Caterpillar 3408B Marine Engine Parts & Spares
Alfa Marine Spare Parts supplies Caterpillar 3408B marine engine parts and spares for commercial vessels, workboats, fishing vessels, tugboats, propulsion systems, auxiliary engines and marine generator applications.
We source genuine, OEM, replacement and applicable Reman Caterpillar 3408B parts, subject to availability, for scheduled maintenance, engine repairs, top-end overhaul and complete engine rebuild requirements.
Our sourcing capabilities cover fuel injectors, fuel injection parts, cylinder heads, pistons, piston rings, cylinder liners, connecting rods, bearings, crankshaft parts, camshaft parts, turbochargers, aftercooler parts, jacket-water pumps, sea water pumps, oil pumps, oil coolers, filters, starters, alternators, gaskets, seals and overhaul parts.
The 3408B belongs to the wider Caterpillar 3400 Series Marine Engine Parts family.
For information about the original V8 platform, visit our Caterpillar 3408 Marine Engine Parts page.
For six-cylinder engines in the same family, visit our Caterpillar 3406 Marine Engine Parts page.
For twelve-cylinder requirements, visit our Caterpillar 3412 Marine Engine Parts page.
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 3408B part? Request a Quote or email request@alfamarinespareparts.com.
Caterpillar 3408B Engine Overview
The Caterpillar 3408B is an eight-cylinder V-configuration, four-stroke diesel engine belonging to Caterpillar's established 3400 Series.
The wider 3408 platform includes:
- Caterpillar 3408
- Caterpillar 3408B
- Caterpillar 3408C
The 3408B represents a distinct generation within this V8 engine platform.
Applicable engines have been used in marine propulsion, auxiliary, generator and other heavy-duty applications.
Although the 3408B shares the general V8 architecture of the wider 3408 family, individual parts can vary according to:
- Engine generation
- Engine serial number
- Serial-number prefix
- Arrangement number
- Power rating
- Fuel-system configuration
- Turbocharger specification
- Cooling arrangement
- Marine installation
- Production revision
For this reason, 3408, 3408B and 3408C parts should not automatically be treated as interchangeable.
For information about the complete engine family, visit our Caterpillar 3400 Series Marine Engine Parts page.
Caterpillar 3408B Technical OverviewSpecificationCaterpillar 3408BManufacturerCaterpillarEngine model3408BEngine familyCaterpillar 3400 SeriesEngine type4-stroke dieselCylinder configurationV8Number of cylinders8Displacement classApprox. 18 LAspirationConfiguration dependentFuel systemConfiguration dependentCooling arrangementApplication dependentApplicationsMarine propulsion, auxiliary and generatorParts identificationSerial number and arrangement dependent
Exact power ratings, operating speed and installed equipment can vary according to the individual 3408B configuration.
For major engine parts, use the engine serial number, serial-number prefix, arrangement number and existing part number for identification.
Caterpillar 3408B Parts & Spares
Alfa Marine Spare Parts can assist with a broad range of Caterpillar 3408B engine parts for routine maintenance, engine repairs and major overhaul work.
Cylinder & Internal Engine Parts
Requirements can include:
- Cylinder heads
- Cylinder liners
- Pistons
- Piston rings
- Piston pins
- Connecting rods
- Connecting-rod bushings
- Main bearings
- Connecting-rod bearings
- Thrust bearings
- Crankshaft parts
- Camshaft parts
- Timing parts
- Gaskets
- O-rings
- Seals
Major internal-engine parts should always be identified against the complete engine configuration.
You can also browse our Marine Spare Parts Catalogue for additional marine engine components.
Caterpillar 3408B Cylinder Head Parts
Cylinder-head requirements can include:
- Complete cylinder heads
- Intake valves
- Exhaust valves
- Valve guides
- Valve seats
- Valve springs
- Rocker parts
- Injector-related parts
- Cylinder-head gaskets
- O-rings
- Seals
- Fasteners
For top-end repairs or complete cylinder-head overhaul requirements, provide the engine serial number together with any existing part numbers.
Caterpillar 3408B Pistons & Cylinder Liners
For engine repair and overhaul work, we can assist with applicable:
- Pistons
- Piston rings
- Piston pins
- Cylinder liners
- Liner seals
- Connecting rods
- Connecting-rod bearings
- Main bearings
- Thrust parts
- Gaskets
- O-rings
Pistons, liners and bearing parts should be confirmed against the individual 3408B engine before ordering.
