One Quarter Inch Hex Oil Pump Primer For Rebuilt Engines First Start Lubrication Tool Fits Three Eighth Inch Drive Drill Quick Prime Before Startup Engine Break In Prep Gear For Smooth Running And Longevity

1/4 Hex Oil Pump Primer for Rebuilt Engines Pack
✔️ 1/4 in hex drive, primes oil pump with 3/8 in drill ready

This 1/4 inch hex oil pump primer primes oil passages in rebuilt engines before the first startup. It attaches to the oil pump shaft and works with a standard 3/8 inch drill (9.53 mm) for fast break-in prep. Ideal for Ford-style builds and other engines using this shaft geometry. Pack of 1.

✅ 1/4 in hex drive connects to oil pump shaft via distributor hole (6.35 mm)
✅ Works with any 3/8 in reversible drill for easy priming (9.53 mm)
✅ Fills oil passages fast to protect bearings and new parts
✅ Ideal for pro mechanics during engine break-in prep

💡 What is an oil pump primer used for in a rebuilt engine and why is it handy during break-in? It pre-lubricates all passages before first startup to prevent dry starts. - engine break-in lubrication - dry-start prevention during initial startup - quick priming with 1/4 in hex drive - compatible with 3/8 in drills