Product Description
Stop coolant seepage fast with the MAHLE K31803 molded-rubber water pump gasket for mid-cycle 6.0L Power Stroke (2004.5–2007). This OE-style O-ring seals the pump to the front cover for a leak-free install after service or replacement—perfect for daily drivers, tow rigs, and work trucks.
Fitment
- 2004.5–2007 Ford Super Duty F-250/F-350/F-450/F-550 — 6.0L Power Stroke diesel
- Mid-2004 “late build” trucks with 100 mm water pump (verify build date/pump size)
Cross-Reference / Related Mahle on CPP Diesel
- MAHLE K31802 Water Pump Gasket (90 mm pump, 2003–2004)
- MAHLE 54450A Head Gasket (18 mm)
- MAHLE 54579A Head Gasket (20 mm)
- MAHLE JV5066 Timing Cover Gasket Set (03–07 6.0L)
Notes
Clean the pump groove and front cover thoroughly. Most molded O-rings install dry—lightly lubricate with coolant and follow Ford torque specs.
FAQ
WILL THIS FIT MY 2004 6.0L?
Yes, if it’s a late-build 2004.5 with the 100 mm pump. Early 2004 (90 mm) uses the MAHLE K31802.
IS THIS AN O-RING OR PAPER GASKET?
It’s a molded-rubber O-ring that seals the water pump to the front cover.
DO I NEED SEALANT?
Generally no. Install clean and dry (light coolant lube only) and torque to spec.
Specifications for Mahle K31803
| Attribute | Value |
|---|---|
| Brand | MAHLE |
| Part Number | K31803 |
| Application | Water pump to front cover seal (100 mm pump), 2004.5–2007 Ford 6.0L Power Stroke |
| Material | OE-style molded rubber |
| UPC | 027067652843 |
| GTIN | 027067652843 |
| Shipping | Calculated at checkout; optional shipping insurance available |
| Prop 65 | This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Learn more |
