Cummins QSB 7.0 Parts - Cylinder Head Section

Cylinder Heads & Related Components for Cummins QSB 7.0 Engines

The Cummins QSB 7.0 engine is built on the proven B Series platform and is widely used in construction equipment, agricultural machinery, marine auxiliary systems, and industrial applications. Its design emphasizes durability, thermal efficiency, and clean emissions—making proper cylinder head maintenance a top priority for long-term engine health.

At Diesel Pro Power, we provide a complete selection of new cylinder heads and related components for the Cummins QSB 7.0. Whether you're dealing with excessive valve lash, combustion gas leaks, or a complete top-end overhaul, our catalog is structured to help you find everything you need in one place.

Complete Cylinder Head Assemblies for QSB 7.0

We offer fully assembled cylinder heads for Cummins QSB 7.0 engines that come with all valves pre-installed. These heads are ready to install out of the box and meet OEM specifications for flow, metallurgy, and machining. By replacing your worn or cracked cylinder head with a new complete unit, you ensure uniform compression across all cylinders, reduce blow-by, and restore full engine power.

Key Features:

• Pre-installed intake and exhaust valves

• Designed to match factory flow characteristics

• Ideal for high-hour engines or damaged castings

• New construction—never remanufactured

• Suitable for marine and industrial variants

Whether you're replacing a failed head or planning preventative maintenance, our cylinder heads provide an exact fit for your QSB 7.0 engine, ensuring maximum durability under load and temperature extremes.

Intake & Exhaust Valves for Cummins QSB 7.0

Valve performance is critical to the timing and efficiency of air exchange inside your engine's combustion chamber. We carry high-quality intake and exhaust valves that are designed specifically for QSB 7.0 engines.

Intake Valves:

• Optimized for airflow to support clean combustion

• Constructed with heat-resistant alloys

• Machined for precision sealing against the valve seat

Exhaust Valves:

• Built to withstand elevated exhaust temperatures

• Compatible with QSB 6.7 and QSB 7.0 configurations

• Available individually or as part of exhaust valve kits with seals included

Replacing worn or pitted valves can prevent power loss, misfires, and premature valve seat damage.

Cylinder Head Bolts for QSB 7.0 Engines

Cylinder head bolts are torque-to-yield components and must be replaced during any head removal or installation. We stock head bolts in all required sizes for QSB 7.0 engines, including both short and long formats.

What to Know:

• Always replace head bolts when installing a new cylinder head

• Proper torque sequence and lubrication are essential

• Incorrect bolt tension can lead to head gasket failure

Our catalog includes the exact quantities and sizes needed per engine, so you can rebuild with confidence.

Upper Gasket Sets & Head Gaskets

When installing a new cylinder head, a high-quality upper gasket set is critical. Diesel Pro Power provides complete upper gasket sets designed for Cummins QSB 7.0 engines, including:

• Head gaskets

• Valve cover gaskets

• Intake and exhaust manifold gaskets

• Thermostat and EGR gaskets

• Rocker housing seals and grommets

Each gasket is manufactured with high-temperature, fuel- and oil-resistant materials to ensure long-term sealing performance. Standard and marine-rated head gaskets are available to match different horsepower levels and applications.

Valve Seals, Guides & Inserts

Proper sealing and alignment of intake and exhaust valves depend on several smaller—but critical—components:

Valve Seals:

• Keep oil from leaking past valve guides into the combustion chamber

• Available for both intake and exhaust valves

• Must be replaced during any valve job

Valve Guides:

• Ensure proper alignment of valve stems

• Minimize stem wear and vibration

• Require press-fit installation and reaming to specification

Valve Seat Inserts:

• Hardened alloy seats for intake and exhaust sides

• Available in standard and oversize dimensions

• Required when refurbishing cylinder heads or replacing damaged seating surfaces

Upgrading these wear components extends head life and supports smoother valve operation.

Push Rods & Related Valvetrain Hardware

Push rods transfer camshaft motion to rocker arms, making them integral to valve actuation. Over time, push rods can wear, bend, or suffer from oil starvation. Our replacement push rods for QSB 7.0 engines are manufactured to OEM standards and ensure consistent valve timing.

We also carry:

• Valve springs: Maintain tension for valve closure and resist float

• Valve rotators: Extend exhaust valve life by ensuring uniform seat wear

• Heavy hex nuts: Used for rocker arm adjustments

Each component is designed for the rigorous duty cycle of a diesel engine and should be inspected and replaced as part of a full cylinder head service.

Cover & Gear Housing Gaskets

Supporting components like the valve cover and gear housing also require robust sealing solutions. Diesel Pro Power offers:

• Valve cover gaskets: Maintain a clean seal at the top of the cylinder head

• Intake manifold gaskets: Ensure proper air channeling with no boost leaks

• Gear housing and gear cover gaskets: Prevent oil seepage from the front accessory drive

Proper reinstallation of these gaskets is critical during top-end rebuilds or maintenance.

Temperature Switches for Engine Monitoring

We also supply temperature switches compatible with Cummins QSB engines, which activate fan relays or engine protection modes at a preset temperature threshold. These switches are ideal for maintaining cooling system efficiency and avoiding head warping due to overheating.

Trust Diesel Pro Power for Cummins QSB 7.0 Cylinder Head Components

Whether you're replacing a cracked head, dealing with excessive oil consumption, or refreshing a worn top-end, Diesel Pro Power has the parts you need to get your Cummins QSB 7.0 engine back to peak performance. With over 40,000 satisfied customers worldwide, our catalog is trusted by engine rebuilders, fleet managers, marine mechanics, and equipment operators.

Why Choose Us:

• Fast shipping worldwide

• Real inventory, not dropshipped

• Dedicated diesel experts on call

• Extensive catalog for QSB engines, including hard-to-find items