Most dust and water leaks occur due to missing or mis-installed body sealer or components. The source of the leak is detected by:
Most wind noise leaks occur at the corners of the windows or in the doors. Wind noise is detected by driving the vehicle at highway speeds or at speeds as specified by the customer. The vehicle should be driven in 4 different directions, with all the windows CLOSED, the radio OFF and the A/C blower motor OFF.
Squeak and rattle noises are generally caused by loose parts, contact or relative movement between 2 surfaces or loose wires and connectors. The source of the noise can be detected by stopping movement of the suspect part by hand or by using dampening or low friction materials.
Symptom Chart — NVH
NOTE:
NVH symptoms should be identified using the diagnostic tools that are available. For a list of these tools, an explanation of their uses and a glossary of common terms, refer to
Section 100-04
. Since it is possible that any one of multiple systems may be the cause of a symptom, it may be necessary to use a process of elimination type of diagnostic approach to pinpoint the responsible system. If this is not the causal system for the symptom, refer back to
Section 100-04
for the next likely system and continue diagnosis.
| Condition
| Possible Sources
| Action
|
|---|
- Draft/wind noise and water leak around door perimeter
| | - PINCH seal carrier to improve retention on seal flange.
|
| - Seal installed incorrectly
| |
| | - REALIGN the door. CHECK door gaps and fit in door opening and adjust as necessary. REFER to
Section 501-03
.
|
| - Scuff plate installed incorrectly
| - REINSTALL the scuff plate.
|
| - Seal or seal pushpins damaged
| - INSTALL a new seal/pushpins.
|
| - Sheet metal joints in door or door opening
| - SEAL leaks with silicone gasket and sealant.
|
- Draft/wind noise and water leak around glass run
| | |
| - Glass run installed incorrectly
| - REINSTALL glass run. INSERT foam in glass run carrier if necessary.
|
| - Leak path behind glass run
| - INSTALL foam rope behind glass run.
|
| - Glass run channel spread wide
| - PINCH glass run channel to reduce size of opening.
|
| | |
- Draft/wind noise and water leak at inner belt line
| - Belt line seal installed incorrectly on flange
| - ADJUST seal. (Do not bend the flange.)
|
| - No contact with side glass
| |
| - No contact with glass runs at both ends of belt line seal
| - ADJUST belt line seal or ADD foam at seal ends.
|
| | |
- Draft/wind noise and water leak at outer belt line
| - Belt line seal installed incorrectly on flange (no glass contact)
| |
| - Belt line seal does not contact the glass
| |
| - No contact with glass runs at both ends of belt line seal
| - ADJUST belt line seal or ADD foam at seal ends.
|
| | |
- Draft/wind noise at inner door handle/speaker opening
| | - SEAL hole with suitable tape.
|
| | - REALIGN weathershield. INSTALL a new weathershield if pressure sensitive adhesive fails.
|
| - Exterior door handle seal misaligned/damaged
| |
| - Speaker or speaker seal missing or damaged
| - REPAIR speaker seal or INSTALL a new door speaker.
|
- Draft/wind noise and water leaks at floor pan and grommets
| - Missing or damaged plugs/grommets
| - CHECK plugs/grommets for correct installation or damage. INSTALL new plugs/grommets if necessary.
|
| - Missing mastic insulators
| |
| | - CHECK for missing body insulators.
|
- Rattles in body/doors and instrument panel
| | - CHECK that all wires/cables are correctly routed and inserted in correct retainers.
|
| - Loose objects/components in door wells, pillars quarter trim panels
| - CHECK doors by carefully striking underside of doors with a rubber mallet while listening for rattles in doors and pillars. REMOVE or TIGHTEN loose objects/components.
|
| - Buzz from instrument panel components
| - IDENTIFY which components of the instrument panel are buzzing. SECURE/FASTEN components as necessary, ADD foam or felt as needed if rattle persists.
|
- Door drain holes collecting water
| - Holes clogged with mud or road tar
| - CLEAN drain holes of foreign material with a punch or screwdriver. CHECK drain holes regularly.
|
- Wind noise from exterior rear view mirror
| - Exterior mirror housing misaligned
| - REALIGN with edges shingled to airflow, with no gaps.
|
| - Mirror sail gasket folded/misaligned
| - REINSTALL with gasket unfolded and aligned correctly.
|
| - Mirror housing trim cap installed incorrectly
| - REINSTALL with edges shingled to airflow.
|
| - Air leak through mirror housing hinge
| - Fully ENGAGE mirror into its operating position. USE foam to block air path through hinge.
|
| - Inner sail trim installed incorrectly
| - REINSTALL sail trim. ADJUST door trim.
|
| - Inner sail trim installed incorrectly
| - REINSTALL sail trim. ADJUST door trim.
|
| - Inner sail gasket/barrier installed incorrectly
| - REINSTALL trim cover with gasket/barrier aligned correctly.
|
| - Air path through wiring bundle/fastener access holes
| - BLOCK air path(s) with foam/tape.
