The Ford F81Z-6026-CA is a genuine OEM engine valley expansion freeze plug for 1994–2003 7.3 Powerstroke engine blocks. It seals the machined coolant jacket access port located deep in the engine block valley beneath the turbo pedestal and fuel filter bowl. Ford manufacturers this factory steel cup plug to strict OEM tolerances to deliver a reliable, long-lasting press-fit seal inside the cast iron block.

Coolant pooling in the engine valley, unexplained coolant loss, or rust perforation of the original factory steel plug is what this part addresses. Because road salt, engine heat, and trapped oil or fuel settle into the engine valley, the stock plug frequently corrodes over time and develops hairline pinhole leaks that drain down the rear engine cover. It is the replacement valley freeze plug only.

It fits 1994–2003 7.3 Powerstroke engines across Ford F-Series trucks, Excursions, and E-Series vans.

Fitment

• 1994–1997 Ford F-250 / F-350 7.3L Powerstroke (OBS)
• 1999–2003 Ford F-250 / F-350 / F-450 / F-550 Super Duty 7.3L Powerstroke
• 2000–2003 Ford Excursion 7.3L Powerstroke
• 1995–2003 Ford E-Series Vans 7.3L Powerstroke
• Direct fit for engine valley coolant port
• Genuine OEM Ford replacement
• Expansion cup plug only

Thoroughly scrape, degrease, and clean the engine valley block bore to bare metal before driving the new plug home. Apply a thin coating of high-temperature sleeve retainer or thread sealant to the outer diameter of the plug for an optimal seal. Drive the plug evenly using an appropriate driver or socket that matches the inside cup diameter so the lip is not warped or deformed during installation.