Originally Posted by tipomac
Well, I think I figured this out. If TDC is when cylinder 1 is at compression stage top dead center than 360 +10 degree after TDC the intake valves of cylinder number 1 should begin opening and if this is the case then timing should be correct I hope.
You failed to mention which engine...some big differences between em, especially how timing is set.
If all cam and belt pulley timing marks are correct and at the correct TDC (2 TDC's per cam revs), the precise intake cam timing should be irrelevant...a built-in (preset) relationship between the timing marks and the exact cam lobe position (for best performance and smoothness).