Wind Noise or Water Leak at Top of Door Glass - Adjustment Tips - kw adjust air convertible door fit gap glass moisture noise pillar position seal water weatherstrip whistle

The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.

Vehicle may have a concern with windnoise and or waterleaks at the door glass to weatherstrip (w/s) contact area.

Windnoise and waterleak issues in this area are often the result of a mispositioned door glass. When adjusting door glass, attention should be focused on the glass fit at the rear and top edge first. Note that there is no need to remove the water deflector to perform any of the adjustments covered here.

TIP IN ADJUSTMENT reference SI document number 657148

1. Remove both access plugs from the bottom of the door (1 front bottom side, 1 rear inner side).
2. Loosen the jack screw jam nut. Turn jam nut clockwise to tip out, counter cw to tip in.
3. If no more adjustment is available, loosen both the forward and aft upper guide nuts, and bend the welded channel bolts downward and retighten. This will increase the inward angle of the glass. Loosen the 10mm nut at the bottom of the front channel, lower the glass and tighten the nut. This will align the front channel to the rear and prevent the glass from binding. Tip in should be added until door glass will not role up and then backed off slightly. Maxing out both front and rear tip in would likely result in the windows not rolling up. If by some chance a door to fender fit concern was corrected by adjusting the door out (rather than bring fender in which is more involved), tip in could be maxed out in that situation. The door glass should be flush or inboard (0 mm up to -2 mm) to the w/s retainer. (This can easily be checked with a straight edge (credit card).

HEIGHT ADJUSTMENT reference SI document number 657151and 657152.

Also Window Installation Procedure.

Remove the front and rear butyl patches and loosen the 10 mm bolts for the glass to regulator sash blocks. Raise the blocks with a screwdriver to increase up travel but do not lift the glass itself as it will dislodge.

.

FORE and AFT ADJUSTMENT reference document number 657147.

Fore and aft adjustments are made at the same time as height. Door glass edge to w/s retainer should have a gap of 5 to 8 mm across the top of the glass. Rear door glass edge to B-Pillar w/s retainer should have a gap of 7 to 9 mm. Be sure that the rear edge of the door glass is far enough back to rest on the "soft" portion of the B-Pillar (or rear) weatherstrip. If the glass is adjusted too far, back the edge will rest on the "stiff" portion of the w/s.

Check for the correct blow out clip adjustment of 4 mm (2 quarters) thickness between the glass. This can be tapped with a rubber mallot to adjust. Clip could be tweaked to 3mm. Note on door switch removal - Pass side - lift front edge of switch first. Driver side - lift rear edge first. There is a tab on the edge that could be damaged if improperly removed. Door switches are interchangeable side to side. There is a special section on Waterleaks in the 2001 YB Service Manual, B3/3 pages 8-768 to 8-784 and on Air/Wind Noise pages 8-785 to 8-787. SI document number 424696 (TSB 83-15-02) also contains the information.

.

Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.

(1997-2004 Chevrolet Corvette)

.