ISX Oil Pan Gasket

The FP Diesel 4026684 gasket is built for Cummins ISX/ISX15 oil pan service where a tight, leak-free seal is critical. A worn pan gasket can cause oil seepage, messy engine bays, and gradual oil loss. This aftermarket gasket matches OEM shape and compression characteristics, providing even sealing under vibration and heat cycling. It’s ideal for pan replacement, in-frame work, or preventive maintenance to keep your ISX running clean and protected.

FP DIESEL Part No: 4026684

$210.58

Specifications

FP Diesel part 4026684 is an oil pan gasket designed for Cummins 15L ISX-family engines, including ISX15, QSX15, and later X15 applications. The gasket seals the full perimeter of the oil pan flange, preventing leaks that can lower oil level and reduce cooling/lubrication performance. Cummins identifies 4026684 as primarily used on EPA13 15-liter ISX/QSX platforms, and multiple heavy-duty catalogs list it as a direct replacement for ISX/ISX15/X15 oil pan sealing. Replace whenever the pan is removed to ensure proper torque retention and long-term leak protection.

Weight

4.18

Compatibility

Freightliner Cascadia — ~2013–present
Kenworth T680 / W900 — ~2013–present
Peterbilt 579 / 389 — ~2013–present
International LT / ProStar — ~2013–present
Volvo VNL — ~2013–present