Caterpillar 3408B Fuel System Parts
Fuel-system requirements can include:
- Fuel injectors
- Fuel nozzles
- Fuel injection parts
- Injection-pump parts
- Fuel transfer pumps
- Fuel priming pumps
- Fuel filters
- Governor parts
- Fuel lines
- Injector seals
- Fuel-system gaskets
- Fittings
Fuel-system components can differ between the 3408, 3408B and 3408C generations.
Whenever possible, provide the existing injector, nozzle or injection-system part number.
Caterpillar 3408B Fuel Injectors & Nozzles
For Caterpillar 3408B injector or nozzle requirements, provide:
Engine model: Caterpillar 3408B
Engine serial number:
Serial-number prefix:
Arrangement number:
Existing injector/nozzle number:
Quantity:
This information is particularly important for older engines where fuel-system parts may have been replaced or superseded during previous maintenance.
Caterpillar 3408B Turbocharger Parts
Applicable Caterpillar 3408B configurations use turbocharging.
Turbocharger requirements can include:
- Complete turbochargers
- Applicable Reman turbochargers
- Turbocharger cartridges
- Turbine parts
- Compressor parts
- Bearings
- Seals
- Oil-feed parts
- Oil-return parts
- Intake connections
- Exhaust connections
- Mounting gaskets
Turbocharger specifications can vary according to engine rating and arrangement.
For correct identification, provide:
Engine Serial Number + Existing Turbocharger Number
A turbocharger used on a 3408 or 3408C should not automatically be assumed suitable for a 3408B.
Caterpillar 3408B Aftercooler Parts
Applicable configurations can use aftercooling within the intake-air system.
Aftercooler requirements can include:
- Aftercooler cores
- Aftercooler housings
- End covers
- Gaskets
- O-rings
- Seals
- Air connections
- Cooling connections
- Mounting parts
Aftercooler configuration should be confirmed against the individual engine and vessel installation.
Caterpillar 3408B Cooling System Parts
Marine cooling requirements can include:
- Jacket-water pumps
- Sea water pumps
- Raw-water pumps
- Heat exchangers
- Aftercooler parts
- Oil coolers
- Thermostats
- Cooling pipes
- Hoses
- Pump shafts
- Mechanical seals
- Bearings
- Gaskets
- O-rings
Cooling arrangements can differ according to engine configuration and vessel installation.
For major cooling-system parts, provide the engine serial number and existing part number whenever available.
Caterpillar 3408B Sea Water Pump Parts
For applicable marine cooling arrangements, we can assist with:
- Complete sea water pumps
- Raw-water pumps
- Impellers
- Pump shafts
- Mechanical seals
- Bearings
- Pump covers
- Pump housings
- Gaskets
- O-rings
- Repair parts
Sea water pump selection can depend on:
- Engine serial number
- Arrangement number
- Cooling configuration
- Vessel installation
- Existing pump number
- Connection arrangement
Do not assume every Caterpillar 3408B marine engine uses the same pump.
Caterpillar 3408B Heat Exchanger Parts
For applicable heat-exchanger-cooled marine installations, requirements can include:
- Heat exchanger assemblies
- Heat exchanger cores
- End covers
- Gaskets
- O-rings
- Seals
- Cooling connections
- Mounting parts
The exact heat exchanger arrangement can vary according to the individual vessel installation.
Caterpillar 3408B Oil Pump & Lubrication Parts
Lubrication-system requirements can include:
- Engine oil pumps
- Oil filters
- Oil coolers
- Oil-pressure regulators
- Oil lines
- Oil-pressure switches
- Crankshaft seals
- Gaskets
- O-rings
Oil pumps and lubrication-system parts should be verified against the complete engine identification.
Caterpillar 3408B Crankshaft & Bearing Parts
Crankshaft and bearing requirements can include:
- Complete crankshaft
- Main bearings
- Connecting-rod bearings
- Thrust bearings
- Connecting rods
- Connecting-rod bushings
- Crankshaft seals
- Crankshaft gears
- Vibration-damper parts
- Associated hardware
For crankshaft enquiries, provide:
Engine serial number + arrangement number + existing crankshaft number
This is particularly important for high-value internal-engine parts.
Caterpillar 3408B Camshaft & Timing Parts
Timing-system requirements can include:
- Camshafts
- Camshaft bearings
- Camshaft gears
- Timing gears
- Gear-train parts
- Covers
- Bushings
- Fasteners
- Gaskets
- Seals
Timing-system parts should be identified against the complete engine arrangement before ordering.
