Oil Cooler Kit for Ford F150 F250 F350 & E250 E350 (1984-1994) 6.9L 7.3L Diesel Engine

Heavy-Duty Aluminum Oil Cooler Kit for 1984-1994 Ford F-150, F-250, F-350, E-250, E-350 (6.9L/7.3L IDI)

COMPATIBLE WITH:
Ford F150 1984 (Just 1 Year)
F250 / F350 1984-1994

What It Does: Replaces the factory oil cooler core to maintain optimal engine oil viscosity and prevent the mixing of coolant and lubricant in high-mileage diesel engines.

The Stock 6.9L & 7.3L IDI Thermal Weakness

The International Harvester-sourced 6.9L and 7.3L IDI diesel engines found in OBS (Old Body Style) F-Series and Econoline vans rely on a header-and-bundle oil cooler design. Over decades of service, the OEM unit becomes a critical failure point. Internal corrosion and mineral scale buildup within the narrow passages restrict flow, leading to localized heat soak. More critically, the factory seals and O-rings are prone to degradation from repeated thermal cycling, resulting in catastrophic cross-contamination where engine oil enters the cooling system. This "milkshake" effect compromises both the lubrication of the bottom end and the heat dissipation capacity of the radiator, risking internal bearing failure and head gasket compromise under heavy towing loads.

The Engineering Solution

This replacement oil cooler is engineered to restore factory cooling efficiency with upgraded materials. Constructed from high-grade aluminum, the unit features a high-density 27-row cooling stack designed to maximize the surface area for thermal transfer between the oil and the surrounding coolant jacket. Unlike aged stock units, this core is manufactured to IATF16949 standards, ensuring precise fitment within the factory header housing. The kit includes four heavy-duty O-rings and two gaskets to provide a comprehensive seal, mitigating the risk of future leaks. By stabilizing oil temperatures during high-EGT (Exhaust Gas Temperature) scenarios, this cooler protects the piston cooling jets and ensures the 6.9/7.3 IDI block maintains its reputation for million-mile durability.

Technical Specifications

Compatibility

• Ford E-250 Econoline Club Wagon (1984-1987) V8 6.9L Diesel (With Gaskets)
• Ford E-250 Econoline Club Wagon (1988-1991) V8 7.3L Diesel (With Gaskets)
• Ford E-350 Econoline (1984-1987) V8 6.9L Diesel (With Gaskets)
• Ford E-350 Econoline (1988-1994) V8 7.3L Diesel (With Gaskets)
• Ford E-350 Econoline Club Wagon (1984-1987) V8 6.9L Diesel (With Gaskets)
• Ford E-350 Econoline Club Wagon (1988-1994) V8 7.3L Diesel (With Gaskets)
• Ford F Super Duty (1988-1994) V8 7.3L Diesel (With Gaskets)
• Ford F-150 (1984) V8 6.9L Diesel (With Gaskets)
• Ford F-250 (1984-1987) V8 6.9L Diesel (With Gaskets)
• Ford F-250 (1988-1994) V8 7.3L Diesel (With Gaskets)
• Ford F-350 (1984-1987) V8 6.9L Diesel (With Gaskets)
• Ford F-350 (1988-1994) V8 7.3L Diesel (With Gaskets)

The Ford Heavy-Duty Standard

For the OBS Ford owner, reliability is non-negotiable. Whether you are hauling heavy equipment or maintaining a classic workhorse, this oil cooler kit provides the cooling overhead necessary for high-duty cycles. Built for the rigors of towing and long-haul transport, it ensures your IDI diesel engine remains protected against the thermal stresses that plague older cooling systems.