OTC Crankshaft Positioning Tool for use on 1993 and newer Ford 4.2L V6; 4.6L 2 valve and 4.6L 4-valve V8, 5.4L V8, and 6.8L V10 engines. Handy tool prevents accidental movement of the crankshaft when doing camshaft or timing chain service or installation on these 'interference' engines. Preventing timing misalignment on these 'interference' design Ford engines is critical as valves will contact pistons if the timing chain is installed in an incorrect position, resulting in severe damage. Simply install crankshaft positioning tool over crankshaft snout (aligning crankshaft woodruff key with keyway on tool) and engine front cover alignment dowel to correctly position crank at TDC. OTC recommends (but does not require) that the No. 6024 Crankshaft Alignment Tool be used with Nos. 6009 and 6020 Camshaft alignment tools to safeguard alignment when servicing cams or chains. Tool is same as Ford No. 303-448. Value is at the core of the OTC tool and equipment portfolio. For a simple repair or the most complex drivability concern, these award-winning tools universally solve problems faster, and at better value, than any other product line available. Whether it's a specialty tool or unique piece of service equipment, OTC provides top solutions to modern automotive service challenges while increasing technicians' productivity and shop profits.