After cleaning all of the fuel injector high-pressure line fittings with the glass beads, clean by using compressed air to blow any debris and/or
media glass beads from inside and outside of all the fittings and lines. Afterwards, wash thoroughly with All Purpose Parts Cleaner, P/N 88862650
(in Canada, P/N 88901247, Brake Parts Cleaner) or equivalent. Repeat this process until all of the debris and/or media glass beads have been
removed from the fittings and lines.
Fuel Injector Installation
Install the fuel injectors and lines using published service procedures in SI.
Notice
Ensure proper torquing of the fuel injector line fittings (1, 2). An under-torqued fuel injector line will not seal properly and an over-torqued fuel injector
line may damage the fuel injector fitting. An improperly sealed or damaged fuel injector line or fuel injector fitting may cause a fuel leak.
Inspection For Fuel Leaks Into the Engine After Repair
1. Run the engine at idle for 10 minutes. Inspect for external fuel leaks while the engine is running.
2. Stop the engine and wait 10 minutes, then check the engine oil level. This will be the initial oil level.
3. Run the engine at idle for 5 minutes while commanding the fuel pressure to 160 MPa using a scan tool.
4. Stop the engine and wait 10 minutes, then check the oil level.
‹› If the engine oil level is more than 4.7 mm (3/16 in) above the initial oil level, refer to Fuel Leak Diagnosis (Inside of Engine), and Fuel in
Engine Oil procedures in the Engine Controls and Engine Mechanical sections respectively in SI.
‹› If the engine oil level is less than 4.7 mm (3/16 in) above the initial oil level, the repair is complete.
Parts Information
