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Cylinder Head Catalog for Cummins Marine & Industrial Applications
Introduction: Dependable Power Starts at the Top
In every Cummins diesel engine—whether it’s driving a workboat, powering a remote generator, or running vital industrial equipment—the cylinder head plays a critical role. Responsible for sealing the combustion chamber, housing fuel injectors, regulating air and exhaust flow, and transferring heat, the cylinder head must perform under extreme pressure and heat. For marine and industrial applications, where reliability is essential and downtime is costly, a high-quality cylinder head is not optional—it’s a necessity.
At Diesel Pro Power, we specialize in aftermarket Cummins cylinder heads engineered with top-grade materials for exceptional durability, precision, and compatibility. We stock components for all major Cummins engine families, from compact 4-cylinder models to the most powerful 12- and 16-cylinder configurations. Whether you're overhauling an auxiliary generator on a cargo ship or replacing the top-end of a tugboat's propulsion engine, Diesel Pro delivers fast, secure access to the parts you need—without the wait or inflated costs.
What Makes a Great Cylinder Head for Cummins Engines?
The cylinder head is the structural platform for critical engine components. In a high-compression Cummins diesel, this means it must be:
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Precisely machined to ensure a tight seal and efficient combustion
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Resistant to extreme thermal cycling and combustion pressures
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Designed for compatibility with injector sleeves, valve guides, and gaskets
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Strong enough to support turbocharging and aftercooling configurations
A failure in the cylinder head—whether due to cracks, warping, or erosion—can result in:
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Coolant or oil leaks
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Loss of engine compression
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Valve timing issues
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Engine misfiring or overheating
That’s why we only offer top-grade aftermarket Cummins cylinder heads that meet or exceed OEM standards in form, function, and durability.
Why Buy Cummins Cylinder Heads from Diesel Pro Power?
Fast Shipping, Global Reach
We ship most orders within 24 hours. Customers in the United States, Latin America, the Caribbean, the Middle East, and across Europe depend on our streamlined logistics. For international orders, duties and taxes can be prepaid for quicker, hassle-free delivery.
Large, Accurate Inventory
From older mechanical models to the latest electronically controlled engines, our inventory covers virtually every Cummins cylinder head still in service today. Each part listing is clearly labeled and easy to search by engine model, making it simple to get the exact part you need.
Top-Grade Aftermarket Quality
Our heads are manufactured using top-grade materials selected for durability, heat tolerance, and corrosion resistance. We offer both bare and fully assembled cylinder heads—complete with valves, valve seats, valve springs, and injector sleeves—to suit different repair or rebuild scenarios.
Direct Pricing with No Middleman
Because Diesel Pro Power is a warehouse-direct provider, you pay less. There are no hidden markups from dealers or resellers, and you get warehouse-level pricing with fast fulfillment.
Secure Ordering and Expert Support
Our website is built on a secure platform that protects your data during every transaction. If you’re not sure which cylinder head is compatible with your engine, our team is here to help. Contact us via phone, email, or live chat, and one of our bilingual diesel experts will assist you in English or Spanish.
Cummins Cylinder Heads by Engine Model
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B Series: 4B, 4BT, 4BTA, 6B, 6BT, 6BTA, ISB, QSB
The Cummins B Series is known for its compact size, fuel efficiency, and reliability in both marine and industrial settings. These engines are popular in auxiliary marine power, agriculture, and light-duty construction.
Key Features:
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Available in 4- and 6-cylinder configurations
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Mechanical and electronically controlled variants
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Support for turbocharged and aftercooled designs
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Ideal for rebuilds, repowers, and top-end service
Common Applications:
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Fishing boats
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Marine generators
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Farm equipment
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Light industrial pumps and compressors
Cylinder head–related components may include injector sleeves, valves, valve springs, retainers, locks, head gaskets, head bolts, rocker assemblies, push rods, and in some cases, mating components such as camshafts and thermostats.
Cylinder Head and Related Components Catalog for the Following Engine Models:
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ISB Cylinder Head and Related Components Catalog
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QSB Cylinder Head and Related Components Catalog
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Cylinder Head Catalog For C Series: 6C, 6CT, 6CTA, ISC, QSC
Cummins C Series engines serve as mid-range workhorses in marine propulsion and heavy-duty industrial systems. The 6CTA is especially popular in high-speed commercial vessels.
