Engineered specifically for late 2004 through 2007 Ford F-250, F-350, F-450, F-550 Super Duty and Excursion trucks equipped with the 6.0L Powerstroke diesel engine, the Genuine Ford EGR Cooler Inlet Coolant Hose (4C4Z-8592-AA) bridges the connection between the engine oil cooler water outlet and the EGR cooler inlet. Over time, high under-hood operating temperatures, constant thermal expansion, and oil contamination cause factory rubber and silicone hoses to soften, swell, or develop pinhole leaks at the quick-connect fittings, resulting in unexpected coolant loss and localized overheating.

As an authentic Ford original equipment part, the 4C4Z-8592-AA hose matches exact factory length, inner diameter, and bend angles to eliminate the kinking or premature tension stress common with generic straight-cut rubber hose replacements. Equipped with pre-installed internal O-rings, this blue coolant bypass tube ensures an immediate, watertight seal upon installation.

Key Features & Benefits

• Genuine Ford OEM Component: Designed by Ford Motor Company to guarantee exact material compound longevity, burst strength, and shape retention.
• High-Temperature Reinforced Silicone: Formulated to resist continuous engine bay heat cycles and degradation from glycol-based coolants.
• Pre-Installed Sealing O-Rings: Comes equipped with factory O-rings inside the fittings to ensure a positive, leak-free connection out of the box.
• Exact Factory Routing: Pre-formed geometry eliminates pinching, sharp bends, or restriction of coolant flow to the EGR cooler.
• Direct Drop-In Replacement: Matches OEM quick-disconnect interface dimensions for a fast, hassle-free under-hood installation.

Technical Specifications

• Manufacturer Part Number / SKU: 4C4Z-8592-AA / 4C4Z8592AA (Ford Base Part # 8592)
• Superseded / Interchanged Numbers: International / Navistar 1837845C2
• Truck Platform: Late 2004–2007 Ford F-250, F-350, F-450, F-550 Super Duty & Ford Excursion
• Engine Platform: 6.0L 32-Valve Powerstroke V8 Turbo Diesel (Square EGR Cooler Applications)
• Material Composition: Heavy-Duty Reinforced Silicone with Internal O-Rings
• Core Requirement: None (Brand New Genuine Ford Part - No Core Return Required)
• Warranty: Ford Motor Company Factory Parts Warranty

Vehicle Fitment & Installation Notes

• Late 2004–2007 Ford F-250 / F-350 / F-450 / F-550 Super Duty – 6.0L Powerstroke Diesel
• Late 2004–2005 Ford Excursion – 6.0L Powerstroke Diesel
• Fits Model Years: Late 2004, 2005, 2006, 2007
• Fitment Notice: Engineered strictly for late 2004–2007 models equipped with the square-style EGR cooler. Does not fit early 2003 to mid-2004 trucks featuring the round-style cooler layout. Always verify your existing coolant tube routing before ordering.
• Installation Tip: Ensure the cooling system is completely depressurized and cool before disconnecting the line. Clean any mineral scale or debris from the oil cooler water outlet nipple and lightly lubricate the new O-rings with clean coolant to prevent binding during push-on connection.