Caterpillar 3304B Marine Engine Parts & Spares
Alfa Marine Spare Parts supplies Caterpillar 3304B 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 3304B parts, subject to availability, for scheduled maintenance, engine repairs, top-end overhaul and major engine rebuild requirements.
Our sourcing capabilities cover fuel injection components, fuel injectors, 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 3304B is an inline four-cylinder four-stroke diesel engine belonging to Caterpillar's 3300 Series and has documented marine-engine applications.
For the related earlier engine, visit our Caterpillar 3304 Marine Engine Parts page.
You can also browse our Caterpillar Marine Engine Parts & Rebuild Kits and 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 3304B component? Request a Quote or email request@alfamarinespareparts.com.
Caterpillar 3304B Marine Engine Overview
The Caterpillar 3304B is the four-cylinder configuration within Caterpillar's long-running 3300 Series diesel-engine family.
The engine uses conventional heavy-duty diesel architecture and was produced for marine and other applications.
Caterpillar continues to maintain a dedicated 3304B Marine Engine equipment record and parts catalogue, making the 3304B a valid individual model for a marine-engine parts catalogue.
The wider 3304 platform belongs to approximately the 7-litre displacement class.
Individual 3304B engines can differ according to:
- Engine serial number
- Serial-number prefix
- Arrangement number
- Power rating
- Rated engine speed
- Aspiration
- Fuel-system arrangement
- Cooling-system configuration
- Marine installation
- Accessory equipment
- Production revision
Because the 3304B is a legacy engine with multiple configurations, replacement components should always be identified against the individual engine.
Caterpillar 3304B Technical OverviewSpecificationCaterpillar 3304BManufacturerCaterpillarEngine model3304BEngine familyCaterpillar 3300 SeriesEngine type4-stroke dieselCylinder configurationInlineNumber of cylinders4Displacement classApprox. 7 LFuel systemMechanical, configuration dependentAspirationConfiguration dependentCoolingMarine configuration dependentApplicationsMarine and other heavy-duty applicationsParts identificationSerial number and arrangement dependent
Exact power, rated speed, aspiration, fuel equipment and cooling-system components depend on the individual 3304B arrangement.
For parts sourcing, the engine serial number and arrangement number are more reliable than selecting components using only the 3304B model designation.
Caterpillar 3304B Marine Engine Parts
Alfa Marine Spare Parts can assist with a broad selection of Caterpillar 3304B engine parts for routine maintenance, corrective repairs and planned overhaul work.
Parts categories include:
- Cylinder-head components
- Pistons and piston rings
- Cylinder liners
- Connecting rods
- Crankshaft components
- Bearings
- Fuel injection components
- Fuel injectors
- Fuel pumps
- Governor components
- Turbocharger components where applicable
- Cooling-system parts
- Lubrication-system components
- Intake and exhaust components
- Electrical parts
- Gaskets and seals
- Overhaul components
You can also browse our Marine Spare Parts Catalogue.
Caterpillar 3304B 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
For top-end repairs or cylinder-head overhaul requirements, provide the engine serial number and existing component numbers whenever available.
Caterpillar 3304B Pistons & Cylinder Parts
Internal-engine requirements can include:
- Pistons
- Piston rings
- Piston pins
- Cylinder liners
- Cylinder-liner seals
- Connecting rods
- Connecting-rod bushings
- Main bearings
- Connecting-rod bearings
- Thrust components
- Crankshaft components
- Gaskets
- O-rings
- Seals
Piston, liner and bearing components should always be verified against the individual engine arrangement before ordering.
Caterpillar 3304B Cylinder Liners
Cylinder-liner requirements can include:
- Cylinder liners
- Liner sealing components
- O-rings
- Associated gaskets
- Piston and liner components
- Overhaul components
When preparing a major overhaul requirement, provide the complete engine serial number together with any existing piston and liner part numbers.
Caterpillar 3304B Fuel Injection Parts
The Caterpillar 3304B uses mechanical diesel fuel-system equipment, 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
- Seals
Because the 3304B was produced in different configurations, fuel-system components should always be identified against the individual engine.
