PAI Industries 131858 Oil Pan Gasket Cummins 6C / ISC / ISL

Introduction

The PAI Industries 131858 is a premium aftermarket oil pan gasket designed for Cummins 6C, ISC, and ISL series diesel engines. This gasket provides a reliable seal between the oil pan and engine block, preventing oil leaks and maintaining proper lubrication system integrity. It is a direct replacement for Cummins OEM part number 3931967.

Signs You Need a New Oil Pan Gasket

• Visible oil seepage or dripping around the oil pan mating surface
• Oil spots on the ground beneath the engine after the truck has been parked
• Low oil level warnings despite no internal consumption issues
• Oil residue buildup on the bottom of the engine block or oil pan
• Burning oil smell from oil contacting hot exhaust components

Specifications

Cross References

This part replaces or is equivalent to the following part numbers:

• Cummins: 3931967
• PAI Industries: 131858, CUP131858

Applications

This oil pan gasket fits Cummins 6C, ISC, and ISL engines found in:

• Freightliner M2 Business Class, FL Series
• Kenworth T270, T370, T300
• Peterbilt 325, 330, 337, 348, 385
• International 4000 Series, DuraStar
• Autocar
• Blue Bird, Thomas Built, and IC Bus school buses
• Spartan, Pierce, and E-One fire apparatus chassis

Verify your engine serial number and configuration before ordering to confirm fitment.