Lincoln Navigator: Body System - General Information / Body - Overview. Description and Operation

Insulation

Insulation is used as a sound-deadener to reduce exterior road and powertrain noises from the interior of the vehicle. Mastic insulators are also used as insulation. Insulation is installed:

• under the roof.
• above and below the instrument panel.
• at the cowl side panels.
• over the front and rear floorpans.
• inside the B-, C- and D-pillar sections.
• on the wheelhouse/quarter panel.
• behind the rear quarter trim panel.

Other forms of insulation include:

• front tunnel stiffening pad.
• dash panel stiffener.
• rear wheelhouse mastic pads.

It has heat-bonded mastic deadeners for improved NVH characteristics.

It also has sound dampeners located inside the D-pillar and plug holes in the inner rear quarter.

Body Sealer Types and Applications

Seam Sealer

• heavy-bodied, non-sag adhesive/sealer used on standing cosmetic seams, truck bed seams, tooled door skin seams and floorpans.
• can be used on water leaks and noise concerns.

Silicone Gasket and Sealant

• form-in-place gasket and multi-purpose adhesive/sealant.
• room temperature curing silicone rubber.

Silicone Spray Lubricant

• keeps the door and window weatherstrip pliable and soft.
• makes the door easier to close.
• retards weatherstrip squeaks.
• retards weatherstrip wear.
• helps retain door window alignment by reducing friction between the glass frame and the rubber weatherstrip.
• should not be used prior to painting.

Trim and Weatherstrip Adhesive

• quick drying, strong adhesive designed to hold weatherstripping onto all body panels and surrounding metal.