Caterpillar 3304 Marine Engine Parts & Spares
Alfa Marine Spare Parts supplies Caterpillar 3304 marine engine parts and spares for commercial vessels, fishing vessels, workboats, auxiliary engines, marine generator applications and other vessel installations.
We source genuine, OEM, replacement and applicable Reman Caterpillar 3304 parts, subject to availability, for scheduled maintenance, engine repairs, top-end overhaul and major engine rebuild requirements.
Our sourcing capabilities cover fuel injection components, cylinder heads, pistons, piston rings, cylinder liners, connecting rods, bearings, turbocharger components where applicable, sea water pumps, jacket-water pumps, heat exchangers, oil pumps, oil coolers, starters, alternators, gaskets, seals and overhaul components.
The Caterpillar 3304 is a four-cylinder diesel engine from Caterpillar's long-running 3300 Series and has documented marine-engine applications.
For other Caterpillar engines, visit our Caterpillar Marine Engine Parts & Rebuild Kits page.
You can also browse our Caterpillar Engine Parts Catalogue.
For correct parts identification, provide the complete engine model, engine serial number, serial-number prefix, arrangement number and existing part number whenever available.
Need a specific Caterpillar 3304 component? Request a Quote or email request@alfamarinespareparts.com.
Caterpillar 3304 Marine Engine Overview
The Caterpillar 3304 is a four-cylinder four-stroke diesel engine belonging to Caterpillar's 3300 Series.
The engine was produced for several applications, including documented marine-engine installations.
The 3304 platform is known for its conventional heavy-duty mechanical diesel architecture and continues to operate in older commercial and marine equipment around the world.
Because the Caterpillar 3304 was produced in different arrangements and applications, individual engines can differ according to:
- Engine serial number
- Serial-number prefix
- Arrangement number
- Naturally aspirated or turbocharged configuration
- Power rating
- Rated speed
- Fuel-system arrangement
- Cooling-system configuration
- Marine installation
- Accessory equipment
- Production revision
This makes correct engine identification particularly important when sourcing parts for an older 3304.
Caterpillar 3304 Technical OverviewSpecificationCaterpillar 3304ManufacturerCaterpillarEngine model3304Engine familyCaterpillar 3300 SeriesEngine type4-stroke dieselCylinder configurationInlineNumber of cylinders4Displacement classApprox. 7.0 LFuel systemMechanical, configuration dependentAspirationNaturally aspirated or turbocharged depending on configurationCoolingApplication and installation dependentApplicationsMarine and other heavy-duty applicationsParts identificationSerial number and arrangement dependent
Exact power output, rated speed, aspiration, cooling equipment and accessory arrangement vary according to the individual 3304 configuration.
For this reason, Alfa Marine Spare Parts recommends identifying components using the engine serial number and arrangement number, rather than ordering by the 3304 model designation alone.
Caterpillar 3304 Marine Engine Parts
Alfa Marine Spare Parts can assist with a broad selection of Caterpillar 3304 engine parts for routine maintenance, repairs and overhaul work.
Parts categories can include:
- Cylinder components
- Internal engine parts
- Fuel injection components
- Fuel pumps
- Turbocharger components where applicable
- Cooling-system components
- Lubrication-system parts
- Intake and exhaust components
- Electrical parts
- Gaskets and seals
- Maintenance components
- Overhaul parts
You can also browse our Marine Spare Parts Catalogue.
Caterpillar 3304 Cylinder Head Parts
Cylinder-head requirements can include:
- Complete cylinder heads
- Intake valves
- Exhaust valves
- Valve guides
- Valve seats
- Valve springs
- Rocker arms
- Rocker shafts
- Push rods
- Valve covers
- Cylinder-head gaskets
- Sealing components
- Fasteners
Older engines may have undergone previous repairs or component updates.
For this reason, provide the existing cylinder-head or component number whenever available.
Caterpillar 3304 Pistons & Cylinder Parts
Internal-engine requirements can include:
- Pistons
- Piston rings
- Piston pins
- Cylinder liners
- Liner seals
- Connecting rods
- Connecting-rod bushings
- Main bearings
- Connecting-rod bearings
- Thrust components
- Crankshaft components
- Gaskets
- O-rings
- Seals
Correct piston, liner and bearing identification is particularly important during a complete engine overhaul.
