Cylinder Head

Caterpillar 3408 Cylinder Head Parts Catalog

The Caterpillar 3408 engine is one of the most respected heavy-duty diesel platforms ever built, known for its ability to deliver power in continuous-duty marine and industrial applications. At the heart of this engine lies the cylinder head assembly—a critical component that ensures proper airflow, fuel combustion, and long-term reliability.

This catalog provides a comprehensive overview of available cylinder heads, gaskets, valves, seals, and related hardware for Caterpillar 3408 engines. Every part listed here is built for durability, precision, and compatibility with both marine and industrial applications.

Complete Cylinder Heads for Caterpillar 3408 Engines

Bare Cylinder Head (Without Valves or Springs)

The bare cylinder head is designed for customers who prefer to assemble their own head with selected valves, springs, and seals. It provides a solid foundation for custom configurations, ensuring compatibility with precombustion chamber 3408 engines.

Benefits of choosing a bare head:

• Full control over component selection

• Cost-effective option for rebuilders

• High-quality casting built to OEM specifications

Complete Cylinder Head (With Valves and Springs Installed)

For operators who prefer a ready-to-install solution, the complete cylinder head comes with valves, springs, and retainers pre-installed. This reduces installation time and ensures all components are matched correctly.

Advantages include:

• Simplified installation process

• Perfect for emergency repairs where downtime must be minimized

• Tested assemblies for proper fit and sealing

Cylinder Head Gasket Sets for Caterpillar 3408

Cylinder head gasket sets are essential for sealing combustion chambers and coolant passages between the head and block. Diesel Pro Power provides sets tailored to specific serial number ranges and arrangements of the 3408 engine.

Standard Cylinder Head Gasket Sets

• Designed for engines in earlier production runs

• Includes all gaskets needed for one engine rebuild

• Prevents coolant and oil leaks under extreme compression

Updated Cylinder Head Gasket Sets

• Built for later serial number prefixes, such as 1LG, 8RG, and 99U series

• Enhanced durability for high-load industrial and marine applications

• Ensures precise sealing for extended service life

Head Bolts and Washers for Caterpillar 3408

Heavy-Duty Head Bolts

Cylinder head bolts provide the necessary clamping force to keep the head secured to the block under extreme pressures. Diesel Pro Power offers 12-point bolts and standard-thread bolts to match different arrangements of the 3408.

Features:

• High-tensile steel construction

• Corrosion-resistant finish for marine environments

• Precision threading to prevent torque loss

Head Bolt Washers

Washers distribute the clamping load evenly across the cylinder head surface, preventing distortion or warping. These are essential when replacing head bolts to maintain torque accuracy.

Valves for Caterpillar 3408 Engines

Intake Valves

The intake valves control airflow into the combustion chamber. Caterpillar 3408 intake valves are designed to resist high temperatures while ensuring smooth airflow for optimal combustion efficiency.

• Hardened stems for wear resistance

• Precision-ground faces for tight sealing

• Designed for specific arrangement numbers to ensure perfect fit

Exhaust Valves

Exhaust valves release burned gases from the combustion chamber. These must withstand extreme heat and pressure, making material strength and seat compatibility critical.

• Manufactured from heat-resistant alloys

• Works with OEM valve seat inserts

• Long service life in both continuous-duty marine and heavy industrial use

Valve Train Components

Rotocoil Assemblies

Rotocoils extend valve life by slowly rotating the valve with each actuation, preventing uneven wear on the valve seat. Available for single spring applications, these are critical for long-lasting performance.

Valve Guides

Valve guides support the valve stems, keeping them properly aligned during operation. Over time, guides can wear and cause excess oil consumption or loss of compression. Diesel Pro Power provides precision-machined guides for intake and exhaust applications.

Valve Seat Inserts

Seat inserts provide the hardened surface that intake and exhaust valves seal against. Properly matched seat inserts ensure compression integrity and prevent valve burning.

Valve Springs

Springs ensure valves return to their closed position quickly and securely. Caterpillar 3408 valve springs are built to withstand millions of compression cycles without weakening.

