Distributor is a crucial electrical component in an old car’s ignition system. The ignition distributor is driven by a gear on the camshaft and controls your engine's ignition timing. It also drives your engine's oil pump via an intermediate shaft. The distributor handles several jobs. Its first and foremost responsibility job is to distribute the high voltage from the ignition coil to the spark plug of the correct cylinder in the correct firing order via the cap and rotating rotor.
The distributor cap and rotor begin to wear down over time from spinning and passing the electric charge to the cylinders. May cause all sorts of engine problems such as engine misfiring and stalling. Please replacing the cap and rotor at the same time every 50,000 miles, regardless of whether or not they are damaged. If your vehicle does not put on a lot of miles every year, it's also a good idea to replace them every three years.
Suggestion: If you're removing and replacing a distributor, mark the position of the distributor relative to the engine and the rotor relative to the distributor before removing it. Apply some assembly lube or fresh motor oil to the distributor gear to prevent unnecessary wear when you first start the engine.