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Home >> GMC >> 1983 >> Forward Control 5.7 M, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - Diesel >> Testing >> Injection Nozzle >> Test Preparation
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Test Preparation

  1. Remove injection nozzle from engine. Clean carbon from tip area of nozzle with soft brass brush. DO NOT  use steel brush or motorized brush to clean nozzle tip. Damage to nozzle tip may result.
  2. Connect nozzle assembly to injection nozzle tester. Close tester shut off valve to pressure gauge. Fill tester with test fluid. Fill and flush nozzle assembly with test oil by operating tester lever briskly and repeatedly. This purges air from nozzle and coats all parts with test fluid.
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