Where is the timing mark on camshaft gear for 1999 Ford Ranger 25L 4-cylinder?

There isn't a single, universally marked "timing mark" on the camshaft gear of a 1999 Ford Ranger 2.5L 4-cylinder engine in the same way some engines have a prominent mark. Instead, the timing is determined by the relative position of the camshaft gear and crankshaft gear (or the crankshaft pulley with its timing mark).

You'll need to consult a repair manual specific to your 1999 Ford Ranger 2.5L engine. The manual will show you:

* The mark on the crankshaft pulley: This is usually the most prominent timing mark.

* The alignment of the camshaft gear teeth (or a specific tooth) relative to the crankshaft gear: The manual will indicate which tooth on the camshaft gear must align with a particular reference point, often a mark on the timing cover or a specific crankshaft pulley position.

Without a repair manual, attempting to time this engine is highly risky and could result in serious engine damage. The procedure is precise and requires the correct alignment of several components.

You can find repair manuals online (like at Haynes or Chilton) or at auto parts stores. Using a factory service manual is ideal. The manual will contain detailed diagrams and instructions crucial for accurate timing.