T-Top - Water Leaks to Interior

91chevy17

Number: 91-319-10

Section: 10

Date: MAY 1991

Corp. Bulletin No.: 631002R

Subject: TWIN LIFT-OFF PANEL WATERLEAKS

Model and Year: 1982-91 CAMARO

THIS BULLETIN CANCELS AND SUPERSEDES DEALER SERVICE BULLETIN NO. 86-129, DATED JULY 1986. THE MODEL YEARS HAVE BEEN UPDATED, PART NUMBER CHANGES AND INFORMATION ON COMPONENT IDENTIFICATION ADDED. ALL COPIES OF 86-129 SHOULD BE DISCARDED.

CONDITION: Some customers may comment about waterleaks on "F" style vehicles equipped with twin lift off hatch roof panels (CC1 option).

CAUSE: May include one or more of the following:
- skips or voids in sealers on the roof weatherstrips
- weatherstrip butt joints, improper contact
- skips or voids in sealing of center "T" bar
- improper door glass to weatherstrip contact

DIAGNOSIS: 1. Should be performed by watertesting the vehicle with the garnish moldings removed from the windshield pillar, lock pillar and lift off panel.
2. Should be performed by the technician doing the repairs.
3. Should refer to the chart included in this bulletin to aid in diagnosis.

CORRECTION: Repairs should be attempted only after the car has been properly watertested and diagnosed. It will not be necessary in all cases to replace weatherstrips.

WATERTEST STAND SPECIFICATIONS:

The illustrations in this bulletin depict components on early style (1982-83) vehicles. The waterleak information remains correct regardless of year being repaired.

MATERIALS:
FOR ADHESIVES/SEALANTS USE: 3M # 08011, AMERICAN/DOMINION SURE SEAL # BSSG-B OR GM # 12345097.
FOR CAULKING MATERIAL USE: 3M # 08578 OR AMERICAN/DOMINION SURE SEAL BSC.
Materials other than those listed above may be comparable, but only the material specified is recommended.

NOTES: PART NUMBERS: 1982 TO 1987, 1988 2ND Type and 1989 to 1991 Weatherstrip, lift off panel opening on body - 10198208 - 9 Weatherstrip, side roof rail on lift off glass - 10165500

PART NUMBERS: 1988 1ST Type
Weatherstrip, lift off panel opening on body - 10064450 - 1
Weatherstrip, side roof rail on lift off glass - 10165500

NOTES: COMPONENT IDENTIFICATION

1. 1988 1st. design components have interlocking features on the opening weatherstrips and retainers. These components must not be intermixed with 1988 2nd. design and other years. The panel weatherstrip and retainers are common between various designs.

2. 1982 -1987, 1988 2nd. design and 1989-1991 are common in design.

3. The panel weatherstrip no longer attaches with screws to the panel at the butt joint locations, and must be glued into position.

4. The latest weatherstrips are silicone coated to reduce squeaking/ticking noises of glass to weatherstrips. If weatherstrip replacement is required, both (opening and panel) should be replaced as a set to obtain the best anti-squeak results and maintain appearance (gloss levels).

Parts are currently available from GMSPO.

Use published operations and time allowances.

FIGURE 1:

WATERLEAK DIAGNOSIS CHART

WATER ENTRY AT PROBABLE CAUSE(S) OF LEAK ILLUSTRATED ON

- Headliner - between twin - Skips or voids in sealing of body - Figure # 1
lift-off roof panels or seams underneath twin lift-off
at rear of roof. panel center upper finishing
molding.

FIGURE 2:

WATER ENTRY AT PROBABLE CAUSE(S) OF LEAK ILLUSTRATED ON

- Outboard corners of weatherstrip - Skips or voids in the caulking - Figure # 2
between roof sheet metal and or bridge material between the
weatherstrip. weatherstrip and roof sheet
metal

FIGURE 3:

FIGURE 4:

FIGURE 5:

WATER ENTRY AT PROBABLE CAUSE(S) OF LEAK ILLUSTRATED ON

- Any area between roof portion - Skips or voids in weatherstrip - Figure # 3
of weatherstrip and retainers adhesive
or at outboard ends of - Figure # 4
retainers. - Skips or voids in Secondary Sealing - Figure # 5

FIGURE 6:

FIGURE 7:

WATER ENTRY AT PROBABLE CAUSE(S) OF LEAK ILLUSTRATED ON

- Twin lift-off panel between glass - Skips or voids in urethane adhesive - Figure # 7
and outer plastic support panel.

FIGURE 8:

WATER ENTRY AT PROBABLE CAUSE(S) OF LEAK ILLUSTRATED ON

- Door glass to side weatherstrips - Misaligned, misadjusted twin lift-off - Figure # 8
(especially at the butt joint panel weatherstrip at butt Joints.
areas)
- Misaligned, misadjusted door glass. - Refer to Body portion of Service
Manual.