Symptom Chart - NVH

WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

NVH SYMPTOM DESCRIPTION

Condition	Possible Sources	Action
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 NOISE, VIBRATION & HARSHNESS . 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 NOISE, VIBRATION & HARSHNESS for the next likely system and continue diagnosis.
Draft/wind noise and water leak around door perimeter	Loose fit seal Seal installed incorrectly Door misaligned Scuff plate installed incorrectly Seal or seal pushpins damaged Sheet metal joints in door or door opening	PINCH seal carrier to improve retention on seal flange. REINSTALL the seal. REALIGN the door. CHECK door gaps and fit in door opening and ADJUST as necessary. REFER to BODY CLOSURES . REINSTALL the scuff plate. INSTALL a new seal/pushpins. SEAL leaks with silicone gasket and sealant.
Draft/wind noise and water leak around glass run	Door glass misaligned Glass run installed incorrectly Leak path behind glass run Glass run channel spread wide Glass run damaged	ADJUST door glass. REINSTALL glass run. INSERT foam in glass run carrier if necessary. INSTALL foam rope behind glass run. PINCH glass run channel to reduce size of opening. INSTALL a new glass run.
Draft/wind noise and water leak at inner belt line	Belt line seal installed incorrectly on flange No contact with side glass No contact with glass runs at both ends of belt line seal Belt line seal damaged	ADJUST seal. (Do not bend the flange.) ADJUST door glass. ADJUST belt line seal or ADD foam at seal ends. INSTALL a new seal.
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 Belt line seal damaged	ADJUST seal. ADJUST door glass. ADJUST belt line seal or ADD foam at seal ends. INSTALL a new seal.
Draft/wind noise at inner door handle/speaker opening	Hole in weathershield Weathershield misaligned Exterior door handle seal misaligned/damaged Speaker or speaker seal missing or damaged	SEAL hole with suitable tape. REALIGN weathershield. INSTALL a new weathershield if pressure sensitive adhesive fails. REALIGN or INSTALL a new seal as necessary. REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS . 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.
Road noise	Missing mastic insulators Missing body insulators	CHECK for missing mastic insulators. REFER to BODY REPAIRS . CHECK for missing body insulators.
Rattles in body/doors and instrument panel	Loose wires/cables Loose objects/components in door wells, pillars quarter trim panels Buzz from instrument panel components	CHECK that all wires/cables are correctly routed and inserted in correct retainers. 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. 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 Mirror sail gasket folded/misaligned Mirror housing trim cap installed incorrectly Air leak through mirror housing hinge Inner sail trim installed incorrectly Inner sail gasket/barrier installed incorrectly Air path through wiring bundle/fastener access holes Exposed fastener access hole on mirror housing/sail	REALIGN with edges shingled to airflow, with no gaps. REINSTALL with gasket unfolded and aligned correctly. REINSTALL with edges shingled to airflow. Fully ENGAGE mirror into its operating position. USE foam to block air path through hinge. REINSTALL sail trim. ADJUST door trim. REINSTALL trim cover with gasket/barrier aligned correctly. BLOCK air path(s) with foam/tape. INSTALL a new cap if missing.
Rattle/vibration from exterior rear view mirror	Mirror glass adjustment screws loose Mirror mounting nuts loose Aftermarket air deflector/stone shields	REMOVE mirror glass and TIGHTEN mirror glass adjustment motor screws. REFER to REAR VIEW MIRRORS . TIGHTEN mirror mounting nuts. REFER to REAR VIEW MIRRORS . 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	Gaps in the sealant bead Air traveling up windshield molding along A-pillar Gaps in sealant bead of windshield/rear glass Windshield/rear glass misaligned or not installed correctly Rear hood seal at base of windshield misaligned/damaged High-mounted stoplamp	APPLY approved sealant. INSTALL foam rope full length of the A-pillar. RESEAL windshield/rear glass. REFER to GLASS, FRAMES AND MECHANISMS . REINSTALL windshield/rear glass. REFER to GLASS, FRAMES AND MECHANISMS . REALIGN or INSTALL a new seal as necessary. CHECK high-mounted stoplamp seal. REPAIR or INSTALL as necessary.
Draft/wind noise and water leak around liftgate perimeter	Loose fit seal Seal misaligned or installed incorrectly Seal misaligned or installed incorrectly Liftgate misaligned Scuff plate misaligned Seal or seal pushpins damaged	PINCH seal carrier to improve retention on seal flange or INSERT foam in carrier. REINSTALL seal. REINSTALL seal. REALIGN liftgate. CHECK liftgate fit in body opening and ADJUST as necessary. REINSTALL scuff plate. INSTALL a new seal.
Draft/water leak or noise from roof opening panel	Roof opening panel/components	REFER to ROOF OPENING PANEL for diagnosis.
Wind noise created by airflow over or behind body panels	Fender splash shield misaligned Body panel misaligned (exposed edge) Hood misaligned (front margin) Front grille edge noise	REALIGN fender splash shield. REALIGN appropriate body panel. 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 leading edge on hood Sharp edges due to material imperfections	If possible, ADJUST grille opening panel forward to eliminate wind noise. REMOVE sharp edges (no damage to visible surface).
Wind noise from air extractor (body vent)	Air extractor housing seated incorrectly Air extractor housing or flaps damaged	REINSTALL air extractor housing. INSTALL a new air extractor.
Noise from roof rack	Roof rack rails or crossbars loose Roof rack fasteners missing Roof rack crossbars installed backward Roof rack rub strips partially lifting from roof Roof rack gaskets loose or misaligned	TIGHTEN fasteners. INSTALL approved fasteners. REINSTALL crossbars. REAPPLY adhesive or fasteners or INSTALL new rub strips as necessary. REINSTALL gasket.
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 new as required.