Caterpillar 3304 Cylinder Liners
Cylinder-liner requirements can include:
- Cylinder liners
- Liner sealing components
- O-rings
- Associated gaskets
- Piston and liner combinations
- Overhaul components
When preparing an overhaul requirement, send the complete engine serial number together with any existing piston and liner part numbers.
Caterpillar 3304 Fuel Injection Parts
The Caterpillar 3304 uses a mechanical diesel fuel-injection system, with individual components dependent on the engine arrangement.
Fuel-system requirements can include:
- Fuel injection pumps
- Fuel injectors
- Injector nozzles
- Fuel transfer pumps
- Fuel filters
- Fuel lines
- Fuel fittings
- Fuel priming components
- Fuel shutoff components
- Governor components
- Fuel-system gaskets
- O-rings and seals
Because the 3304 was produced over a long period, fuel-system components should always be identified against the individual engine.
Caterpillar 3304 Fuel Injectors
For Caterpillar 3304 injector requirements, provide:
Engine model: Caterpillar 3304
Application: Marine
Engine serial number:
Serial-number prefix:
Arrangement number:
Existing injector or nozzle number:
Quantity:
This information helps identify the correct injector or nozzle specification and any applicable replacement reference.
Caterpillar 3304 Fuel Injection Pump Parts
Injection-pump requirements can include:
- Complete fuel injection pumps
- Pump elements
- Plungers
- Barrels
- Delivery valves
- Governor components
- Fuel-control components
- Seals
- Gaskets
- Related hardware
For complete injection-pump requirements, provide photographs of the pump identification plate together with the engine serial number.
Caterpillar 3304 Turbocharger Parts
Some Caterpillar 3304 configurations use turbocharging, while other configurations are naturally aspirated.
For applicable turbocharged engines, requirements can include:
- Complete turbochargers
- Turbocharger cartridges
- Compressor components
- Turbine components
- Bearings
- Seals
- Oil-feed components
- Oil-return components
- Intake connections
- Exhaust connections
- Mounting gaskets
Do not assume every Caterpillar 3304 uses a turbocharger.
Always verify the exact engine arrangement before ordering.
Caterpillar 3304 Cooling System Parts
Marine cooling-system requirements can include:
- Sea water pumps
- Raw-water pumps
- Jacket-water pumps
- Heat exchangers
- Oil coolers
- Thermostats
- Thermostat housings
- Cooling pipes
- Hoses
- Pump shafts
- Bearings
- Mechanical seals
- Gaskets
- O-rings
Marine cooling components can differ substantially from industrial 3304 arrangements.
Always specify that the engine is installed in a marine application when requesting cooling-system components.
Caterpillar 3304 Sea Water Pump Parts
Depending on the marine installation, requirements can include:
- Complete sea water pumps
- Raw-water pumps
- Pump housings
- Pump shafts
- Impellers
- Mechanical seals
- Bearings
- Covers
- Gaskets
- O-rings
- Repair components
Correct pump identification can depend on:
- Engine serial number
- Arrangement number
- Existing pump number
- Cooling-system configuration
- Vessel installation
Photographs of the existing pump are useful when the original part number cannot be identified.
Caterpillar 3304 Jacket-Water Pump Parts
Jacket-water pump requirements can include:
- Complete water pumps
- Pump housings
- Impellers
- Pump shafts
- Bearings
- Seals
- Gaskets
- O-rings
- Repair components
Correct pump components should be selected according to the individual engine arrangement.
Caterpillar 3304 Heat Exchanger Parts
Applicable marine heat-exchanger requirements can include:
- Complete heat exchangers
- Heat exchanger cores
- End covers
- Gaskets
- O-rings
- Seals
- Cooling connections
- Mounting components
Cooling arrangements can differ according to vessel installation, so the engine model alone may not identify every heat-exchanger component.
Caterpillar 3304 Oil Pump & Lubrication Parts
Lubrication-system requirements can include:
- Engine oil pumps
- Oil filters
- Oil coolers
- Oil-pressure regulators
- Oil-pressure switches
- Oil lines
- Oil-pan components
- Crankshaft seals
- Gaskets
- O-rings
Correct oil pressure and lubrication are essential for protecting the crankshaft, bearings, pistons, camshaft and applicable turbocharger components.
