I completed a valve adjustment last night. As I was putting it all back together, ensuring I was at TDC and my cams were correctly positioned, I placed the cam chain tensioner on and it push my alignment out. I was in the correct position prior to placing the chain tensioner on. What am I missing? It was barely off. The TDC tick on the crank would just be off to the left of the top mark, or my cam shafts dot marks were just above or below the top of the head.
I placed the exhaust camshaft on first and made sure the crank was at TDC and the chain was tight. Then I placed the intake camshaft on and aligned it correctly with the marks. At that point, all my marks are in the correct position but when I placed that tensioner on, it would shift just slightly and they would not all be positioned correctly.