I have a 2006 Chev Cobalt 2.2L Ecotech....When I set the Timing on it 10 Exhaust..2 Intake...5 crank....How many revolutions will that engine make before the timing marks come up again..... at 10...2...5. Is it 4 complete revolutions of the Engine Then the timing marks come back to where I set Them. I set timing marks where the book calls for but turned engine by hand and markes never where I 1st set them.....What the Hell !