Roadmaster V8-305 5.0L (1992)
Weatherstrip: All Technical Service Bulletins
Interior - Windnoise Diagnostic Tips
Bulletin: 92-10-66
Date: Nov. '92
Ref.No.: 92-314-10
Corp.Ref.No.: 231059
SUBJECT:
WINDNOISE (INFORMATIONAL)
MODELS AFFECTED:
1991-92 ROADMASTER ESTATE WAGONS
1992 ROADMASTER SEDANS
Customer comments regarding windnoise on 1991-92 Roadmaster Estate Wagons and 1992 Roadmaster Sedans may be addressed by using the
procedures on the individual items listed in this bulletin.
Proper diagnosis may be made with a variety of tools and methods including stethoscopes, dust guns, sonic instruments, visual inspections, dollar bill
method etc. It is important to remember that windnoise can best be described as air leaking from inside of the vehicle outward while traveling at highway
speeds. Turbulence or windrush is best described as air passing over and around body openings and moldings.
Prior to any repairs, the front door, auxiliary weatherstrips and door opening weatherstrips should be visually inspected for proper gaps, fits, weatherstrip
contact, and sealing. The vehicle should also be road tested to determine location and degree of windnoise/turbulence on the vehicle.
Some primary areas of windnoise may be:
1.
Upper "A" pillar door opening weatherstrip to door frame.
2.
Front window run channel to door frame.
3.
Rear door window run channel to door frame.
Some primary areas of windrush may be:
4.
Front edge of the rear door may be outboard slightly of the front door.
5.
Windshield side reveal moldings gap to glass along the "A" pillar.
The recommended materials to be used with the following procedures are:
3M Auto Bedding + Glazing - Part Number: 08509
American Sure Seal (Bedding Compound) - Part Number: CGB
Kent Auto Bedding and Glazing Compound - Part Number: 10255
Kent Tracing Powder - Part Number: 20065
3M and American Sure Seal Inc. (Can be purchased locally).
Kent Products (Can be purchased by calling 1-800-654-6333).
"We believe these sources and their product to be reliable. There may be additional manufacturers of such products. General Motors does not endorse,
indicate any preference for or assume any responsibility for the products from these firms or for any such items which may be available from other
sources."
1.
Door opening weatherstrip to door frame.
If test indicates noise in this area, one of the simplest and most effective checks for weatherstrip leaks is the tracing powder or chalk test. First,
clean the weatherstrip surface with glass cleaner. Next, apply the powder or chalk to the weatherstrip's mating surface. Press the panel against its
mating surface firmly, without slamming, closing it completely. When you reopen it, there will be an imprint left wherever the weatherstrip made
good contact with the mating surface. Gaps in the imprint of the tracing powder on the weatherstrip indicate a poor seal surface. Adjust the door
inboard to obtain necessary contact.
2.
Front door window run channel to door frame.
