Cummins QSC Parts – Gasket Section

The Cummins QSC engine is a highly reliable power platform, widely used in both marine and industrial applications. To maintain performance, it’s essential to use precision-fit gaskets and seals designed specifically for the QSC. At Diesel Pro Power, we provide a complete selection of Cummins QSC gaskets, ensuring a perfect seal for every component.

Below you’ll find our QSC gasket catalog, covering everything from marine water pump seals to full upper and lower gasket sets.

Gaskets for Cummins QSC Cooling System

Cummins Gasket to Mount the Marine Water Pump

This mounting gasket provides a tight seal between the raw water pump and the engine housing. Preventing leaks at this critical junction is essential for maintaining proper cooling flow and avoiding premature pump wear.

• Designed for direct installation on Cummins QSC raw water pumps

• Maintains reliable sealing under constant exposure to water and coolant

• Durable construction for long service life

Cummins Marine Water Pump O-Ring

Each Cummins QSC engine requires two water pump O-rings to seal the inlet and outlet ports. These O-rings prevent coolant or seawater leaks, protecting both the pump and surrounding components.

• Two per engine are required

• Precision-engineered for QSC water pump fitment

• Resistant to heat and corrosion for marine use

Cummins Heat Exchanger Gasket – QSC

The heat exchanger gasket seals the connection between the exchanger body and its cover, keeping coolant contained and preventing external leaks. Proper sealing ensures the QSC engine maintains stable operating temperatures.

• 5” diameter fit for Cummins QSC heat exchangers

• Manufactured for durability in high-pressure cooling systems

QSC Engine Upper & Lower Gasket Sets

Cummins Upper Gasket Set – QSC

The upper gasket set includes all seals required for the top-end rebuild of the Cummins QSC engine. This ensures proper sealing of cylinder heads, intake, exhaust, and valve components.

• Compatible with QSC engines using CM554 or CM850 electronic controls

• Includes all necessary upper gaskets for head and valve system service

• High-quality materials prevent oil, coolant, and combustion gas leaks

Cummins Lower Gasket Set – QSC

The lower gasket set provides the seals required for the bottom-end service of the QSC engine, including the oil pan, gear housing, and other lower block components.

• Specifically designed for Cummins QSC engines with CM850 control modules

• Ensures long-lasting protection against oil and coolant leaks

• Essential for complete rebuilds and overhauls

Additional QSC Gaskets

Cummins Exhaust Manifold Outlet Connection Gasket – QSC

Seals the exhaust outlet connection on the QSC manifold to ensure no gas leakage and maintain proper back pressure.

• Heavy-duty construction for high-temperature environments

• Designed to withstand repeated heating and cooling cycles

Cummins Gear Housing Gasket – QSC

The gear housing gasket seals the timing gear cover, preventing oil seepage while keeping contaminants out of the gear system.

• Fits Cummins QSC timing gear housing precisely

• Built for long service life and oil-tight operation

Cummins Intake Manifold Cover Gasket – QSC

The intake manifold cover gasket seals the intake plenum, maintaining optimal air delivery to the combustion chambers.

• Ensures airtight intake system performance

• Prevents dirt and unmetered air from entering the engine

Cummins Intake Connection Gasket – QSC

This gasket provides a reliable seal at the intake connections, ensuring smooth airflow to the engine without leaks.

• Built to match Cummins QSC intake geometry

• Resistant to heat, vibration, and fuel vapors

Cummins Fuel Transfer Pump Gasket – QSC

Each QSC fuel transfer pump requires two gaskets to prevent leaks at the mounting surface.

• Ensures leak-free diesel delivery to the fuel system

• Maintains consistent injection pressure and fuel efficiency

Cummins Oil Cooler Cover Gasket – QSC

The oil cooler cover gasket prevents leaks at the oil cooler housing, maintaining stable lubrication under high engine loads.

• Available in standard and inner gasket styles for complete sealing

• Essential for protecting engine bearings and moving components

Cummins Rear Cover Gasket – QSC

The rear cover gasket seals the back plate of the QSC engine, preventing oil leaks and ensuring crankcase integrity.

• Heavy-duty design for long-term durability

• Critical for maintaining proper oil circulation

Cummins Oil Pan Gasket – QSC

The oil pan gasket provides a tight seal at the base of the QSC block, keeping oil contained and preventing leaks.

• Precision-engineered for QSC fitment

• Made from high-strength composite materials for long life

Why Choose Diesel Pro Power for Cummins QSC Gaskets?

• Engine-Specific Fit: Every gasket listed is manufactured for the QSC engine, ensuring compatibility and durability.

• Trusted by 40,000+ Customers: Diesel Pro Power is the go-to source for marine and industrial Cummins parts worldwide.

• Fast Shipping & Global Availability: We deliver Cummins QSC gaskets quickly, so you minimize downtime.

• Expert Support: Our specialists can guide you to the correct gasket set or individual seal for your application.