Cummins QSL Gasket Catalog

The Cummins QSL engine is a widely used mid-range diesel platform valued for its reliability in marine, industrial, and power generation applications. Like all diesel engines, it relies on a wide range of gaskets to create perfect seals between components, prevent fluid leaks, and maintain correct combustion pressure. The following catalog provides a detailed breakdown of gasket solutions available for the Cummins QSL, including complete gasket sets, individual component gaskets, and supporting sealants.

With more than 40,000 satisfied customers worldwide, Diesel Pro Power supplies high-quality Cummins QSL gaskets to keep your engine performing at peak efficiency.

Complete Gasket Sets for Cummins QSL

Upper Gasket Set for Cummins QSL

The upper gasket set includes all major gaskets and seals required for the cylinder head and top-end components of the QSL engine. This kit typically contains head gaskets, intake and exhaust manifold gaskets, valve cover gaskets, injector seals, and other essential top-end sealing elements.

• Designed for engines with both CAPS fuel systems and HPCR fuel systems.

• Provides a complete solution when servicing the head or performing major top-end repairs.

• Ensures precise compression sealing, reducing the risk of combustion gas leakage or coolant intrusion.

Lower Gasket Set for Cummins QSL

The lower gasket set covers the bottom-end components, including oil pan gaskets, crankshaft seals, gear housing gaskets, and water pump seals.

• Used in rebuilds or when repairing lower block components.

• Ensures protection against oil leaks and crankcase pressure loss.

• Complements the upper set for full-engine gasket replacement.

Individual Gaskets for Cummins QSL

While full gasket sets are ideal for rebuilds, many applications only require individual gasket replacement. Below is a breakdown of the most commonly used individual Cummins QSL gaskets.

Cylinder Head and Valve Train Gaskets

Valve Cover Gaskets for Cummins QSL

Valve cover gaskets prevent oil leaks from the rocker cover assembly. Available for covers with 5-bolt or 8-boltconfigurations.

• High-temperature resistant design.

• Maintains oil seal integrity under vibration and thermal expansion.

Exhaust Manifold Gaskets for Cummins QSL

Exhaust manifold gaskets seal the joint between the cylinder head and exhaust manifold.

• Designed to handle extreme exhaust gas temperatures.

• Prevents leaks that could cause power loss or turbo damage.

Intake Manifold Cover Gasket for Cummins QSL

For QSL engines with air heater-equipped manifolds, the intake manifold cover gasket ensures air-tight sealing.

• Prevents unmetered air leaks that could impact combustion efficiency.

Turbocharger-Related Gaskets

Turbo Mounting Gaskets for Cummins QSL

Turbo mounting gaskets provide an airtight seal between the turbocharger and exhaust manifold. Versions are available for both standard and water-cooled turbo setups.

• Prevents exhaust gas leaks that could reduce turbo efficiency.

• Resists high temperatures and pressure cycles.

Turbo Oil Supply Gasket for Cummins QSL

This gasket seals the turbocharger’s oil supply line, preventing oil leaks that could cause premature turbo failure.

Oil System Gaskets

Oil Pan Gaskets for Cummins QSL

Multiple designs are available for above or below the block stiffener plate.

• Provides long-lasting sealing against oil seepage.

• Helps maintain crankcase integrity.

Oil Suction Connection Gasket

Ensures a tight seal for the oil pickup tube, preventing air intrusion into the lubrication system.

Oil Cooler Cover Gasket

Provides a secure seal for the oil cooler housing, preventing cross-contamination of oil and coolant.

Gear Housing and Cover Gaskets

Gear Housing Gasket

Seals the front gear housing, maintaining proper lubrication and preventing oil loss.

Rear Cover Gasket

Fits the rear cover of the QSL block, protecting against fluid leaks and ensuring long-term durability.

EGR and Emissions Gaskets

EGR Valve Gasket

Seals the Exhaust Gas Recirculation (EGR) valve to prevent leaks in emission control systems.

Specialized Sealants and Joint Compounds for Cummins QSL

While gaskets provide the primary sealing surfaces, certain components require additional sealants or adhesives for proper function. Diesel Pro Power offers a full range of high-performance sealing compounds suitable for Cummins QSL applications.

• High-Temperature Jointing Compound: Designed for turbocharger and exhaust system applications where extreme heat resistance is required.

• Gasket Sprays & Sealants: Assist in holding cut gaskets in place and provide added sealing protection against leaks.

• RTV Silicone Gasket Makers: Available in standard, sensor-safe, and high-temperature formulations for versatile sealing needs.

• Threadlocker Compounds: Ensure bolts and fasteners remain secure under vibration.

• Cold Weld Compounds: Used for emergency or permanent repairs on metal surfaces where welding is impractical.

Why Choose Diesel Pro Power for Cummins QSL Gaskets?

1. Specialized Coverage: Every gasket listed here is engineered for Cummins QSL engines, ensuring the right fit and performance.

2. Trusted by 40,000+ Customers: Worldwide reputation for supplying dependable diesel engine components.

3. Marine & Industrial Expertise: Unlike general suppliers, Diesel Pro Power specializes in marine and heavy-duty diesel applications.

4. Complete Solutions: From upper and lower gasket sets to single replacement gaskets and sealants, all needs are covered.

5. Fast Global Shipping: Parts ship quickly and reliably, keeping downtime to a minimum.