Windshield Molding - Hum Or Whistle Above 70 Mph

Classification:
BT00-017

Reference:
NTB00-069

Date:
August 18, 2000

2000 SENTRA HUM OR WHISTLE NOISE AT UPPER WINDSHIELD MOLDING

APPLIED VEHICLES:
2000 Sentra (B15)

SERVICE INFORMATION





Use the procedure in this bulletin to diagnose and repair an applied vehicle if an intermittent hum or whistle is heard at the upper edge of the windshield (see Figure 1) at speeds above 70 miles per hour. The noise may sound as if it is coming from the dash area or appear to be wind noise. The noise may be caused by a "reed effect," in which air passing over the upper molding lip causes the rubber to lift and vibrate against the roof panel.

SERVICE PROCEDURE

Diagnosis:

1. Drive the vehicle under the conditions described by the customer to verify the noise.

2. If the noise is present, apply a good quality masking tape over the upper windshield molding, making sure the upper lip is covered.

3. Road test again:

A. If the noise is still present, this bulletin does not apply. Investigate other causes for the noise and repair as needed.

B. If the noise is no longer present, perform the following Service Procedure Repair to correct the condition.

Repair:

1. Remove the previously applied tape. Carefully apply a new strip of masking tape along the entire upper edge of the roof sheet metal above the windshield molding. This will protect the paint from adhesive (see Figure 1).

2. Insert a plastic pry tool between the windshield molding and roof sheet metal, beginning at the driver's (left) side of the vehicle (see Figure 1).

3. Gently pull the molding out and insert the tip of a 3M Super Weatherstrip Adhesive(TM) applicator tube (3M Part Number 051135-08008) or equivalent directly behind the pry tool (see Figure 1).

4. With a smooth motion, move the adhesive applicator tip to apply a thin and even bead of adhesive along the entire upper back surface of the molding, from the driver's (left) side to the passenger's (right) side.

5. Allow the molding to fall back into place.

6. Gently press the molding down against the roof sheet metal.

7. Clean off any excess adhesive.

8. Allow the adhesive to "cure" for approximately 30 minutes.

9. Remove the masking tape.

10. Road test the vehicle again to verify the noise is gone.

CLAIMS INFORMATION





Submit a Primary Operation (P0) line using the claims coding table shown.