Caterpillar 3304B Fuel Injectors
For Caterpillar 3304B injector requirements, provide:
Engine model: Caterpillar 3304B
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 3304B Fuel Injection Pump Parts
Fuel injection pump requirements can include:
- Complete fuel injection pumps
- Pump elements
- Plungers
- Barrels
- Delivery components
- Governor components
- Fuel-control components
- Seals
- Gaskets
- Related hardware
For complete injection-pump requirements, send photographs of the existing pump identification plate together with the engine serial number.
Caterpillar 3304B Governor Parts
The mechanical governor is an important part of applicable 3304B fuel-system configurations.
Governor requirements can include:
- Complete governor assemblies
- Governor components
- Linkage components
- Springs
- Control components
- Seals
- Gaskets
- Related hardware
Caterpillar parts records continue to identify governor components specifically compatible with the 3304B Marine Engine.
Always verify the existing governor number before ordering.
Caterpillar 3304B Turbocharger Parts
Turbocharger requirements depend on the individual 3304B engine configuration.
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 3304B uses the same turbocharger arrangement.
Provide the engine serial number and existing turbocharger number whenever available.
Caterpillar 3304B 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 arrangements can differ substantially from industrial and generator 3304B configurations.
Always specify 3304B Marine Engine when requesting cooling-system components.
Caterpillar 3304B Sea Water Pump Parts
Depending on the marine installation, sea-water pump 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
Clear photographs of the existing pump can assist when the original part number is unavailable.
Caterpillar 3304B Jacket-Water Pump Parts
Jacket-water pump requirements can include:
- Complete water pumps
- Pump housings
- Impellers
- Pump shafts
- Bearings
- Mechanical seals
- Gaskets
- O-rings
- Repair components
Correct water-pump components should be selected according to the individual engine arrangement.
Caterpillar 3304B 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
The vessel's cooling-system arrangement should be considered when identifying heat-exchanger components.
Caterpillar 3304B 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 lubrication-system components should be verified using the engine serial number and arrangement.
Caterpillar 3304B 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 3304B 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 identified against the individual engine arrangement.
Caterpillar 3304B 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 arrangements can vary according to vessel installation.
Caterpillar 3304B 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 electrical components, verify:
- Engine serial number
- Existing part number
- System voltage
- Mounting arrangement
- Electrical connections
Caterpillar 3304B 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 supplied together with associated overhaul components.
Caterpillar 3304B Overhaul Parts
For a Caterpillar 3304B 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
- Governor components
- Turbocharger components where applicable
- Cooling-system parts
- Water pumps
- Oil pumps
- Oil cooler components
- Gaskets
- O-rings
- Seals
For complete overhaul requirements, send the engine identification together with the required parts list.
Caterpillar 3304B 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, service history and inspection results.
Caterpillar 3304B Marine Applications
Caterpillar maintains a dedicated 3304B Marine Engine equipment dashboard and parts catalogue.
Depending on engine configuration and vessel installation, legacy 3304B engines can be encountered in applications such as:
- Commercial vessels
- Fishing vessels
- Workboats
- Auxiliary installations
- Marine generator installations
- Other marine machinery applications
Because Caterpillar also produced the 3304B platform for non-marine applications, always specify that the requirement is for a 3304B Marine Engine.
Caterpillar 3304 vs 3304B
The Caterpillar 3304 and 3304B are closely related but should be maintained as separate catalogue pages.
Both belong to Caterpillar's 3300 Series and use four-cylinder architecture.
However, differences can exist in:
- Fuel-system components
- Injection equipment
- Governor components
- Cylinder-head parts
- Internal engine components
- Turbocharger arrangements
- Cooling-system components
- Gaskets and seals
- Accessory equipment
- Production revisions
Caterpillar parts records explicitly identify components that fit both 3304 and 3304B marine applications, while other components are specific to one configuration.
This is why interchangeability should be verified by serial number rather than assumed.
For the earlier model, visit our Caterpillar 3304 Marine Engine Parts page.
Caterpillar 3304B vs 3306B
The 3304B and 3306B belong to the same wider 3300 engine family, but they use different cylinder configurations.
The 3304B is the four-cylinder member, while the 3306B is a six-cylinder engine.