Key Features:
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Mechanical and electronic control options
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High torque and reliable fuel delivery
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Complete head assemblies and individual top-end components available
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Ideal for long-duty cycle use in tough environments
Common Applications:
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Passenger ferries
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Crabbing and lobster boats
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Agricultural irrigation systems
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Industrial firefighting pumps
Cylinder head–related components may include injector sleeves, valves, valve springs, retainers, locks, head gaskets, head bolts, rocker assemblies, push rods, and in some cases, mating components such as camshafts and thermostats.
Cylinder Head and Related Components Catalog for the Following Engine Models:
Cylinder Head Catalog For L Series: L10, ISL, QSL
Cummins L Series engines provide the next step up in power and displacement, delivering exceptional performance in both mobile and stationary operations.
Key Features:
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Built for high-load, continuous operation
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Designed for durability with low maintenance intervals
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Options for industrial and marine compliance
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Electronically managed variants available
Common Applications:
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Marine hydraulic systems
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Dredging vessels
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Municipal water systems
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Industrial power units
Cylinder head–related components may include injector sleeves, valves, valve springs, retainers, locks, head gaskets, head bolts, rocker assemblies, push rods, and in some cases, mating components such as camshafts and thermostats.
Cylinder Head and Related Components Catalog for the Following Engine Models:
Cylinder Head Catalog For M Series: M11, ISM, QSM
Cummins M Series engines are high-output powerplants used in marine propulsion and heavy-duty industrial systems requiring sustained horsepower.
Key Features:
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Robust castings with precision-machined surfaces
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Designed for top-end and full-engine rebuilds
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Suitable for turbocharged and aftercooled configurations
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Available for both mechanical and electronic versions
Common Applications:
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Tugboats and offshore vessels
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Ferries and cargo support boats
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High-horsepower pumps and power units
Cylinder head–related components may include injector sleeves, valves, valve springs, retainers, locks, head gaskets, head bolts, rocker assemblies, push rods, and in some cases, mating components such as camshafts and thermostats.
Cylinder Head and Related Components Catalog for the Following Engine Models:
Cylinder Head Catalog For N Series: NH855, NT855, N14
The legendary N Series remains a staple in marine, construction, and oilfield applications thanks to its long service life and rebuild-friendly design.
Key Features:
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Large displacement and heavy-duty top-end systems
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Cylinder heads engineered for high compression and long duty cycles
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Wet and dry cylinder configurations supported
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Parts compatible with legacy CPLs
Common Applications:
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Tugboats and barge propulsion
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Oilfield generators
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High-capacity water pumps
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Marine auxiliary systems
Cylinder head–related components may include injector sleeves, valves, valve springs, retainers, locks, head gaskets, head bolts, rocker assemblies, push rods, and in some cases, mating components such as camshafts and thermostats.
Cylinder Head and Related Components Catalog for the Following Engine Models:
Cylinder Head Catalog For X Series: ISX, QSX
Cummins X Series engines combine high power with advanced emissions systems, making them suitable for modern marine and industrial operations requiring clean, dependable output.
Key Features:
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Designed for high-efficiency combustion
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Cylinder heads compatible with EGR, DPF, and SCR systems
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Engineered for emissions compliance and performance
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Ideal for newer fleets and replacement programs
Common Applications:
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Patrol and security boats
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Military-grade transport
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Modern offshore and port applications
Cylinder head–related components may include injector sleeves, valves, valve springs, retainers, locks, head gaskets, head bolts, rocker assemblies, push rods, and in some cases, mating components such as camshafts and thermostats.
Cylinder Head and Related Components Catalog for the Following Engine Models:
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ISX Cylinder Head and Related Components Catalog
Cylinder Head Catalog For K Series: KTA19, KTA38, KTA50, QSK19
Cummins K and QSK Series engines are high-horsepower machines built for major marine propulsion, commercial hauling, and industrial support platforms.
Key Features:
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Cast for structural stability and extreme thermal load
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Cylinder heads available for 6-, 12-, and 16-cylinder applications
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Built to support heavy turbocharging and electronic fuel control
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Ideal for continuous-use power operations
Common Applications:
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Drill ships and offshore oil rigs
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Ocean-going tugs
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Remote mine and gas site generators
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Floating platforms and supply vessels
Cylinder head–related components may include injector sleeves, valves, valve springs, retainers, locks, head gaskets, head bolts, rocker assemblies, push rods, and in some cases, mating components such as camshafts and thermostats.