Caterpillar 3408B Air Intake & Exhaust Parts
Air-intake and exhaust requirements can include:
- Intake manifolds
- Exhaust manifolds
- Aftercooler parts
- Turbocharger connections
- Air-intake pipes
- Exhaust connections
- Gaskets
- Seals
- Clamps
- Mounting hardware
The exact arrangement can vary according to engine rating and installation.
Caterpillar 3408B Starter & Alternator Parts
Electrical requirements can include:
- Starter motors
- Starter solenoids
- Alternators
- Charging-system parts
- Temperature switches
- Pressure switches
- Gauges
- Wiring
- Connectors
Before ordering a starter or alternator, verify:
- Engine serial number
- Existing part number
- System voltage
- Mounting arrangement
- Electrical connections
Caterpillar 3408B Gaskets & Seals
Gasket and sealing requirements can include:
- Cylinder-head gaskets
- Rocker-cover gaskets
- Intake-manifold gaskets
- Exhaust-manifold gaskets
- Turbocharger gaskets
- Oil-pan gaskets
- Water-pump gaskets
- Crankshaft seals
- Oil seals
- Liner seals
- O-rings
Complete gasket and sealing requirements can also be supplied as part of an applicable engine overhaul requirement.
Caterpillar 3408B Overhaul Parts
For a complete Caterpillar 3408B engine overhaul, Alfa Marine Spare Parts can assist with applicable:
- Cylinder liners
- Pistons
- Piston rings
- Piston pins
- Cylinder heads
- Intake valves
- Exhaust valves
- Connecting rods
- Main bearings
- Connecting-rod bearings
- Thrust bearings
- Crankshaft parts
- Camshaft parts
- Fuel-system parts
- Turbocharger parts
- Cooling-system parts
- Oil pumps
- Oil cooler parts
- Gaskets
- O-rings
- Seals
For major overhaul requirements, send the complete engine identification together with the required parts list.
Caterpillar 3408B Top-End Overhaul Parts
Top-end overhaul requirements can include:
- Cylinder heads
- Intake valves
- Exhaust valves
- Valve guides
- Valve seats
- Valve springs
- Rocker parts
- Fuel injectors
- Injector seals
- Cylinder-head gaskets
- O-rings
- Seals
The final overhaul scope should be determined according to engine condition and inspection results.
Caterpillar 3408B Reman Parts
Applicable Caterpillar Reman parts may be available for selected 3408B requirements.
Depending on the individual engine and part number, Reman options can apply to selected:
- Turbochargers
- Fuel-system parts
- Starters
- Alternators
- Major engine components
Availability and compatibility should always be confirmed against:
3408B + Engine Serial Number + Arrangement Number + Existing Part Number
Caterpillar 3408B Marine Applications
Applicable Caterpillar 3408B engines have been used across heavy-duty marine and power applications.
These can include:
- Commercial vessels
- Fishing vessels
- Workboats
- Tugboats
- Utility vessels
- Marine propulsion
- Auxiliary engines
- Marine generator applications
Individual installations can differ according to power rating, duty cycle, cooling arrangement and vessel configuration.
Caterpillar 3408B vs 3408
The Caterpillar 3408B belongs to the same wider V8 engine platform as the Caterpillar 3408.
Both are members of the 3400 Series, but they represent different engine generations.
Differences can affect:
- Fuel-system parts
- Turbochargers
- Cylinder parts
- Cooling-system parts
- Pumps
- Electrical parts
- Internal-engine parts
For the original platform, visit our Caterpillar 3408 Marine Engine Parts page.
Caterpillar 3408B vs 3408C
The Caterpillar 3408B and 3408C are different generations within the same V8 engine platform.
Although they share the wider 3408 architecture, parts should not automatically be considered interchangeable.
Always verify:
- Complete engine model
- Engine serial number
- Arrangement number
- Existing part number
before ordering.
Caterpillar 3408B vs 3406
The Caterpillar 3408B and 3406 belong to the wider Caterpillar 3400 Series but use different cylinder configurations.
Caterpillar 3408B — V8
Caterpillar 3406 — inline 6
For six-cylinder requirements, visit our Caterpillar 3406 Marine Engine Parts page.
Caterpillar 3408B vs 3412
The Caterpillar 3408B and 3412 are both members of the wider 3400 family but use different V-engine configurations.
Caterpillar 3408B — V8
Caterpillar 3412 — V12
For twelve-cylinder requirements, visit our Caterpillar 3412 Marine Engine Parts page.
Caterpillar 3408B Within the 3400 Series
The Caterpillar 3408B belongs to the wider Caterpillar 3400 engine family.
