Where are the timing marks on a 1991 F-150 4.9L and what do they look like?
Looking at the engine from the front of the vehicle, find the
crankshaft pulley, it should be below the fan pulley (toward the
ground). There is a small mark on the crankshaft pulley. Also
mounted on the engine the is a piece of metal that looks like teeth
kinda looks something like this - ---vvvvvvvvvv/\vvv--- Those are
your timing marks. Each tooth is one degree and the larger concave
space is TDC of the compression stroke for the #1 cylinder