Where are the timing marks on a 2003 Ford F-250?

On a 2003 Ford F-250 with a 6.0L Power Stroke diesel engine, the timing marks are located on the crankshaft damper and the timing cover. The damper typically has a notch or line that aligns with a corresponding mark on the timing cover. For the 5.4L gas engine, the timing marks can be found on the crankshaft pulley and the timing chain cover. Always consult the vehicle’s service manual for precise locations and specifications.