EngineConfigurationCaterpillar 3406Inline 6Caterpillar 3406BInline 6Caterpillar 3406CInline 6Caterpillar 3408V8Caterpillar 3408BV8Caterpillar 3408CV8Caterpillar 3412V12Caterpillar 3412CV12Caterpillar 3412EV12
For information about the complete platform, visit our Caterpillar 3400 Series Marine Engine Parts page.
Caterpillar 3408B Parts Identification
Correct parts identification is important because individual Caterpillar 3408B engines can differ by serial-number range, arrangement and application.
When requesting parts, provide:
Engine model: Caterpillar 3408B
Engine serial number:
Serial-number prefix:
Arrangement number:
Existing part number:
Part description:
Quantity:
For turbochargers, pumps, starters, alternators and externally mounted parts, clear photographs of the existing component can also help.
The preferred identification sequence is:
Caterpillar 3408B + Engine Serial Number + Arrangement Number + Existing Part NumberWhy Source Caterpillar 3408B Parts From Alfa Marine Spare Parts?
Alfa Marine Spare Parts supports shipowners, ship managers, shipyards, marine engineers, repair companies, purchasing departments and engine rebuilders with Caterpillar 3408B parts and spares.
Depending on availability, we can assist with:
- Scheduled maintenance parts
- Fuel-system parts
- Cylinder parts
- Internal-engine parts
- Turbocharger parts
- Aftercooler parts
- Cooling-system parts
- Sea water pumps
- Lubrication-system parts
- Electrical parts
- Top-end overhaul parts
- Complete overhaul requirements
- Genuine parts
- OEM parts
- Replacement parts
- Applicable Reman parts
For the complete engine family, visit our Caterpillar 3400 Series Marine Engine Parts page.
For the wider V8 platform, visit our Caterpillar 3408 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 3408B a V8 Engine?
Yes. The Caterpillar 3408B uses an eight-cylinder V configuration.
Is the Caterpillar 3408B Part of the 3400 Series?
Yes. The 3408B belongs to the wider Caterpillar 3400 Series.
Visit our Caterpillar 3400 Series Marine Engine Parts page for the complete family.
What Is the Caterpillar 3408B Displacement?
The Caterpillar 3408B belongs to the approximately 18-litre displacement class of the 3408 platform.
Are Caterpillar 3408 and 3408B Parts the Same?
Not necessarily.
Parts should be verified using the exact engine model, serial number, arrangement number and existing part number.
Are Caterpillar 3408B and 3408C Parts Interchangeable?
Not automatically.
Although both belong to the wider 3408 platform, individual components can differ between generations and arrangements.
Can You Supply Caterpillar 3408B Fuel Injectors?
Yes. We can assist with applicable injectors, nozzles and other fuel-system parts, subject to correct identification and availability.
Can You Supply Caterpillar 3408B Turbochargers?
Yes. We can assist with applicable genuine, OEM, replacement and Reman turbocharger requirements, subject to availability.
Provide the engine serial number and existing turbocharger number.
Can You Supply Caterpillar 3408B Sea Water Pumps?
Yes. We can assist with applicable sea water pumps and repair parts.
Provide the engine serial number and existing pump number because marine cooling arrangements can differ.
Can You Supply Caterpillar 3408B Overhaul Parts?
Yes. Depending on availability, we can assist with pistons, liners, rings, bearings, cylinder-head parts, fuel-system parts, turbocharger parts, pumps, gaskets, seals and other overhaul requirements.
Related Caterpillar Engine Pages
Caterpillar 3400 Series Marine Engine Parts
Caterpillar 3408 Marine Engine Parts
Caterpillar 3406 Marine Engine Parts
Caterpillar 3412 Marine Engine Parts
Caterpillar 3512 Marine Engine Parts
Caterpillar 3516 Marine Engine Parts
Caterpillar C18 Marine Engine Parts
Caterpillar C32 Marine Engine Parts
Caterpillar Marine Engine Parts & Rebuild Kits
Caterpillar Engine Parts Catalogue
Request Caterpillar 3408B Marine Engine Parts
Looking for Caterpillar 3408B marine engine parts, maintenance spares or overhaul parts?
Send us:
Engine model: Caterpillar 3408B
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 part.
Email: request@alfamarinespareparts.com
For the complete family, visit our Caterpillar 3400 Series Marine Engine Parts page.
For the wider V8 platform, visit our Caterpillar 3408 Marine Engine Parts page.
You can also browse our Caterpillar Marine Engine Parts & Rebuild Kits.
Worldwide supply of Caterpillar 3408B parts for commercial vessels, workboats, fishing vessels, shipyards, marine repair companies and engine rebuilders.