Parts for Caterpillar 3406E – Gasket Section

The Caterpillar 3406E engine is one of the most widely recognized heavy-duty diesel engines ever produced, known for its performance in on-highway trucks, industrial machinery, and marine applications. A key factor in keeping this engine reliable is the integrity of its gasket systems. Gaskets create critical seals between engine components, preventing oil, coolant, fuel, and combustion gases from leaking into areas where they don’t belong.

Below is a detailed breakdown of gasket components and kits available for the Caterpillar 3406E engine. Each section explains the function of the part, its application, and why Diesel Pro Power provides the most trusted aftermarket option worldwide.

In-Frame Gasket Set for Caterpillar 3406E Engines

When performing an in-frame repair, the engine remains mounted in the chassis. This type of rebuild typically addresses wear issues without removing the entire engine. An in-frame gasket set for the 3406E includes all the essential seals and gaskets required to disassemble, repair, and reseal critical areas like the cylinder head, oil pan, intake, and exhaust systems.

Using a complete set ensures that no worn gasket is overlooked, which could otherwise cause oil or coolant leaks and reduce the life of the rebuild. Diesel Pro aftermarket in-frame sets are engineered for heavy-duty use, minimizing downtime and extending service intervals.

Cylinder Head Spacer Plate for Caterpillar 3406E Engines

The spacer plate sits between the engine block and the cylinder head. It provides a smooth surface for the cylinder head gasket to seal against, compensates for minor imperfections, and ensures even distribution of combustion pressure.

Over time, heat and compression can warp or damage the plate. Replacing it during an overhaul prevents premature head gasket failure. Diesel Pro Power supplies heavy-duty aftermarket spacer plates designed to handle the extreme temperatures and pressures of Caterpillar 3406E operation.

Cylinder Head Gasket Kit for Caterpillar 3406E Engines

A cylinder head gasket kit provides the seals necessary to reinstall the head after maintenance or rebuild. The 3406E’s head gasket is one of the most critical seals in the entire engine, keeping coolant, oil, and combustion gases in their proper paths.

Failure of this gasket can lead to overheating, coolant entering combustion chambers, or loss of compression. A complete kit from Diesel Pro Power ensures you have not just the gasket itself, but all supporting seals and hardware to do the job right the first time.

Overhaul Gasket Set for Caterpillar 3406E Engines

An overhaul gasket set is used for a complete rebuild when the engine is removed from service. This comprehensive package includes every gasket and seal necessary for full disassembly and reassembly of the 3406E.

Diesel Pro aftermarket overhaul sets are manufactured for long-term durability, helping operators extend engine life after a major rebuild. Whether for trucking fleets, marine applications, or industrial power units, this set ensures no sealing component is overlooked.

Flywheel Housing Gasket for Caterpillar 3406E

The flywheel housing gasket seals the joint between the flywheel housing and the rear of the engine block. This prevents oil leakage around the rear main area and keeps contaminants out of the housing.

Because the flywheel housing endures vibration and torque transfer, maintaining a strong seal is essential for reliable operation. Diesel Pro provides aftermarket gaskets with superior resistance to compression set, ensuring long-lasting performance.

Cylinder Head Gasket for Caterpillar 3406E Engines

The individual cylinder head gasket provides the seal between the cylinder head and the block. For the 3406E, it is designed to withstand extreme combustion pressures while keeping coolant and oil passages sealed.

Installing a fresh head gasket during rebuilds prevents blow-by and fluid leaks, which could otherwise cause catastrophic damage. Diesel Pro Power’s aftermarket gaskets meet strict specifications for thermal expansion and pressure resistance.

Aftercooler Gasket for Caterpillar 3406E

The aftercooler gasket seals the connections between the aftercooler and adjacent engine components. On a turbocharged engine like the 3406E, the aftercooler reduces intake air temperature for better combustion efficiency.

Leaks at this junction can cause reduced power, unfiltered air entry, and increased exhaust temperatures. High-quality aftermarket gaskets from Diesel Pro ensure airtight sealing, preserving turbocharger and engine performance.

Oil Pan Gasket for Caterpillar 3406E

The oil pan gasket provides the critical seal between the oil pan and the lower engine block. It prevents leaks that could lead to low oil levels and engine damage.

Given the 3406E’s demanding applications, oil pan gaskets are designed to handle high vibration, constant oil exposure, and repeated heating and cooling cycles. Diesel Pro aftermarket options offer enhanced resilience for long-haul reliability.

