Operation CHARM: Car repair manuals for everyone.
Home >> Cadillac >> 2007 >> XLR V8-4.6L >> Repair and Diagnosis >> Powertrain Management >> Emission Control Systems >> Positive Crankcase Ventilation >> PCV Valve Hose >> Service and Repair
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

PCV Valve Hose: Service and Repair



Crankcase Ventilation Hoses/Pipes Replacement

Removal Procedure




1. Remove the fuel injector sight shield.




2. Disconnect the positive crankcase ventilation (PCV) fresh air tube from the left camshaft cover.
3. Remove the PCV fresh air tube from the air cleaner housing assembly.




4. Disconnect the PCV dirty air tube from the right camshaft cover.




5. Remove the PCV dirty air tube (2) from the intake manifold.

Installation Procedure

Important: Ensure that the PCV dirty air tube is located between the tabs of the intake manifold.




1. Connect the PCV dirty air tube to the intake manifold fitting.
2. Connect the PCV dirty air tube to the right camshaft cover.




3. Attach the retaining clip (3) to the intake manifold.




4. Connect the PCV fresh air tube to the left camshaft cover.




5. Connect the PCV fresh air tube to the air cleaner housing.
6. Install the fuel injector sight shield.

pro multis · About Operation CHARM