Dieselsite Billet 7.3L Thermostat Housing - 1999-2003 Ford F-Series

Dieselsite Billet Thermostat Housing – 7.3L Powerstroke (1999–2003)

If you’ve ever replaced a thermostat on a 7.3L Powerstroke, you already know how bad the factory thermostat housing is. The OEM stamped-steel housing is thin, rust-prone, and notorious for warping and leaking after removal. Ford even considers it a single-use “disposable” part.

The Dieselsite Billet Thermostat Housing solves all of those problems with a precision-machined billet aluminum design that seals properly, resists corrosion, and can be reused over and over again.

🔥 Why Upgrade to the Dieselsite Billet Housing:

• Billet Aluminum Construction – No rust, no warping, no leaks

• Reusable Design – Unlike the OEM housing, this is NOT disposable

• Improved Sealing Surface – Eliminates common thermostat leaks

• Cleaner Engine Bay Appearance – Looks as good as it performs

🛠️ What’s Included:

• Billet thermostat housing

• New gasket included

• Replacement mounting bolts included

⚠️ Installation Notes:

• Maximum bolt torque: 100 in-lbs

• Do NOT exceed torque specification

🚗 Fitment:

• 1999–2003 Ford 7.3L Powerstroke

• Fits 1999–2003 Super Duty

• Fits some 2002–2003 E-Series vans

  • ⚠️ Older E-Series vans use a different style — verify before ordering

📌 OBS Owners:
If you’re looking for this housing for an OBS (94–97) truck, see the related items below for the correct version.

If you’re tired of coolant leaks, warped flanges, and replacing disposable factory housings, the Dieselsite Billet Thermostat Housing is a permanent fix you’ll only install once.