Caterpillar 3304 Crankshaft & Bearing Parts
Crankshaft and bearing requirements can include:
- Crankshafts
- Main bearings
- Connecting-rod bearings
- Thrust components
- Connecting rods
- Connecting-rod bushings
- Crankshaft seals
- Crankshaft gears
- Vibration-damper components
- Associated hardware
For major internal-engine requirements, provide:
Engine Serial Number + Arrangement Number + Existing Part NumberCaterpillar 3304 Camshaft & Timing Parts
Timing-system requirements can include:
- Camshafts
- Camshaft bearings
- Camshaft gears
- Timing gears
- Gear-train components
- Bushings
- Covers
- Fasteners
- Gaskets
- Seals
Correct timing components should always be checked against the individual engine arrangement.
Caterpillar 3304 Intake & Exhaust Parts
Intake and exhaust requirements can include:
- Intake manifolds
- Exhaust manifolds
- Air-intake components
- Exhaust elbows
- Turbocharger connections where applicable
- Exhaust connections
- Gaskets
- Seals
- Clamps
- Mounting hardware
Marine exhaust components can differ according to vessel installation and cooling arrangement.
Caterpillar 3304 Starter & Alternator Parts
Electrical requirements can include:
- Starter motors
- Starter solenoids
- Alternators
- Charging-system components
- Oil-pressure switches
- Temperature senders
- Gauges
- Wiring
- Electrical connectors
Before ordering, verify:
- Engine serial number
- Existing part number
- System voltage
- Mounting arrangement
- Electrical connections
Caterpillar 3304 Gaskets & Seals
Gasket and sealing requirements can include:
- Cylinder-head gaskets
- Valve-cover gaskets
- Intake-manifold gaskets
- Exhaust-manifold gaskets
- Turbocharger gaskets where applicable
- Oil-pan gaskets
- Water-pump gaskets
- Crankshaft seals
- Oil seals
- Fuel-system seals
- O-rings
- Cylinder-liner seals
Complete gasket requirements can also be prepared together with overhaul components.
Caterpillar 3304 Overhaul Parts
For a Caterpillar 3304 engine overhaul, Alfa Marine Spare Parts can assist with applicable:
- Pistons
- Piston rings
- Piston pins
- Cylinder liners
- Liner seals
- Cylinder-head components
- Intake valves
- Exhaust valves
- Connecting rods
- Main bearings
- Connecting-rod bearings
- Thrust components
- Crankshaft parts
- Camshaft parts
- Fuel injectors
- Fuel injection components
- Turbocharger components where applicable
- Water pumps
- Oil pumps
- Oil cooler components
- Gaskets
- O-rings
- Seals
For complete overhaul requirements, send the engine serial number together with the required parts list.
Caterpillar 3304 Top-End Overhaul Parts
Top-end overhaul requirements can include:
- Cylinder-head components
- Intake valves
- Exhaust valves
- Valve guides
- Valve seats
- Valve springs
- Rocker components
- Fuel injectors
- Injector nozzles
- Cylinder-head gaskets
- O-rings
- Seals
The final overhaul scope should be determined according to engine condition, operating history and inspection results.
Caterpillar 3304 Marine Applications
Caterpillar's current Parts Store continues to identify the 3304 as a Marine Engine, confirming the model's historical marine application.
Depending on engine configuration and installation, 3304 engines can be encountered in:
- Commercial vessels
- Fishing vessels
- Workboats
- Auxiliary installations
- Marine generator applications
- Other vessel machinery installations
Because Caterpillar also produced 3304 engines for non-marine equipment, always specify the marine application when requesting parts.
Caterpillar 3304 vs 3304B
The Caterpillar 3304 and Caterpillar 3304B should be treated as separate engine models for parts identification.
Caterpillar maintains separate marine-engine parts listings for:
Caterpillar 3304 Marine Engine
and
Caterpillar 3304B Marine Engine
Although both belong to the 3300 family and share the four-cylinder architecture, differences can affect:
- Fuel-system components
- Fuel injection equipment
- Cylinder-head components
- Internal engine parts
- Turbocharger arrangements
- Cooling-system components
- Gaskets and seals
- Accessory components
- Production revisions
Parts should therefore not automatically be assumed interchangeable.
A dedicated Caterpillar 3304B Marine Engine Parts page should be maintained separately.
Caterpillar 3304 vs 3306
The Caterpillar 3304 and 3306 belong to the same broader 3300 Series but use different cylinder configurations.
The 3304 is the four-cylinder member, while the 3306 is the six-cylinder member.
This affects:
- Engine displacement
- Cylinder components
- Crankshaft
- Camshaft
- Cylinder head
- Fuel-system configuration
- Internal engine parts
- Gaskets
- Overhaul requirements
They should always have separate parts identification and catalogue pages.