|
| - Exposed fastener access hole on mirror housing/sail
| - INSTALL a new cap if missing.
|
- Rattle/vibration from exterior rear view mirror
| - Mirror glass adjustment screws loose
| - REMOVE mirror glass and TIGHTEN mirror glass adjustment motor screws. REFER to
Section 501-09
.
|
| - Mirror mounting nuts loose
| |
| - Aftermarket air deflector/stone shields
| - If possible, REMOVE aftermarket air deflector/stone shield, then ROAD TEST vehicle. If concern is no longer present, ADVISE customer that aftermarket component was causing concern.
|
- Draft/wind noise and water leak around perimeter of all fixed glass
| | |
| - Air traveling up windshield molding along A-pillar
| - INSTALL foam rope full length of the A-pillar.
|
| - Gaps in sealant bead of windshield/rear/roof glass
| |
| - Windshield/rear/roof glass misaligned or not installed correctly
| |
| - Rear hood seal at base of windshield misaligned/damaged
| - REALIGN or INSTALL a new seal as necessary.
|
| - Gaps in sealant bead of roof appliques
| |
| - Roof appliques misaligned or not installed correctly
| |
| - Cowl seal misaligned/damaged
| - REALIGN or INSTALL a new seal as necessary.
|
- Wind noise created by airflow over or behind body panels
| - Fender splash shield misaligned
| - REALIGN fender splash shield.
|
| - Body panel misaligned (exposed edge)
| - REALIGN appropriate body panel.
|
| - Hood misaligned (front margin)
| - CHECK hood gaps and fit. ADJUST hood as necessary.
|
| | - APPLY foam in hollow areas behind louvers.
|
- Wind noise created by grille opening panel
| - Grille relationship to leaking edge on hood
| - If possible, ADJUST grille opening panel forward to eliminate wind noise.
|
| - Sharp edges due to material imperfections
| - REMOVE sharp edges (no damage to visible surface).
|
- Wind noise from air extractor (body vent)
| - Air extractor housing seated incorrectly
| - REINSTALL air extractor housing.
|
| - Air extractor housing or flaps damaged
| - INSTALL a new air extractor.
|
- Air leak at top of A-pillar — vehicles with a convertible top
| - Seal at windshield heater installed incorrectly
| |
| | - FILL seal with foam to reshape it.
|
| - Gap between side rail and header seal at A-pillar
| |
- Air leak at rear quarter glass (division bar) — vehicles with a convertible top
| - No contact/torn seal between front side glass and quarter glass division bar
| - CHECK the rear quarter glass division bar seal for a torn seal. If the seal is torn, INSTALL a new rear quarter window glass. REFER to
Section 501-11
. If there is no contact, ADJUST the rear quarter glass and front door glass. REFER to
Section 501-11
.
|
- Air leak or wind noise from top of side glass — vehicles with a convertible top
| - Gap between side rail and vinyl top
| - ADD additional foam tape to seal between side rail and vinyl top.
|
| - Seal at windshield header installed incorrectly
| |
| - Seal damaged between side rail and vinyl top
| |
| | - INSPECT vinyl top. INSTALL a new vinyl top as necessary. REFER to
Section 501-18
.
|
- Air leak or wind noise at windshield header — vehicles with a convertible top
| - Vinyl top not flush with header
| - ADJUST J-hook to lower the top to achieve a flush condition.
|
| - Seal at windshield header installed incorrectly
- Header seal not flush with header
| |
- Convertible top flapping with the top up
| - Vinyl top contacting interior headliner
| - Working from front to back, INSTALL a 6.35 mm (0.25 in) foam sheet between headliner and vinyl top at suspected area. Allow a clearance of 50 mm (2 in) 75 mm (3 in) away from roof bows and side rails.
|
- Wind noise from bug shield/exterior windshield sun visor
| - Turbulence created by location and shape
| - DETERMINE if an OEM part or aftermarket. If aftermarket ADVISE customer accordingly. If OEM, VERIFY correctly installed. If noise is abnormal repair or INSTALL a new as required.
|
- Water behind the front side kick panels/on the front floor
| - Leafscreen/cowl grommets missing/not seated
| - INSPECT for correct installation of leafscreen/cowl grommets.
|
| - Loose A-pillar window weather stripping retainer
| - INSPECT for correct installation of A-pillar weather stripping retainer.
|
| - Misaligned body harness grommet from the passenger door
| - INSPECT for correct installation of body harness grommet.
|
| - Glass roof vehicles only: leak under the glass roof front applique
| |
| - Glass roof only: glass roof leaking rear applique
| |
| - Rear window glass is not sealed correctly
| |
- Water sloshing sound when going around turns
| - Leafscreen/cowl panel not sealed against windshield/warped
| - INSPECT for correct cowl panel installatiion.
|
| - Leafscreen/cowl grommets loose/missing/not seated
| - INSPECT for correct installatiion of leafscreen/cowl grommets.
|
| - Incorrectly applied sealer on cowl panel to bulkhead pinch weld
| - Apply Motorcraft® Seam Sealer to pinch weld as required.
|