So I just did the headgasket on my 2.5l Dohc and am now trying to time it. My issue is that I have all the marks lined up like they should be, including disregarding the TDC on this and instead going by the crank marks, and I get a hard stop after about 270 degrees of rotation. This hard stop is both when i turn clockwise and counter clock wise. The crank spins fine when I unload the valves and check it, and the cams spin fine when i set the crank to the halfway piston position. Anyone have any suggestion on where to look next? Is it possible I have the intake and exhaust cams swapped? Is there anyway to check?