Cylinder Head and Related Components Catalog for the Following Engine Models:
Frequently Asked Questions – Cummins Cylinder Heads & Related Components
General Questions About Cylinder Heads
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What is the function of a cylinder head in a Cummins diesel engine?
The cylinder head forms the upper part of the combustion chamber and houses essential components such as valves, valve springs, and fuel injectors. It plays a critical role in air intake, exhaust flow, fuel delivery, and combustion sealing. -
What are the symptoms of a failing or cracked cylinder head?
Symptoms include white exhaust smoke, engine overheating, coolant loss, misfiring, oil in the coolant, and loss of compression. -
Are Diesel Pro Power’s cylinder heads genuine Cummins parts?
No, we sell high-quality aftermarket cylinder heads manufactured with top-grade materials that meet or exceed OEM specifications. -
Do you sell both bare and complete cylinder heads?
No. All Cummins cylinder heads we offer come fully assembled with valves and valve springs installed. We do not sell bare heads. -
Are rocker arms included with the cylinder head?
No. Rocker arms are sold separately and are not included with any Cummins cylinder head. -
Can I install a new cylinder head myself?
If you have diesel engine repair experience and the correct tools, yes. Be sure to follow torque specs and service procedures closely. -
How do I know which cylinder head fits my Cummins engine?
Identify your engine model and CPL (Control Parts List) number or serial number. If you need help, contact us and our team will confirm the correct head. -
What tools are required to install a Cummins cylinder head?
A torque wrench, head bolt socket, alignment tools, feeler gauge, and possibly valve adjustment tools, depending on the model. -
Should I replace the head bolts when changing the cylinder head?
Yes. Cummins uses torque-to-yield bolts which must be replaced during installation to ensure a proper seal. -
Can a warped cylinder head be resurfaced?
In some cases, yes, but only within factory tolerance limits. Severely warped or cracked heads should be replaced entirely.
Model-Specific Cylinder Head FAQs
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Do you offer cylinder heads for the Cummins 4B and 4BT engines?
Yes. We offer fully assembled cylinder heads with valves and springs installed for both marine and industrial 4B and 4BT models. -
Are cylinder heads for the 6BT and 6BTA interchangeable?
Not always. 6BTA heads may have additional ports and coolant passages due to the aftercooler setup. Confirm your CPL before ordering. -
Do you carry heads for the QSB and ISB marine engines?
Yes. We carry cylinder heads specifically for QSB and ISB models used in marine generator and propulsion applications. -
Do you sell cylinder heads for the Cummins 6CTA 8.3 engine?
Yes. We stock complete heads for both recreational and commercial marine versions of the 6CTA, including common CPL configurations. -
What’s the difference between 6CTA and QSC cylinder heads?
QSC heads are designed for electronic fuel systems and may include sensor ports not found on mechanical 6CTA heads. -
Are ISC and ISL cylinder heads interchangeable?
Not directly. While similar, ISC and ISL heads have variations in coolant routing and emissions systems that require matching components. -
Do you sell cylinder heads for L10 engines?
Yes. We provide heads and top-end components for the Cummins L10 engine used in marine and heavy industrial equipment. -
Are QSL heads available for marine use?
Yes. Our catalog includes QSL cylinder heads suited for marine and stationary power units, built with corrosion-resistant features. -
Can I get a cylinder head for a Cummins M11 engine?
Absolutely. We stock complete M11 cylinder heads, compatible with many CPL numbers used in commercial and marine fleets. -
What’s the difference between an M11 and QSM11 cylinder head?
QSM11 heads support electronic controls and have different configurations compared to older M11 mechanical heads.
Cylinder Head Installation and Maintenance
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Are valve springs already installed in your cylinder heads?
Yes. All Cummins cylinder heads from Diesel Pro Power come fully assembled with valves and valve springs installed. -
Do I need to install injector sleeves separately?
No. Injector sleeves come pre-installed in our complete cylinder heads unless otherwise noted. -
Are head gaskets included with the cylinder head?
No. Head gaskets are sold separately but are available as part of our top-end gasket kits. -
Do you offer torque specs for head installation?
Yes. Contact us with your CPL number and we’ll provide the correct torque values. -
What causes a cylinder head to fail?
