Gear Cover Gasket Cummins 3906612 | 3917780, 3913431, 3911648

Reliable Sealing for Heavy-Duty Cummins Engines

The Gear Cover Gasket 3906612 is engineered to provide a dependable, leak-proof seal between the engine block and the front gear housing cover. Over time, heat and vibration can degrade gaskets, leading to oil leaks that compromise engine performance and cleanliness. This premium replacement gasket is manufactured from high-grade materials to withstand extreme operating temperatures and pressures, ensuring long-lasting durability in demanding applications.

Key Features & Benefits

• Perfect Fitment: Designed specifically for Cummins QSL and ISL series engines (including 8.9L variants) to ensure a precise, hassle-free installation.
• Superior Leak Prevention: Seals the front gear cover tightly to prevent engine oil from escaping and contaminants from entering the timing assembly.
• Durable Construction: Made from robust, oil-resistant materials that resist degradation from heat, pressure, and engine fluids.
• Cost-Effective Maintenance: An essential component for timing gear repairs, front-end overhauls, or routine leak mitigation.

Engine Compatibility

This gear cover gasket is compatible with a wide range of heavy-duty Cummins engines, including:

• Cummins QSL 8.9 / QSL 9
• Cummins ISL 8.9 / ISL 9
• Cummins 6CT 8.3 / ISC / QSC (cross-referenced applications)