Savana 4500 V8-6.6L DSL Turbo (2009)
Notice
After the fuel line is removed and the fuel injector inlet is exposed, DO NOT use compressed air to clean debris. Using compressed air can allow
debris to enter the fuel injector inlet and damage the fuel injector.
6. Immediately after removal of the lower valve cover, use a vacuum source to remove any contamination in the fuel injector inlet (1).
Fuel Injector Cleaning and Inspection
Notice
The fuel injector must be cleaned with the proper cleaning equipment. DO NOT use abrasive cleaning methods such as a metallic brush to remove
deposits. Cleaning an injector with improper tools may damage the fuel injector.
1. Use a soft bristle non-metallic brush and fuel injector cleaner, P/N 88861802 (in Canada, P/N 88861804), or equivalent, to remove any deposits
from the nozzle tip (1) and the copper washer sealing area (2) before reinstallation.
2. Inspect the fuel injector nozzle tip (1) for cracks, dents, or other damage.
3. Inspect the nozzle tip (1) for any signs of discoloration (dark yellow, tan, or blue) due to excessive heat.
Note
For information on injector bore cleaning, refer to Corporate Bulletin Number 05-06-04-067 - Information on New Essential Tool EN-47909
Injector Bore Cleaning Kit for 6.6L Duramax(TM) Diesel Engine.
‹› If any damage is found replace the fuel injector. Clean the fuel injector bore BEFORE installing the new fuel injector.
4. Clean the fuel injector high-pressure lines by performing the following steps:
