Fel-Pro 35812 Engine Water Pump O-Ring
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Fel-Pro

Fel-Pro 35812 Engine Water Pump O-Ring

Brand Fel-Pro 35812
Fits Ford · 22 vehicles

Application-specific materials. Engineered for reliable sealing performance and durability.

Premium grade. Professional-grade sealing solution for dependable service.

Water pump O-ring. A sealing component for the cooling system.

Cross-references MAHLE K31802, MAHLE K31803 and 4C3Z8507AA for the same application. See all 3.

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Engine Water Pump O-Ring for Ford Super Duty

Fel-Pro 35812 is a premium engine water pump O-ring built for sealing performance in Ford truck and van cooling system service. It uses application-specific materials to help deliver a precise seal where the water pump meets the engine, supporting dependable coolant containment on the vehicles listed below.

Key Features

  • Premium-grade engine water pump O-ring
  • Black sealing ring construction
  • Application-specific material selection for vehicle sealing
  • 3.984 in inside diameter x 4.262 in outside diameter
  • Direct fit for select Ford E-350 Super Duty, F-250 Super Duty, F-350 Super Duty, Excursion, and E-350 Club Wagon applications

Detailed Description

Fel-Pro 35812 is an engine water pump O-ring for cooling system sealing on select Ford applications. Fel-Pro gaskets are engineered for vehicle-specific sealing needs, and this premium O-ring is sized for the listed fitments to help maintain a secure seal at the water pump interface. This part cross-references Ford 4C3Z8507AA for the same application.

Compatible With 2005-2010 Ford E-350 Super Duty, N/A; 2005-2007 Ford F-250 Super Duty, N/A; 2005-2007 Ford F-350 Super Duty, N/A; 2005 Ford E-350 Club Wagon, N/A; 2005 Ford Excursion, N/A; 2004 Ford E-350 Club Wagon, N/A; 2004 Ford E-350 Super Duty, N/A; 2003-2004 Ford Excursion, N/A; 2003-2004 Ford F-250 Super Duty, N/A; and 2003-2004 Ford F-350 Super Duty, N/A.

What It Helps Address

  • Coolant seepage at the water pump sealing surface
  • Loss of seal integrity during water pump service
  • Leak-related cooling system maintenance on Ford Super Duty and Excursion applications
  • Improper sealing from a worn or flattened O-ring
  • Fitment issues when replacing the original water pump seal

Installation Notes and Tips

Verify the inside diameter and outside diameter before installation: 3.984 in ID and 4.262 in OD. Clean the sealing surfaces thoroughly, inspect the water pump and mating surfaces for damage, and install the O-ring evenly to avoid twisting or pinching. Confirm vehicle application by year, make, and model before service.

Quality Assurance

Fel-Pro is known for application-specific sealing solutions used in professional engine repair. Part number 35812 is built as a premium sealing component for the listed Ford cooling system applications.

This part fits 22 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2010FordE-350 Super Duty6.0LV8N/A3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2009FordE-350 Super Duty6.0LV8N/A3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2008FordE-350 Super Duty6.0LV8N/A3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2007FordE-350 Super Duty6.0LV8N/A3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2007FordF-250 Super Duty6.0LV8N/A3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2007FordF-350 Super Duty6.0LV8N/A3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2006FordE-350 Super Duty6.0LV8N/A3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2006FordF-250 Super Duty6.0LV8N/A3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2006FordF-350 Super Duty6.0LV8N/A3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2005FordE-350 Club Wagon6.0LV8N/A3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2005FordE-350 Super Duty6.0LV8N/A3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2005FordExcursion6.0LV8N/A3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2005FordF-250 Super Duty6.0LV8N/A3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2005FordF-350 Super Duty6.0LV8N/A3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2004FordE-350 Club Wagon6.0LV8N/AFrom 09/22/2003; 3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2004FordE-350 Super Duty6.0LV8N/AFrom 09/22/2003; 3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2004FordExcursion6.0LV8N/AFrom 09/22/2003; 3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2004FordF-250 Super Duty6.0LV8N/AFrom 09/22/2003; 3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2004FordF-350 Super Duty6.0LV8N/AFrom 09/22/2003; 3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2003FordExcursion——N/AFrom 09/22/2003; 3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2003FordF-250 Super Duty——N/AFrom 09/22/2003; 3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
2003FordF-350 Super Duty——N/AFrom 09/22/2003; 3.984 (in) Inside Diameter x 4.262 (in) Outside Diameter
Directly replaces or cross-references 3 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
MAHLE — K31802MAHLE — K318034C3Z8507AA