This is the original BMC workshop tool for locking the camshafts on the Twin Cam engine while adjusting timing chain sprockets for proper cam timing. Factory part number 18G551. Camshaft locking tool in use Cam lock key slots in cam and front bearing cap.
This is the original BMC workshop tool for locking the camshafts on the Twin Cam engine while adjusting timing chain sprockets for proper cam timing. 
