Cummins 6C Engine Parts – Gasket Section

The Cummins 6C engine relies on a variety of precision gaskets to ensure proper sealing of its cooling, lubrication, intake, exhaust, and combustion systems. Each gasket is engineered to handle the heat, pressure, and vibration unique to the 6C’s operation, whether in marine or industrial service.

Below is a complete breakdown of gasket options available for the Cummins 6C engine.

Marine Water Pump Gaskets & Seals

Gasket to Mount the Marine Water Pump

This gasket securely mounts the marine water pump to the 6C engine, ensuring a tight seal that prevents seawater leaks and maintains proper pump alignment. Built from durable materials designed for saltwater exposure.

Marine Water Pump O-Ring – Inlet and Outlet Ports

This O-ring seals the inlet and outlet ports of the 6C marine water pump. Two are used per engine—one at the inlet and one at the outlet—to keep the raw water system fully sealed and prevent loss of cooling efficiency.

Heat Exchanger Gasket

Heat Exchanger Gasket – 5” Diameter

A 5-inch diameter gasket designed for the 6C engine’s heat exchanger. It provides a watertight seal to prevent coolant leaks and ensures efficient heat transfer.

Engine Gasket Sets

Upper Gasket Set – Standard

Designed for engines with 450 HP and below, this set contains all major gaskets for the upper section of the 6C engine, including the cylinder head gasket, intake and exhaust manifold gaskets, and other related seals.

Lower Gasket Set

Complete set of gaskets for the lower portion of the 6C engine. Used for sealing the oil pan, gear housing, and other lower-engine components.

Cylinder Head Gasket

Standard Head Gasket

Built for engines with 230 HP and below, this head gasket forms the primary seal between the cylinder head and block, preventing leaks of combustion gases and coolant.

Intake & Exhaust System Gaskets

Exhaust Manifold Gasket

Six are used per 6C engine to seal the exhaust manifold to the cylinder head, preventing gas leaks and maintaining exhaust flow.

Turbo Mounting Gasket – For Water-Cooled Turbos Only

This gasket seals the turbocharger mounting surface on water-cooled 6C turbo setups, maintaining pressure and preventing exhaust leakage.

Exhaust Manifold Outlet Connection Gasket

Seals the outlet connection of the 6C exhaust manifold to prevent leakage at the exhaust exit.

Intake Manifold Cover Gasket

Ensures the intake manifold cover on the 6C is sealed to prevent unmetered air from entering the system.

Intake Connection Gasket

Seals the connection between the intake manifold and the adjoining intake piping on the 6C engine.

Valve Train & Cover Gaskets

Valve Cover Gasket

Prevents oil leaks from the top of the cylinder head on the 6C engine while protecting the valve train from dirt and debris.

Fuel System Gaskets

Fuel Transfer Pump Gasket

Two are used per fuel pump on the 6C engine to ensure leak-free operation of the fuel transfer pump.

Lubrication System Gaskets

Oil Cooler Gasket

Seals the 6C engine’s oil cooler to prevent oil and coolant from mixing.

Oil Cooler Cover Gasket – Outer

Gasket for sealing the outer oil cooler cover plate on the 6C engine.

Oil Cooler Cover Gasket – Inner

Inner gasket for the oil cooler cover on the 6C, providing a tight seal against fluid leakage.

Gear Housing & Rear Cover Gaskets

Rear Cover Gasket

Seals the rear cover plate on the 6C engine to maintain oil containment.

Gear Housing Gasket

Seals the 6C gear housing to prevent oil leaks around the front accessory drive components.

Gear Cover Gasket

Forms a secure seal on the gear cover of the 6C to keep oil in and contaminants out.

Cooling System Gaskets & Seals

Engine Water Pump Seal

Seals the fresh water pump on the 6C engine to prevent coolant leakage.

Thermostat Gasket

Gasket for sealing the thermostat housing to the cylinder head on the 6C engine.

Gasket Sealants & Adhesives

Gasket Spray – High Tack Sealant

A high tack spray sealant for holding and sealing cut gaskets on the 6C engine. Available for ground shipping in the USA and Canada.

3H Gasket Maker

Liquid sealant for creating or reinforcing gaskets on the 6C. Available for ground shipping in the USA and Canada.

High Strength Threadlocker – Red

Locks threaded fasteners on the 6C to prevent loosening under vibration.

Gasket Maker – Silicone Sensor Safe

Sensor-safe silicone gasket maker for sealing parts on the 6C without damaging sensitive components.

J-B Weld – Cold Weld

Cold weld compound for permanent repairs on metal components of the 6C engine.

Gasket Maker – Silicone High-Temp RTV

High temperature silicone RTV gasket maker for 6C applications exposed to extreme heat.

Gasket Maker – Ultra Blue RTV Silicone Sensor Safe

Flexible, sensor-safe silicone sealant for the 6C.

Gasket Maker – Non-Hardening Pliable Sealant

Flexible sealant that remains pliable, ideal for vibration-prone areas on the 6C engine.