No sealant necessary, start with exhaust cam drivers side , set to tdc, ot mark, put that cam in as close as possible to holes in cam holdown brackets at front, there should be no slack on cam to crank run, if your off too far remove and reset cam the idea is to get it lined up to the mark exactly when the cam is finally tightened, use plenty of lube on the cam surfaces or assembly lube if you have some, next the intake cam, the adjuster gets turned all the way to the right if it moves then install to the chain, the of course intake cam on passenger side then exhaust , when you finally get all the 4 cams right it may help to wedge the tensioner rail at passenger side slightely so the tensioner will go in the two bolts