Caterpillar 3406 Engine Parts – Gasket Section

The Caterpillar 3406 is one of the most widely used heavy-duty diesel engines across marine, industrial, and truck applications. To keep it performing at peak efficiency, high-quality gaskets are critical. Gaskets seal vital components, preventing leaks and ensuring proper combustion, lubrication, and cooling. At Diesel Pro Power, we supply a complete catalog of aftermarket Caterpillar 3406 gaskets—trusted by more than 40,000 satisfied customers in over 180 countries.

Below is a comprehensive breakdown of the Caterpillar 3406 gasket catalog.

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In-Frame Gasket Set for Caterpillar 3406 Engines

When the 3406 engine is still installed in a chassis, vessel, or machinery frame, an in-frame gasket set is the go-to solution. These kits include everything needed to reseal the top and bottom end of the engine without requiring complete removal.

• Purpose: Designed for mid-life rebuilds while the engine remains mounted.

• Contents: Cylinder head gaskets, intake and exhaust gaskets, valve cover seals, oil pan gaskets, and other critical sealing components.

• Applications: Ideal for fleets, marine operators, and equipment owners looking to restore compression and reliability without a full overhaul.

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Overhaul Gasket Set for Caterpillar 3406 Engines

For a complete rebuild, the overhaul gasket set covers every gasket and seal needed when the engine is fully disassembled.

• Purpose: Ensures a full reseal during major overhauls.

• Coverage: Includes upper and lower engine gaskets, seals for oil and coolant passages, and specialized gaskets for timing and accessory components.

• Benefit: Prevents leaks and guarantees a fresh start for rebuilt engines.

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Cylinder Head Gasket Set for Caterpillar 3406

The cylinder head gasket set is specifically designed for top-end rebuilds. These gaskets create a tight seal between the cylinder head and block, handling extreme combustion pressures.

• Contents: Cylinder head gaskets, intake and exhaust manifold gaskets, valve cover gaskets, and seals for coolant and oil passages.

• Key Role: Prevents coolant-oil cross-contamination and maintains proper compression.

• When Needed: Commonly replaced after overheating, head removal, or cracked head repairs.

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Flywheel Housing Gasket for Caterpillar 3406

The flywheel housing gasket ensures proper sealing between the housing and the engine block.

• Function: Prevents oil leaks around the crankshaft and transmission connection.

• Importance: Vital for keeping the engine bay clean and reducing risk of slippage or contamination in the clutch area.

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Front Cover Gasket for Caterpillar 3406

The front cover gasket seals the timing gear housing.

• Role: Keeps oil inside the timing cover and prevents dust, debris, or moisture from contaminating gears.

• Failure Symptoms: Oil leaks at the front of the engine, gear noise, or premature wear.

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Cylinder Head Spacer Plate for Caterpillar 3406

The spacer plate sits between the block and cylinder head.

• Purpose: Provides a durable, flat sealing surface for the head gasket.

• Material: Precision-machined steel or composite to handle extreme cylinder pressures.

• Benefit: Extends head gasket life and prevents combustion leaks.

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Cylinder Head Gasket for Caterpillar 3406

The head gasket is one of the most critical seals in the 3406 engine.

• Function: Maintains combustion pressure, while sealing coolant and oil passages.

• Failure Risks: Loss of compression, coolant entering combustion chambers, or oil contamination.

• Replacement: Essential during rebuilds or after overheating incidents.

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Aftercooler Gasket for Caterpillar 3406

The aftercooler gasket ensures an airtight seal between the charge air cooler and intake manifold.

• Purpose: Maintains boost pressure and prevents air leaks.

• Impact: Essential for proper turbocharger performance and fuel efficiency.

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Intake Manifold Gasket for Caterpillar 3406

Each Caterpillar 3406 engine requires six intake manifold gaskets .

• Function: Seals the intake runners, ensuring air flows only through designed passages.

• Performance Role: Prevents unmetered air leaks, which can cause poor combustion or loss of power.

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Spacer Plate Gasket for Caterpillar 3406

The spacer plate gasket works in conjunction with the cylinder head spacer plate.

• Purpose: Provides a precision seal between the plate and the block.

• Durability: Designed to withstand repeated heat cycles and vibration.

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Oil Pan Gasket for Caterpillar 3406

The oil pan gasket seals the bottom of the engine block to the oil pan.

• Function: Prevents oil leaks while allowing the oil pan to be removed for maintenance.

• Signs of Failure: Oil drips under the engine, especially after extended use or vibration-heavy applications.

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Exhaust Manifold Gasket for Caterpillar 3406

The exhaust manifold gasket is placed between the manifold and cylinder head.

• Role: Prevents exhaust gas leaks and maintains turbocharger efficiency.

• Failure Symptoms: Black soot around manifold joints, hissing sounds, or loss of boost pressure.

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Turbocharger Gasket for Caterpillar 3406

The turbocharger gasket is essential for sealing exhaust gases as they enter the turbo housing.

• Placement: Installed between the exhaust manifold and turbocharger.

• Importance: Prevents hot gas leaks that can reduce turbo efficiency and damage surrounding components.

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Fresh Water Pump Gasket Seal for Caterpillar 3406

The fresh water pump gasket seal ensures coolant circulates only through designated passages.

• Function: Prevents leaks between the water pump and engine block.

• Critical Role: Helps maintain proper operating temperature, preventing overheating.

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Crankshaft Seals – Front and Rear for Caterpillar 3406

Front Crankshaft Seal

• Prevents oil from leaking at the front crankshaft journal.

• Essential for keeping the timing cover and accessory drive clean.

Rear Crankshaft Seal

• Prevents oil leaks where the crankshaft connects to the transmission flywheel housing.

• Failure often results in oil dripping from the bell housing, a major service concern.

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Why Choose Diesel Pro Power for Caterpillar 3406 Gasket Parts

Global Trust

Diesel Pro Power is trusted by more than 40,000 satisfied customers in over 180 countries . Our reputation has been built on consistent reliability and unmatched service for Caterpillar engines. Whether you operate a long-haul truck, a fishing vessel, or industrial equipment, our customers worldwide depend on us for gasket parts that perform under the toughest conditions.

Fast Shipping

We understand that downtime costs money. That’s why all orders are processed and shipped within 24 hours , complete with real-time tracking information. Whether you’re located in North America, South America, Europe, Asia, or beyond, our logistics network ensures you get Caterpillar 3406 gasket parts quickly—minimizing disruption to your operations.

Engine-Specific Catalogs

Unlike generic suppliers, Diesel Pro Power builds engine-specific catalogs dedicated exclusively to Caterpillar 3406 engines . That means when you order a head gasket, oil pan gasket, or overhaul kit, you can be confident it is engineered specifically for your engine model. This precision cataloging eliminates the frustration of trial-and-error and ensures your rebuild or repair project moves forward without unnecessary delays.

Heavy-Duty Durability

Our Diesel Pro aftermarket gaskets are designed for long-lasting performance across marine, industrial, and heavy-duty on-road applications . Manufactured to withstand extreme pressure, heat, and vibration, these gaskets help your Caterpillar 3406 maintain proper sealing for thousands of operating hours. This durability not only improves reliability but also reduces the frequency of costly repairs and unexpected breakdowns.

Expert Support

Choosing the right gasket is only part of the equation. Correct installation and maintenance are equally important. That’s why our team of Caterpillar specialists provides expert technical support every step of the way. From identifying the right gasket set for an in-frame repair to offering torque specifications and installation best practices, our experts make sure you get the guidance needed to keep your 3406 engine running at peak performance.