Express 4500 V8-6.6L DSL Turbo (2009)
Positive Crankcase Ventilation Valve: Service and Repair
Positive Crankcase Ventilation Valve Replacement
Removal Procedure
1. Remove the engine cover. Refer to Engine Cover Replacement (See: Body and Frame/Access Cover/Service and Repair).
2. Remove the positive crankcase ventilation (PCV) cover screws.
3. Remove the PCV cover, diaphragm, and spring.
4. Clean and inspect the cover, diaphragm and spring.
5. Discard the diaphragm if damage is found.
Installation Procedure
1. Install the spring, diaphragm and cover.
