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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine Control System & Fuel System - 6.6L (LLY) - Introduction (2 Of 2)) >> Repair Instructions >> Fuel Injector Replacement (Right) >> Fuel Injector Cleaning and Inspection

Fuel Injector Cleaning and Inspection

WARNING: This page is about a different variant/trim than selected.
IMPORTANT: If reusing the old injectors perform the following:
    Fig 1: View Of Fuel Injector Nozzle Tip & Copper Washer Sealing Area
    GM1336202Courtesy of GENERAL MOTORS CORP.
  1. Use a soft bristle non-metallic brush and Top Engine Cleaner, GM P/N 1052626 or equivalent, to remove any deposits from the nozzle tip (1) and the copper washer sealing area (2) before re-installation.
  2. Inspect the fuel injector nozzle tip (1) for any signs of discoloration (dark yellow, tan or blue) due to excessive heat.
  3. Replace the injector if any damage is found.
    4. Fig 2: View Of Fuel Injector Sealing Surfaces
    GM1336212Courtesy of GENERAL MOTORS CORP.
  4. Clean the fuel injector high pressure line.
  5. Inspect the fuel injector line for excessive corrosion or damage to the sealing surfaces (1, 2). Replace the line if any damage is found.
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