This affects:
- Engine displacement
- Crankshaft
- Camshaft
- Cylinder components
- Fuel-system components
- Internal engine parts
- Gaskets
- Cooling requirements
- Overhaul components
They should always be maintained as separate engine catalogue pages.
Caterpillar 3304B Parts Identification
Correct parts identification is especially important with legacy engines because individual units may have been rebuilt, modified or fitted with updated components during their operating life.
When requesting parts, provide:
Engine model: Caterpillar 3304B
Application: Marine
Engine serial number:
Serial-number prefix:
Arrangement number:
Existing part number:
Part description:
Quantity:
For pumps, fuel injection equipment, governors, turbochargers, starters and alternators, clear photographs of the existing component can also assist with identification.
The preferred identification sequence is:
Caterpillar 3304B Marine + Engine Serial Number + Arrangement Number + Existing Part NumberWhy Source Caterpillar 3304B 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 3304B marine engine parts and spares.
Depending on availability, we can assist with:
- Maintenance parts
- Fuel injectors
- Fuel injection components
- Governor components
- Cylinder-head components
- Pistons and cylinder liners
- Internal engine parts
- Turbocharger components where applicable
- Cooling-system parts
- Sea water pumps
- Jacket-water pumps
- Heat exchanger components
- Lubrication-system components
- Electrical parts
- Top-end overhaul components
- Complete overhaul requirements
- Genuine parts
- OEM parts
- Replacement parts
- Applicable Reman parts
For the related earlier engine, visit our Caterpillar 3304 Marine Engine Parts page.
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 3304B a Marine Engine?
Yes. Caterpillar currently maintains a dedicated 3304B Marine Engine equipment dashboard and parts catalogue.
How Many Cylinders Does the Caterpillar 3304B Have?
The Caterpillar 3304B is an inline four-cylinder diesel engine.
What Is the Caterpillar 3304B Displacement?
The 3304B belongs to approximately the 7-litre engine class.
Does the Caterpillar 3304B Use Mechanical Fuel Injection?
Applicable legacy 3304B diesel configurations use mechanical fuel-injection and governor equipment. Exact components depend on the individual engine arrangement.
Is the Caterpillar 3304B the Same as the 3304?
No. They are closely related 3300 Series engines, but they should be treated as separate models for parts identification.
Can Some 3304 and 3304B Parts Be the Same?
Yes. Caterpillar records show some components with compatibility across both 3304 and 3304B marine engines.
However, this does not mean all components are interchangeable.
Can You Supply Caterpillar 3304B Fuel Injection Parts?
Yes. We can assist with applicable injectors, nozzles, fuel injection pump components, governor components, transfer pumps and other fuel-system requirements.
Can You Supply Caterpillar 3304B Cylinder Liners and Pistons?
Yes. Depending on engine configuration and availability, we can assist with cylinder liners, pistons, piston rings, pins and associated overhaul components.
Can You Supply Caterpillar 3304B Sea Water Pumps?
Yes. We can assist with applicable sea water pumps and other cooling-system components.
Provide the engine serial number and existing pump number whenever available.
Can You Supply Caterpillar 3304B 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
Caterpillar 3304 Marine Engine Parts
Caterpillar 3116 Marine Engine Parts
Caterpillar 3126 Marine Engine Parts
Caterpillar 3208 Marine Engine Parts
Caterpillar 3406 Marine Engine Parts
Caterpillar 3408 Marine Engine Parts
Caterpillar 3412 Marine Engine Parts
Caterpillar Marine Engine Parts & Rebuild Kits
Caterpillar Engine Parts Catalogue
Request Caterpillar 3304B Marine Engine Parts
Looking for Caterpillar 3304B marine engine parts, maintenance spares or overhaul components?
Send us:
Engine model: Caterpillar 3304B
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
For the related engine, visit our Caterpillar 3304 Marine Engine Parts page.
You can also browse our Caterpillar Marine Engine Parts & Rebuild Kits.
Worldwide supply of Caterpillar 3304B parts for commercial vessels, fishing vessels, workboats, shipyards, marine repair companies and engine rebuilders.