I WAS GOING TO ADJUST THE VALVE FOR MY 88 735i W 166K MILES WHEN TO MY DISMAY AND HORROR I FOUND TWO BROKEN ROCKER ARMS. THE FIRST CYLINDER BEHIND THE TIMING CHAIN. CAN IT BE FIXED AND HOW/WHAT DO I DO TO FIX IT MYSELF. ANY LINKS OR INFO ON WHAT TO DO THANK YOU. ALSO WHAT WOULD CAUSE THIS? I CHANGE THE OIL REGULARLY WITH CASTROL FULL SYN 5W-50W. I AM JUST IN SHOCK WOULD IT BE BETTER TO GET A NEW HEAD OR ENGINE OR WHAT???? ANY IDEAS WELCOMED.