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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 431 (Engine Mechanical - 6.5L (On-Vehicle)) >> Removal & Installation >> Crankcase Depression Regulator (CDR) Valve >> Removal & Installation

Removal & Installation

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NOTE: The Crankcase Depression Regulator (CDR) valve is replaced as an assembly. Replace the hose, the pipe, and the grommet as required, if the inspection indicates cracks or decay.

Remove the engine cover. Remove the nut and the bracket for retaining the CDR valve. Remove the hose clamp at the CDR valve. Disconnect the hose from the CDR valve. See Fig 1. Remove the CDR valve by pulling straight up. Install the CDR valve into the valve cover. Connect the hose. Install the clamp and tighten to specifications. See TORQUE SPECIFICATIONS . Install the CDR retaining bracket and nut. Tighten nut to specifications. See TORQUE SPECIFICATIONS . Install the engine cover.

Fig 1: Identifying Crankcase Depression Regulator Valve
G00307765Courtesy of GENERAL MOTORS CORP.