Chrysler Oil Pan Gasket

The Chrysler Oil Pan Gasket (MR. GASKET MPN 397) is a precision fiber-composite replacement seal designed for Mopar B-Series and RB-Series engines, including the legendary 426 Hemi platform. This gasket serves as the critical seal between the engine block and oil pan, preventing oil leaks that can lead to catastrophic engine damage. Whether you're rebuilding a classic Mopar muscle car, performing routine maintenance, or restoring a high-performance big-block, a properly seated oil pan gasket is non-negotiable for engine longevity and reliability.

This multi-piece gasket kit features a 0.062-inch thick fiber composite construction, engineered to maintain a watertight seal under varying engine temperatures and oil pressures. The fiber material provides superior compressibility and durability compared to cork alternatives, resisting oil degradation and thermal cycling that plague older sealing designs. The multi-piece configuration allows for precise fitment around oil pan bolt holes and block geometry, reducing the risk of incomplete sealing or blow-out during high-rpm operation—critical when dealing with Hemi engines that demand absolute reliability.

Mechanics and enthusiasts restoring Chrysler B/RB-Series platforms trust MR. GASKET's OEM-equivalent specifications for both street and strip applications. Installation requires oil pan removal and thorough block surface cleaning; a fresh gasket prevents seepage that could contaminate spark plugs or invite debris into the sump. This kit is essential for anyone replacing an oil pan, performing a complete engine gasket set overhaul, or addressing persistent oil leaks on vintage Mopar engines. Proper installation with recommended gasket sealer ensures a seal rated for stock and moderately modified engines alike.