Front Housing Gasket for Caterpillar 3406E

The front housing gasket seals the engine front cover, which encloses timing gears and accessory drives. A reliable seal prevents oil leaks and ensures that internal components remain lubricated and protected.

Because the front housing area is constantly exposed to vibration and oil pressure, a durable gasket is critical. Diesel Pro Power’s aftermarket solutions are built to OEM standards of fit and reliability.

Exhaust Manifold Gasket for Caterpillar 3406E

The exhaust manifold gasket seals the interface between the cylinder head and exhaust manifold. It ensures that hot exhaust gases are directed through the turbocharger and out of the exhaust system without leaking into the engine bay.

Exhaust leaks reduce efficiency and can cause overheating of nearby components. Diesel Pro aftermarket gaskets are built with heat-resistant materials, extending service life under extreme thermal cycling.

Turbocharger Gasket for Caterpillar 3406E

The turbocharger gasket provides the seal at the turbo mounting flange, ensuring that exhaust gases drive the turbine efficiently. Even minor leaks can reduce turbo performance and cause excessive soot buildup.

A reliable aftermarket turbo gasket from Diesel Pro Power ensures consistent boost, optimal fuel efficiency, and reduced emissions.

Additional Front Housing Gasket for Caterpillar 3406E

Some 3406E models require a second gasket for the front housing, depending on configuration. Like the primary gasket, this seal prevents oil leaks and ensures reliable function of the timing and accessory drive systems.

Diesel Pro’s aftermarket gaskets are precision-engineered to handle the rigors of continuous operation in trucking, marine, and industrial engines.

Cylinder Head Gasket for Caterpillar 3406E, C15 & C18 Engines

This version of the head gasket is designed for compatibility not only with the 3406E but also with C15 and C18 engines. While interchangeable in some applications, it maintains the same critical sealing performance.

Diesel Pro Power ensures that cross-application gaskets meet Caterpillar standards, giving operators flexibility without sacrificing reliability.

Valve Cover Gasket for Caterpillar 3406E Engines

The valve cover gasket seals the joint between the valve cover and cylinder head. It keeps oil inside the rocker area and prevents dirt from entering.

On engines like the 3406E, where rocker arms, injectors, and valves operate under constant motion, a durable seal is vital. Diesel Pro aftermarket gaskets reduce the risk of oil leaks around the top end of the engine.

Thermostat Gasket for Caterpillar 3406E

The thermostat gasket ensures coolant remains sealed within the thermostat housing, preventing leaks and maintaining proper engine temperature control.

A leaking thermostat gasket can cause overheating, coolant loss, or inefficient operation. Diesel Pro aftermarket solutions provide reliable temperature regulation for consistent performance.

Additional Spacer Plate for Caterpillar 3406E Engines

Some rebuilds require a specific spacer plate designed exclusively for the 3406E. Like the earlier spacer plate described, it helps provide a uniform sealing surface between the block and head.

Diesel Pro aftermarket spacer plates are engineered for precision fit and long service life.

Front Crankshaft Seal for Caterpillar 3406E

The front crankshaft seal prevents oil from leaking around the crankshaft snout as it exits the front cover. Because the crankshaft rotates at high speed, this seal must withstand continuous friction.

A high-quality aftermarket seal ensures oil retention and protects belts and pulleys from contamination.

Rear Crankshaft Seal for Caterpillar 3406E

The rear crankshaft seal provides the same protection as the front, but at the rear main bearing. Oil leaks in this area are especially problematic, as they can contaminate the flywheel and clutch assembly.

Diesel Pro aftermarket rear seals are designed with advanced lip materials for superior oil control under demanding loads.

Why Choose Diesel Pro Power for Caterpillar 3406E Gasket Parts

Global Trust

With over 40,000 satisfied customers across 180+ countries, Diesel Pro Power is the worldwide leader in aftermarket Caterpillar engine support.

Fast Shipping

All gasket orders for the 3406E ship within 24 hours, complete with tracking, minimizing downtime for operators.

Engine-Specific Catalogs

Unlike generic suppliers, Diesel Pro Power provides engine-specific catalogs, ensuring every part listed is engineered for the Caterpillar 3406E.

Heavy-Duty Durability

Our aftermarket gaskets and seals are built for extreme conditions in trucking, marine, and industrial environments.

Expert Support

Diesel Pro’s Caterpillar specialists provide technical guidance on installation, maintenance, and troubleshooting, helping operators extend engine life and reduce costs.