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. Refer to Engine Cover Replacement in Interior Trim.



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.

1. Install the CDR valve into the valve cover.
2. Connect the hose.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

3. Install the clamp.

Tighten
Tighten the clamp to 1.7 N·m (15 lb in).

4. Install the CDR retaining bracket and nut.

Tighten
Tighten the bracket nut to 23 N·m (17 lb ft).

5. Install the engine cover. Refer to Engine Cover Replacement in Interior Trim.