How soon should you change the timing belt on a 1989 Ford Ranger 2.3 engine?

Timing belts should be changed ever 60,000 miles. Also make sure you line up the camshaft pointer to the middle mark on the inner timing cover, have the engine crank at Top Dead Center on the COMPRESSION Stroke of the number one cylinder. If you don't you will be on the EXHAUST stroke and will have to turn the crankshaft one full turn (this is also known as being 180 degrees out of time) And lastly the auxillary shaft gear pointer should be at the "3 o'clock" position making the distributor rotor at the #1 pole on the distributor,