The manual way is to remove the valve cover and look at number four cylinder. It has to be on valve overlap which means the intake and exhaust are open at the same time the exact amount of lift. You can use a level on the lobes to verify.
You should be able to look at these diagrams so you can see where the marks are (below)
Please let us know if you need anything else to get the problem fixed.
Images (Click to enlarge)
Saturday, October 21st, 2017 AT 2:54 PM