Valve Locks

Valve locks secure the valve spring retainers in place. Though small, they are essential to valve train integrity. Diesel Pro Power supplies precision-machined valve locks to OEM standards.

Precombustion Chamber Components

The Caterpillar 3408 precombustion chamber system plays a critical role in atomizing fuel for efficient combustion. Over time, these components experience extreme heat stress and require replacement.

Precombustion Chambers

Durable chamber assemblies designed to withstand the high thermal cycling of diesel combustion.

Seals, Washers, and Gaskets

• O-Rings: Prevent fuel and coolant leaks around the chamber

• Washer Seals: Provide secure seating under high pressure

• Chamber Gaskets: Maintain tight combustion sealing

Each replacement ensures proper combustion and prevents fuel leakage that can lead to reduced efficiency or engine damage.

Additional Cylinder Head Components

Push Rods

Push rods transfer motion from the camshaft to the rocker arms, operating intake and exhaust valves. Caterpillar 3408 push rods are built to withstand bending and high-stress operation.

Valve Lifters

Also known as tappets, lifters maintain consistent valve timing by transmitting camshaft lift to the push rods. Precision-machined lifters help reduce wear and maintain smooth operation.

Why Cylinder Head Maintenance Matters on Caterpillar 3408 Engines

The cylinder head assembly is exposed to the highest temperatures and pressures within the engine. Proper maintenance and timely replacement of components are critical to:

• Maintaining compression and fuel efficiency

• Preventing coolant and oil leaks

• Reducing downtime in marine and industrial operations

• Extending overall engine lifespan

By using high-quality replacement parts, operators can ensure reliability in demanding applications such as offshore vessels, heavy construction equipment, and stationary power units.

Why Choose Diesel Pro Power for Caterpillar 3408 Cylinder Head Parts

Global Reach: Diesel Pro Power ships Caterpillar 3408 cylinder head parts to more than 180 countries, ensuring operators around the world can access the parts they need without long delays. Whether your vessel is docked in a busy port or your equipment is stationed at a remote industrial site, our fast and reliable logistics minimize downtime and keep your operations running smoothly.

Trusted Reputation: With over 40,000 satisfied customers, Diesel Pro Power has built a reputation as one of the most dependable suppliers in the diesel engine parts industry. Our customers include fleet managers, ship operators, contractors, and independent mechanics who rely on consistent quality and reliable delivery. Choosing Diesel Pro means joining a global network of professionals who value performance, trust, and long-term partnerships.

Complete Catalog: From bare 3408 cylinder heads to fully assembled heads with valves and springs, we provide every component required for a successful rebuild. Beyond major assemblies, our catalog also includes the smaller but equally important pieces—valve locks, washers, seals, and precombustion chamber gaskets. Having everything in one place means you save time sourcing, avoid compatibility issues, and can confidently place a single order for all the parts you need.

Marine & Industrial Focus: Unlike general suppliers who divide their attention across automotive and passenger vehicle markets, Diesel Pro Power is dedicated to heavy-duty diesel engines in marine and industrial applications. That means our parts and expertise are tailored specifically to the demands of engines like the Caterpillar 3408, which must operate under continuous load, often in challenging environments. This specialization ensures that every part you order is designed with reliability and durability as a top priority.

Expert Support: Selecting the correct cylinder head, gasket set, or valve for a Caterpillar 3408 can be complex due to variations in arrangement numbers and serial prefixes. Our experienced team provides personalized assistance to help you identify the exact parts your engine requires. This reduces the risk of ordering errors, prevents unnecessary downtime, and ensures you get the right fit the first time. Our experts are available to walk you through compatibility questions, installation tips, and best practices for maximizing the life of your rebuild.

Commitment to Long-Term Value: Beyond just supplying parts, Diesel Pro Power is committed to extending the life and efficiency of your Caterpillar 3408 engine. By offering durable, OEM-quality replacements and unmatched customer service, we help you lower operating costs, improve reliability, and gain confidence that your engine will deliver when it matters most.