Can anyone direct me to a manual, or google search, or YouTube, or XXXX that can explain how to change out a manifold on a 2008 QX56? I have a ticking noise when I first start my rig, but it goes away shortly thereafter. Mechanic tells me it's either a cracked manifold or bad gasket on drivers' side. I suspect gasket since the ticking goes away once vehicle is warmed up (expanding the gasket). Either way, I want to look at it myself, and change out the manifold and/or the gasket. Any help is appreciated!