Check Valve: Service and Repair

REMOVAL
1. Disconnect and isolate the battery negative cable.
2. Remove the wiper arms from the wiper pivots. (Refer to ELECTRICAL/FRONT WIPERS/WASHERS/FRONT WIPER ARMS - REMOVAL).
3. Open the hood and pull the hood to plenum seal off of the forward flanges of the cowl grille cover and the plenum panel.

Fig.3 Cowl Grille Cover Remove/Install:

4. Remove the six plastic nuts (2 short and 4 long) that secure the cowl grille cover to the studs on the cowl top panel near the base of the windshield.
5. Lift the left end of the cowl grille cover off of the cowl plenum panel far enough to access the front washer plumbing.
6. Disconnect the engine compartment washer hose from the cowl grille cover washer hose at the plastic elbow connector.
7. Remove the cowl grille cover from the cowl plenum and cowl top panels through the opening between the hood and the base of the windshield.
8. From the underside of the cowl grille cover, disconnect the washer hoses from the three barbed nipples of the wye fitting/check valve unit.
9. Remove the wye fitting/check valve unit from the underside of the cowl grille cover.

INSTALLATION
1. Position the wye fitting/check valve unit to the underside of the cowl grille cover.
2. From the underside of the cowl grille cover, reconnect the three washer hoses to the barbed nipples of the wye fitting/check valve unit.
3. Reinstall the washer hoses for the front washer nozzles into their routing clips on the underside of the cowl grille cover.
4. Position the cowl grille cover onto the cowl plenum and cowl top panels through the opening between the hood and the base of the windshield.
5. Lift the left end of the cowl grille cover off of the cowl plenum panel far enough to access the front washer plumbing.
6. Reconnect the cowl grille cover washer hose to the engine compartment washer hose at the elbow connector.
7. Install the six plastic nuts that secure the cowl grille cover to the studs on the cowl top panel near the base of the windshield. These nuts are to be installed by pushing them onto the studs in the following sequence:
a. First, install the short nuts to the third stud from the right, then the second stud from the left.
b. Next, install the long nuts to the right outboard stud, then the left outboard stud.
c. Finally, install the two remaining long nuts to the third stud from the left, then the second stud from the right.
8. Starting at the ends and working toward the center, push the hood to plenum seal onto the forward flanges of the cowl grille cover and the plenum panel.
9. Reinstall the wiper arms onto the wiper pivots. (Refer to ELECTRICAL/FRONT WIPERS/WASHERS/FRONT WIPER ARMS - INSTALLATION).
10. Reconnect the battery negative cable.