OK Gents, First off I suck at searching on any forum so I am sorry in advance (( 07 Xterra in question Owned and loved with extreme OCD since new )) 225K miles My truck until 3 years ago when I gave it to my daughter The truck has never had anyone touch it than me, except for the SMOD which Nissan took it hard for. LOL The truck has been awesome, it has gone & done everything I asked it to & owes me nothing It had an airbag light on (I cleared) & my daughter was complaining about it sliding out on her. Since I was getting ready to ship it out for this semester, I brought it in to the dealer to scan the ABS & airbag system (I cant do)& flush the brakes (didn't want to) lol All checked out good & brakes flushed YAY!! But they said it needed a chain job... I smelled BS but...225k... I got to listen to it Saturday Cold & Hot.. Long extension to the cover and 2 small covers on the cam gears. Idk. It doesn't sound as scary as most YouTube vids I watched. Actually sounds smooth... I have to do the valve covers & plugs and everything in the middle at this point, and was thinking of tearing the front off, but I was wondering if there is any room taking the cam gear covers off to send a scope in to see the secondary guides?? Or should I just go all in and do it all. Again the truck is & has been awesome in every way & is still in great shape, I would love to get another 12 years out of her.... MAYBE my daughter will give it back to me.. she says NEVER DAD!! ))) Thanks in advance for your wisdom.