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Home >> Chevrolet >> 2007 >> TrailBlazer 4WD L6-4.2L >> Repair and Diagnosis >> Powertrain Management >> Emission Control Systems >> Positive Crankcase Ventilation >> PCV Valve Hose >> Service and Repair
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PCV Valve Hose: Service and Repair



Crankcase Ventilation Hoses/Pipes Replacement

Removal Procedure




1. Disconnect the crankcase dirty air hose from the intake manifold.
2. Disconnect the crankcase dirty air hose from the positive crankcase ventilation (PCV) orifice tube.




3. Loosen the throttle body clamps (2).
4. Disconnect the fuel pressure regulator vacuum supply hose from the air cleaner outlet resonator.




5. Remove the 2 resonator to engine bolts (4) from the air cleaner outlet resonator (5).




6. Lift up the front of the air cleaner outlet resonator (2).
7. Disconnect the crankcase clean air hose from the valve cover port.
8. Disconnect the crankcase clean air hose from the air cleaner outlet resonator (2).

Installation Procedure




1. Connect the crankcase clean air hose to the air cleaner outlet resonator (2).
2. Connect the crankcase clean air hose to the valve cover port.

Notice: Refer to Fastener Notice.




3. Install the 2 resonator to engine bolts (4) to the air cleaner outlet resonator (5).

Tighten the bolts to 6 N.m (53 lb in).




4. Tighten the throttle body clamps (2).

Tighten the clamps to 4 N.m (35 lb in).

5. Connect the fuel pressure regulator vacuum supply hose to the air cleaner outlet resonator.




6. Lubricate the inner diameter of the crankcase ventilation hose. Refer to Sealers, Adhesives, and Lubricants for the correct part number.
7. Connect the crankcase dirty air hose to the intake manifold.
8. Connect the crankcase dirty air hose to the PCV orifice tube.

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