put that intake cam in the head clean and lube set the lazer mark level with the head at 40 degrees, put the two holdown tabs on the cam, then the exhaust then the tensioner, do not rotate with the valve cover off, if you want to check you can install most of the vc bolts and test by rotating 360 twice and pulling valve cover and checking that your marks lazer marks are level with the head,or make new paint marks at the adjuster to front of the engine but I would use the laser marks, remember don't confuse 53 degree check that's only used to check adjusters thru the cam sensors holes in the valve cover , you add17mm to 40 degree mark , because some motors don not have a 53 mark, they stop at 40, so you add a strip of tape 17mm to the 40 that's your 53 mark, at the 53 degree mark timing is checked thru cam sensor holes