Windnoise - Diagnosis and Service
91ford14
Article No.
91-6-3
03/18/91
WINDNOISE - DIAGNOSIS AND SERVICE TIPS
FORD: 1985-91 CROWN VICTORIA
LINCOLN-MERCURY: 1985-89 TOWN CAR
1985-91 GRAND MARQUIS
This is article is being republished in its entirety to correct the Town Car model year application.
ISSUE: Windnoise heard inside the passenger compartment may be caused by outside air turbulence and inadequate passenger compartment sealing.
ACTION: Use the following pictorial diagnostic procedure to isolate and correct sources of windnoise.
Aero styling, limousine doors and flush mounted glass have helped reduce drag, thereby reducing air turbulence. In addition, other improvements have been made to reduce overall vehicle noise levels:
^ Improved tire tread design - reduces road noise
^ Redesigned sound packages - reduce road and engine noise
^ Overdrive transmission - reduces engine noise at high speeds
^ Improved primary weatherstrips and body sealers - improve sealing
Figure 1:
Figure 2:
1. Refer to Figure 1 Locations A through J, and Figure 2, Locations A and B, for common areas where air leaks, windnoise or turbulence may occur.
2. Road test the car.
3. Using a stethoscope determine the location of the windnoise.
NOTE: IT IS RECOMMENDED THAT ANOTHER PERSON RIDE WITH YOU TO EVALUATE THE PASSENGER'S SIDE OF THE CAR.
4. To diagnose and correct any common windnoise areas, refer to the appropriate illustrations.
Figure 1:
FIGURE 1: Shows an inside view of the car, (right hand side) identifying common potential air leak areas. If an air leak is found, refer to the appropriate corresponding illustrations for service tips.
Figure 2:
FIGURE 2: Shows an outside view of a car with a Carriage type roof. It shows the common potential air turbulence areas.
^ Location A - Shows application of clear silicone sealer under the lip of the Carriage roof.
^ Location B - Shows application of clear silicone sealer at the top of the "C" pillar at the roof line of the Carriage roof.
Figure 3:
Figure 4:
LOCATION - A (Figures 3 and 4)
^ View A1 - Shows the nose area of the front door with the "Mucket" seal in position. If a "Mucket" seal is not present refer to View A2.
^ View A2 - Shows the installation of the forward front door "Mucket" seal.
Figure 5:
Figure 6:
LOCATION - B (Figures 5 and 6)
^ View B1 - Shows silicone application to the vent window flocked run after removal from the window and vent divider frames.
^ View B2 - Shows silicone application to the door window flocked run removed from the vent divider and window frames.
Figure 7:
LOCATION - C (Figure 7)
^ View C1 - Shows a foam tape seal application to the interior roof rail garnish moulding.
Figure 8:
Figure 9:
Figure 10:
Figure 11:
LOCATION - D (Figures 8, 9, and 10)
^ View D1 - Shows spray foam sealer application to the forward inner opening of the upper "B" pillar sheet metal.
^ View D2 - Shows spray foam sealer application to the rearward inner opening of the upper "B" pillar sheet metal.
^ View D3 - Shows spray foam sealer application into the lower front "B" pillar to rocker joints.
^ View D4 - Shows spray foam sealer application into the lower rear "B" pillar to rocker joints.
Figure 12:
Figure 13:
LOCATION - E (Figures 12 and 13)
^ View E1 - Shows compression points above the belt line of the primary front door weatherstrip seal.
^ View E2 - Shows rework of the outboard weatherstrip flange to improve the compression points above the belt line of the primary front door weatherstrip seal.
Figure 14:
LOCATION - F (Figure 14)
^ View F1 - Shows the installation of the front door rear "Mucket" seal.
Figure 15:
LOCATION - G (Figure 15)
^ View G1 - Shows application of a butyl sealer patch to the opening at the lower center of the "B" pillar.
Figure 16:
Figure 17:
LOCATION - H (Figures 16 and 17)
^ View H1 - Shows the opening (gap) at the front of the rear door with the trim panel installed.
^ View H2 - Shows installation of the "Mucket" seal at the front of the rear door with the trim panel removed.
Figure 18:
LOCATION - J (Figure 18)
^ View J1 - Shows application of butyl sealer to the notches of the upper rear door division bar.
PART NUMBER PART NAME CLASS
D6AZ-19562-AA Silicone Sealer - Clear B
D6AZ-19562-BA Silicone Sealer - Black B
D9AZ-19562-A Butyl Tape V
E4AZ-19627-B Foam Tape BM
EOVY-5420568-A Mucket Seal - Front Door (RH C
Front)
EOVY-5420569-A Mucket Seal - Front Door (LH C
Front)
E8VY-5420266-A Mucket Seal - Front Door (RH C
Rear)
E8VY-5420267-A Mucket Seal - Front Door (LH C
Rear)
E8VY-5425536-A Mucket Seal - Rear Door (RH C
Front)
E8VY-5425537-A Mucket Seal - Rear Door (LH C
Front)
D6AZ-19560-A Butyl Patch AG
OTHER APPLICABLE ARTICLES: None
SUPERSEDES: 91-4-2
WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION DESCRIPTION TIME
910603 Actual Time
DEALER CODING
BASIC PART NO. CONDITION CODE
ENTRE 26
OASIS CODES: 110000, 701000