Oil Pump Primer Ford 260-351W 1/4in Hex

The Oil Pump Primer Ford 260-351W 1/4in Hex is an essential pre-oiling tool designed for engine builders and mechanics performing complete engine assembly or rebuilds on Ford 260, 289, and 351W V8 engines. Proper oil circulation through the pump, galleries, and bearing surfaces is critical before firing a freshly assembled or rebuilt engine. This primer eliminates dry-start conditions that can cause catastrophic bearing damage within seconds of ignition.

This PROFORM primer features a 1/4-inch hex drive, allowing it to mate directly with your engine's oil pump shaft—a standard interface on Ford small-block and mid-block platforms. The tool accepts any quarter-inch hex bit or ratchet, enabling you to manually rotate the pump without starting the engine, circulating fresh oil throughout the entire system, cylinder walls, valve lifters, and rocker arms. By priming the oil system this way, you verify proper pump operation and confirm oil distribution.

Mechanics performing engine rebuilds, vintage car restorations, or performance modifications should always prime their oil system before the first crank. This compact, lightweight tool (0.58 lbs) fits easily in your toolbox and works alongside your preferred oil pressure gauge setup. Ensure your oil system is fully charged before combustion ignition occurs to protect critical engine components.