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HEATER CONTROL VALVES Heater Control Valves HEATER CORES Heater Cores Cracked A Require replacement. Dented (fluid type only) A Require replacement. Keyway distorted A Require repair or replacement. Leaking (Fluid damper only) A Require replacement. Loose A Require replacement. Noisy A Require replacement. Outer ring slipped out of position A Require replacement. Positioned incorrectly A Require repair or replacement. Rubber damping material deteriorated 1 Suggest replacement. Seal surface worn, causing a leak A Require repair or replacement. Threads damaged A Require repair or replacement. Threads stripped (threads missing) A Require replacement. Condition Code Procedure Attaching hardware broken A Require repair or replacement of hardware. Attaching hardware missing C Require replacement of hardware. Attaching hardware not A Require repair or replacement of hardware. Bypassed A Require replacement. Coolant leak A Require repair or replacement. Malfunctioning A Require repair or replacement. See note below. NOTE: Includes inoperative, intermittent operation, or failure to perform all functions. Missing C Require replacement. Restricted A Require repair or replacement. Vacuum leak A Require repair or replacement. Condition Code Procedure Air flow restriction A Require repair or replacement. Attaching hardware broken A Require repair or replacement of hardware. Attaching hardware missing C Require replacement of hardware. Attaching hardware not functioning A Require repair or replacement of hardware.
1998 Chevrolet Pickup C1500 Uniform Inspection and Communication Standards ENGINE PERFORMANCE AND MAINTENANCE
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