Cummins QSB 7.0 Engine Parts – Gasket & Seal Catalog

Introduction to Cummins QSB 7.0 Gaskets and Seals

The Cummins QSB 7.0 engine is known for its durability, efficiency, and adaptability in both marine and industrial applications. To maintain peak performance and reliability, it’s essential to keep the engine’s sealing systems in top condition. Gaskets and seals form the backbone of leak prevention, ensuring oil, coolant, fuel, and combustion gases remain where they belong.

In this catalog, you’ll find a comprehensive selection of genuine Cummins QSB 7.0 gaskets, O-rings, and sealing compounds, designed to meet or exceed OEM specifications. Whether you need a full gasket set for an overhaul, a specialized seal for the raw water pump, or high-performance RTV silicone for turbocharger installations, Diesel Pro Power supplies the right components—delivered quickly and ready to install.

Marine Water Pump Gaskets & Seals for QSB 7.0

Gasket to Mount the Marine Raw Water Pump

A properly mounted marine water pump depends on a reliable mounting gasket. This gasket creates a secure seal between the pump housing and the engine, preventing seawater leaks that could damage components or reduce cooling efficiency.

Applications: Ideal for QSB 7.0 marine configurations, as well as other QSB and ISC/QSC engines in similar cooling setups.

Marine Water Pump O-Ring

This O-ring provides a leak-proof seal for both the inlet and outlet ports of the marine water pump.

• Two O-rings are required per engine.
  
  

• Designed to handle constant seawater exposure without swelling or degrading.
  
  

Use Case: Prevents seawater seepage at hose connections, which can otherwise lead to corrosion and reduced cooling efficiency.

Full Engine Gasket Sets for Overhauls

Upper Gasket Set – QSB 7.0 Engines

The upper gasket set includes all the necessary sealing components for the cylinder head, intake, exhaust, and valve covers.
Key Benefits:

• Maintains compression integrity.
  
  

• Prevents coolant and oil cross-contamination.
  
  

• Essential for any top-end rebuild or head replacement.
  
  

Lower Gasket Set – QSB 7.0 Engines

The lower gasket set contains all seals and gaskets for the oil pan, timing cover, water pump housing, and related components below the cylinder head.
Key Benefits:

• Stops oil leaks from the lower engine block.
  
  

• Protects against dirt and water intrusion from below.
  
  

• Recommended during bottom-end rebuilds or major maintenance.
  
  

Oil System Gaskets for QSB 7.0

Oil Pan Gasket

Forms a tight seal between the oil pan and engine block, preventing oil leaks and maintaining correct oil pressure. Built from oil-resistant materials to withstand long-term exposure.

Gasket for Oil Pick-Up Tube

Creates a sealed connection between the oil pick-up tube and the oil pump housing, ensuring proper oil flow to lubricate and protect the engine.

Air Intake & Aftercooler Gaskets

Intake Manifold Cover Gasket

Seals the intake manifold cover, preventing air leaks that can disrupt the air-fuel mixture and reduce efficiency.

O-Ring for Aftercooler

Prevents air or coolant leakage at aftercooler connections.

• Withstands both temperature fluctuations and high boost pressure.
  
  

• Ensures maximum charge-air cooling efficiency.
  
  

Cylinder Head Area Gaskets

Valve Cover Gasket

Maintains a leak-free seal between the valve cover and cylinder head, keeping oil in and contaminants out.

Fuel System Gaskets

Fuel Transfer Pump Gasket

Provides a secure seal between the fuel transfer pump and the engine, ensuring consistent fuel delivery without leakage.

Fuel Injection Pump Gasket

Seals the fuel injection pump to the engine block, preventing both fuel and air leaks in high-pressure injection systems.

Oil Cooler & Turbocharger Gaskets

Oil Cooler Cover Gasket

Seals the oil cooler housing cover, preventing engine oil leaks and maintaining correct operating temperature.

Turbo Oil Drain Gasket

Prevents oil leakage from the turbocharger drain line, helping to keep oil flowing freely back to the sump.

Cooling System Seals

Water Pump Seal Ring

Forms a watertight seal at the water pump connections to prevent coolant loss.

Thermostat Seal

Ensures a leak-free seal around the thermostat housing, preventing coolant bypass.

High-Performance Sealants & Gasket Makers

Diesel Pro Power supplies a complete range of professional-grade sealants designed for high-temperature, high-pressure Cummins QSB 7.0 applications.

Hi-Temperature Jointing Compound

Suitable for turbocharger installations with extreme heat resistance.

Gasket Spray – High Tack Sealant

Perfect for holding and sealing cut gaskets during installation.

3H Gasket Maker – Liquid Sealant

Ideal for forming custom gaskets in place or sealing irregular surfaces.

High-Strength Threadlocker (Red)

Locks threaded fasteners securely in high-vibration environments.

Gasket Maker – Silicone Sensor Safe

Forms a flexible, oil-resistant seal without damaging engine sensors.

J-B Weld – Cold Weld Compound

Provides a permanent, steel-reinforced bond for emergency repairs.

Gasket Maker – High-Temp RTV Silicone

Withstands extreme heat, ideal for exhaust and turbo components.

Gasket Maker – Ultra Blue RTV Silicone Sensor Safe

Flexible and durable sealing for a variety of QSB 7.0 components.

Gasket Maker – Non-Hardening Pliable Sealant

Remains flexible after curing, perfect for parts requiring future disassembly.

Why Choose Diesel Pro Power for QSB 7.0 Gaskets & Seals

• Genuine and OEM-spec components for perfect fit and performance.
  
  

• 40,000+ satisfied customers worldwide trust our quality.
  
  

• Same-day shipping on in-stock parts for minimal downtime.
  
  

• Expert support from a team with hands-on Cummins experience.