EVAP Hoses/Pipes Replacement - Engine/Chassis

EVAPORATIVE EMISSION (EVAP) HOSES/PIPES REPLACEMENT - ENGINE/CHASSIS

REMOVAL PROCEDURE
1. Remove the engine cover.
2. Clean all the pipe connections and the surrounding areas before disconnecting the pipes in order to avoid possible contamination.




3. Disconnect the chassis EVAP pipe from the engine compartment EVAP purge pipe (9).
4. Raise the vehicle. Refer to Vehicle Lifting.
5. Remove the fuel/EVAP pipes bundle retainer mounting stud (7) from the cylinder head.
6. Remove the fuel/EVAP pipes bundle retainer mounting stud (6) from the transmission.
7. Remove the fuel/EVAP pipes bundle retainer mounting fastener (5) from the crossrail.




8. Disconnect the front chassis EVAP purge pipe from the rear chassis EVAP purge pipe (4).
9. Note the position of the EVAP pipe for aid in installation.
10. Remove the EVAP pipe from the retaining clips.
11. Remove the EVAP pipe.

INSTALLATION PROCEDURE

IMPORTANT:
- When replacing the fuel/EVAP pipes, always replace them with original equipment or parts that meet the GM specifications for those parts. The replacement pipes must have the same type of fittings as the original pipes in order to ensure the integrity of the connection.
- Do not use copper or aluminum tubing to replace steel tubing. Only tubing meeting the 124-M specification or its equivalent is capable of meeting all pressure, corrosion and vibration characteristics necessary to ensure the durability standard required.




1. Connect the front chassis EVAP pipe to the rear chassis EVAP purge pipe (4).




2. Install the EVAP pipe into the transmission bracket retainer.

NOTE: Refer to Fastener Notice in Service Precautions.

3. Install the mounting stud (6).

Tighten
Tighten the mounting stud to 33 Nm (24 lb ft).

4. Install the EVAP pipe into the cylinder head retainer.
5. Install the mounting stud (7).

Tighten
Tighten the mounting stud to 33 Nm (24 lb ft).

6. Install the EVAP pipe into the crossrail retainer.
7. Install the mounting bolt (5) to the crossrail.

Tighten
Tighten the mounting bolt to 11 Nm (97 lb in.).

8. Lower the vehicle.
9. Connect the chassis EVAP pipe to the engine compartment EVAP pipe (9).
10. Install the engine cover.