GM/Detroit 6.5L ENGINE CONTROLS – CDR Valve and Hoses Replacement

Removal Procedure
Important: The crankcase depression regulator valve (1) is replaced as an assembly. Replace the hoses (3), pipes (3) and grommet (4) as required, if the inspection indicates any cracks or decay.
Refer to the appropriate service information for diesel crankcase ventilation system maintenance requirements.
1. Remove the clamp (2) at the CDR valve (1).
2. Remove the hose (3) from the CDR valve (1).
3. Remove the CDR valve by pulling straight up.

Installation Procedure
1. Install the CDR valve (1) into the valve cover.
2. Install the hose (3).
Notice: Refer to Fastener Notice in Cautions and Notices.
3. Install the clamp (2).
Tighten the clamp to 1.7 N-m (15 lb in).



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