Removal Of Liquid Gasket Sealing

WARNING: This page is about a different car, the 2003 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.

After removing the mounting bolts and nuts, disconnect the component using a seal cutter.
CAUTION: Be careful not to damage the mating surfaces.
In areas where the cutter is difficult to use, use a plastic hammer to lightly tap the areas where the sealant is applied to disconnect the component.
CAUTION: If for some unavoidable reason a tool such as a flat-bladed screwdriver is used, be careful not to damage the mating surfaces.

Fig 1: Removal Of Liquid Gasket With Cutter
Courtesy of NISSAN MOTOR CO., U.S.A.