Caterpillar 3304 Parts Identification
Correct identification is especially important with legacy Caterpillar engines because individual units may have been rebuilt, repowered or modified during their operating life.
When requesting parts, provide:
Engine model: Caterpillar 3304
Application: Marine
Engine serial number:
Serial-number prefix:
Arrangement number:
Existing part number:
Part description:
Quantity:
For pumps, fuel injection equipment, turbochargers, starters and alternators, photographs of the existing component can also assist with identification.
The preferred identification sequence is:
Caterpillar 3304 Marine + Engine Serial Number + Arrangement Number + Existing Part NumberWhy Source Caterpillar 3304 Parts From Alfa Marine Spare Parts?
Alfa Marine Spare Parts supports shipowners, vessel operators, ship managers, shipyards, marine engineers, purchasing departments, repair companies and engine rebuilders with Caterpillar 3304 marine engine parts and spares.
Depending on availability, we can assist with:
- Maintenance parts
- Fuel injectors
- Fuel injection components
- Cylinder-head components
- Pistons and cylinder liners
- Internal engine parts
- Turbocharger components where applicable
- Cooling-system components
- Sea water pumps
- Jacket-water pumps
- Heat exchanger components
- Lubrication-system parts
- Electrical components
- Top-end overhaul parts
- Complete overhaul requirements
- Genuine parts
- OEM parts
- Replacement parts
- Applicable Reman parts
You can also browse our Caterpillar Marine Engine Parts & Rebuild Kits, Caterpillar Engine Parts Catalogue and Marine Spare Parts Catalogue.
Alfa Marine Spare Parts is an independent marine spare-parts supplier and is not an official Caterpillar dealer.
Frequently Asked QuestionsIs the Caterpillar 3304 a Marine Engine?
Yes. Caterpillar's Parts Store maintains a dedicated 3304 Marine Engine parts catalogue.
How Many Cylinders Does the Caterpillar 3304 Have?
The Caterpillar 3304 is an inline four-cylinder diesel engine.
What Is the Caterpillar 3304 Displacement?
The Caterpillar 3304 belongs to approximately the 7-litre displacement class.
Is the Caterpillar 3304 Mechanically Fuel Injected?
Legacy Caterpillar 3304 diesel configurations use mechanical fuel-injection equipment. Exact components depend on the individual engine arrangement.
Is Every Caterpillar 3304 Turbocharged?
No. Caterpillar 3304 engines were produced in different configurations, including naturally aspirated and applicable turbocharged versions.
Is the Caterpillar 3304 the Same as the 3304B?
No. They are related 3300 Series engines, but Caterpillar maintains separate marine-engine parts listings for the 3304 and 3304B.
Can You Supply Caterpillar 3304 Fuel Injection Parts?
Yes. We can assist with applicable injectors, nozzles, injection-pump components, transfer pumps and other fuel-system requirements.
Can You Supply Caterpillar 3304 Cylinder Liners and Pistons?
Yes. Depending on the engine arrangement and availability, we can assist with cylinder liners, pistons, piston rings, pins and associated overhaul components.
Can You Supply Caterpillar 3304 Sea Water Pumps?
Yes. We can assist with applicable sea water pump and cooling-system requirements. Provide the engine serial number and existing pump number whenever possible.
Can You Supply Caterpillar 3304 Overhaul Parts?
Yes. Depending on availability, we can assist with pistons, rings, liners, bearings, cylinder-head components, fuel-system parts, cooling components, gaskets, seals and other overhaul requirements.
Related Caterpillar Engine Pages
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Caterpillar Marine Engine Parts & Rebuild Kits
Caterpillar Engine Parts Catalogue
Request Caterpillar 3304 Marine Engine Parts
Looking for Caterpillar 3304 marine engine parts, maintenance spares or overhaul components?
Send us:
Engine model: Caterpillar 3304
Application: Marine
Engine serial number:
Serial-number prefix:
Arrangement number:
Existing part number:
Part description:
Quantity:
Required condition: Genuine / OEM / Replacement / Reman where applicable
Delivery destination:
Required date:
If the part number is unknown, include clear photographs of the engine identification plate and existing component.
Email: request@alfamarinespareparts.com
You can also browse our Caterpillar Marine Engine Parts & Rebuild Kits.
Worldwide supply of Caterpillar 3304 parts for commercial vessels, fishing vessels, workboats, shipyards, marine repair companies and engine rebuilders.