When i was under my Xterra checking Skid plate bolts, i notice that i had a bolt that looked loose, just above the skid plate

up on closer inspection i figured out that it was a engine mount that had 1 bolt loose ( passenger side, just behind the tire )

i put some blue lock tie on the bolt, and put the nut back, and forgot about it

I had my first oil change in my Altima, i asked my mechanic to check underneath to see if everything where its suppose to be , he checked and sad "what the hell is this"
He pointed out to a bolt with the nut hanging by the last threads ( ENGINE MOUNT )

Maybe thats where all these blown engine mounts are comming from ? Maybe nissan just forgets to tighen it to the right specks ?

( it took 2 mechanics, and a breaker bar to take off my oil filter ) specks ? whats specks