Hello. You can remove the hose and carefully scrape the fittings clean, then apply a small amount of gasket sealer to the fittings to assure a tight seal with your new hose. Apply sealer to the fitting only this will help avoid any excess from possibly clogging the hose or a water channel in the block. Thanks.. _________________________________________________ Have a look at: threaded inserts for plastic | cinch straps
Hello.. I think, you can get these part numbers from Nissan dealer. They give you full details about them.. Thanks.. ______________________________________ Have a look at: cinch straps | plastic grommet