The special tool is installed to lock timing components in position while the timing chain system is serviced. Camshaft removal and installation. Remove camshaft sprocket or timing components. OEM Mopar 8350, Miller 8350, 4.7L locking tool, RAM 1500 4.7 timing tool, Dodge Dakota 4.7 engine tool, Jeep 4.7 timing locking tool, Mopar cam locking tool, 4.7L timing service tool, dealer engine tool, Made in USA Mopar tool.