WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.
After removing the bolts and nuts, separate the mating surface and remove the old liquid gasket using Tool.
Courtesy of NISSAN NORTH AMERICA, INC.
Tool number
: KV10111100 (J-37228)
Tap the seal cutter to insert it (1).
In areas where the Tool is difficult to use, lightly tap to slide it (2).