The Ford MC3Z-8592-A is the genuine thermostat housing, which Ford catalogs as the water outlet connection, for 1994-1997 7.3L OBS Powerstroke trucks. It caps the thermostat and connects to the upper radiator hose.

Ford now supplies MC3Z-8592-A in place of the original F4TZ-8592-AA. A corroded or pitted housing is a common source of coolant seepage, so it is worth replacing during a thermostat change.

• Genuine Ford Part: Built to the original Ford specification.
• Current Ford Number: Replaces the original F4TZ-8592-AA.
• Seals The Thermostat: Fresh sealing face for a leak-free fit.
• Upper Hose Connection: Factory neck size for the stock upper hose.
• Direct Replacement: Bolts on with the factory hardware.

Technical Specifications

• Part Number: MC3Z-8592-A
• Manufacturer: Ford Motorcraft
• Ford Description: Connection, water outlet (thermostat housing); replaces F4TZ-8592-AA
• Warranty: 12 months / 12,000 miles (Ford)

Vehicle Fitment & Technical Installation Notes

• Fitment: 1994-1997 Ford F-350 and 1994-1996 F-250 with the 7.3L Powerstroke, plus the 1997 F-250 HD.
• Installation Tip: Clean both sealing faces down to bare metal, use a new thermostat gasket, and torque the housing bolts evenly. Refill and bleed the cooling system, then check the housing for seepage once the engine is warm.