Overheating, improper torqueing, poor coolant maintenance, and long service intervals are common causes. -
Can I reuse my old rocker arms with a new head?
If they’re in good condition, yes. But for best results, inspect and consider replacing them with new components. -
Do cylinder heads require valve lash adjustment after installation?
Yes. After installation, a valve lash adjustment is necessary to ensure proper operation. -
What fluids can damage a cylinder head?
Contaminated coolant, incorrect oil types, or fuel leaks can corrode or damage the head’s sealing surfaces. -
Do I need a special gasket for marine engines?
Some marine engines require high-performance or corrosion-resistant gaskets. Check compatibility before installing. -
How long does a Cummins cylinder head last?
With proper maintenance, Cummins heads typically last 10,000 to 20,000 hours or more.
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Ordering, Shipping & Warranty FAQs
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How fast do you ship Cummins cylinder heads?
We ship most orders within 24 hours, including international orders with taxes and duties prepaid. -
Do you offer international shipping?
Yes. We ship worldwide and offer expedited delivery with customs handling included. -
Can I return a cylinder head if it doesn’t fit?
Yes, as long as it’s unused and in original condition. Contact our support team to start the return. -
What warranty comes with your cylinder heads?
All of our Cummins cylinder heads come with a 1 year full product warranty against material or manufacturing defects. -
Can I pay via wire transfer?
Yes. We accept wire transfers upon request, along with major credit cards and secure checkout. -
Do you offer fleet or wholesale discounts on cylinder heads?
No. At Diesel Pro Power, we always show our best price up front. There are no hidden markups or special pricing tiers—everyone gets our most competitive rate. -
Do I need to pay import duties on international orders?
No. You can choose to prepay all import duties and taxes during checkout, which speeds up delivery and avoids delays at customs. -
Will I receive tracking for my order?
Yes. Once your order ships, you'll receive an email with a tracking number and shipping confirmation. -
Are cylinder heads packaged to prevent damage during shipping?
Yes. We use reinforced, impact-resistant packaging and internal cushioning to ensure your cylinder head and components arrive safely. -
Can I get help choosing the right cylinder head before ordering?
Absolutely. Our diesel engine experts are available by phone, email, or live chat to help you confirm compatibility based on your engine model or CPL number.
Advanced Technical & Compatibility FAQs
41. Do you carry marine-rated cylinder heads for the Cummins KTA19 engine?
Yes. We carry KTA19 cylinder heads suitable for both marine and industrial use, built with top-grade materials and corrosion-resistant properties.
42. Do QSK19 engines use the same cylinder head as KTA19 engines?
No. While similar in displacement, QSK engines are electronically controlled and require cylinder heads with different casting features, sensor ports, and coolant routing.
43. Do you carry cylinder heads compatible with Tier 3 and Tier 4 compliant Cummins engines?
Yes. Many of our cylinder heads are compatible with Tier 3–certified engines, and select models are available for Tier 4 applications. Contact us for verification.
44. What is the difference between a cast iron and aluminum cylinder head?
Cummins cylinder heads are typically made from cast iron due to their superior strength and heat resistance. Aluminum heads are more common in automotive gas engines and are not used in heavy-duty Cummins diesel applications.
45. Can a damaged injector sleeve cause white smoke from the exhaust?
Yes. Cracked or leaking injector sleeves can allow coolant to enter the combustion chamber, resulting in white smoke and potential coolant loss.
46. Are cylinder heads different between marine propulsion and marine auxiliary engines?
They can be. Differences may include corrosion protection, coolant routing, and sensor configurations depending on the specific application.
47. Can I upgrade a mechanical Cummins engine to use an electronically controlled head?
No. Electronic heads require complete ECM, wiring harness, and sensor integrations, which are not interchangeable with mechanical fuel systems.
48. Where can I find my Cummins engine's CPL number?
Your CPL number is stamped on the dataplate located on the side of the engine block. If it’s missing, your engine’s serial number can also help us determine the correct part.
49. What if I don’t see my engine model listed on your website?
Contact us directly. We likely carry the parts or can source them through our extended supplier network, even if they're not currently listed online.
50. Can Diesel Pro Power confirm part compatibility using my engine’s serial number?
Yes. Our customer service team can verify cylinder head compatibility using either your engine’s serial number or CPL number—just reach out before placing your order.
