Positive Crankcase Ventilation Valve: Service and Repair
Crankcase Depression Regulator (CDR) Valve ReplacementRemoval Procedure
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.
Refer to the appropriate service information for the diesel crankcase ventilation system maintenance requirements.
1. Remove the engine cover.
2. Remove the nut and the bracket for retaining the CDR valve.
3. Remove the hose clamp at the CDR valve.
4. Disconnect the hose from the CDR valve.
5. Remove the CDR valve by pulling straight up.
Installation Procedure
1. Install the CDR valve into the valve cover.
2. Connect the hose.
Notice: Refer to Fastener Notice in Service Precautions.
3. Install the clamp.
^ Tighten the clamp to 1.7 Nm (15 inch lbs.).
4. Install the CDR retaining bracket and nut.
^ Tighten the bracket nut to 23 Nm (17 ft. lbs.).
5. Install the engine cover.