Caterpillar 3412 Marine Engine Spare Parts
Sourcing the correct replacement components for a Caterpillar 3412 marine engine starts with identifying the exact engine configuration, serial number and required part number.
Alfa Marine Spare Parts supplies Caterpillar 3412 marine engine spare parts for commercial vessels, workboats, fishing vessels, tugboats, offshore applications and yachts.
We can assist with individual replacement components, maintenance parts and components for major engine overhauls.
The 3412 belongs to the wider Caterpillar 3400 Series, which includes the 3406, 3408 and 3412 engine families.
For the wider Caterpillar range, visit our CAT Marine Engine Parts & Rebuild Kits page.
Need a specific 3412 component? Request a Quote.
Caterpillar 3412 Marine Engine
The Caterpillar 3412 is a heavy-duty V12 four-stroke diesel engine from the Caterpillar 3400 engine family.
Marine versions have been used for propulsion and auxiliary applications in commercial vessels, fishing vessels, workboats, tugboats, offshore vessels and yachts.
Different 3412 generations and configurations exist, so replacement components should not be selected simply because they are described as suitable for a "CAT 3412."
For more information about the different generations, read our Caterpillar 3412 Engine Types: 3412, 3412B, 3412C, 3412D & 3412E guide.
For accurate parts identification, provide:
- Engine serial number
- Arrangement number, when available
- Existing part number
- Part description
- Quantity
- Clear photographs when identification is uncertain
Caterpillar 3412 Spare Parts
Alfa Marine Spare Parts can assist with a wide range of CAT 3412 spare parts for maintenance, repair and overhaul requirements.
Common requirements include:
- Fuel injectors and fuel-system parts
- Fuel transfer pumps
- Turbochargers and turbocharger components
- Seawater and raw-water pumps
- Jacket-water pumps
- Oil pumps
- Cylinder heads
- Pistons and piston rings
- Cylinder liners
- Connecting rods
- Main and connecting-rod bearings
- Crankshaft components
- Camshaft components
- Intake and exhaust valves
- Aftercooler components
- Filters
- Gaskets, seals and O-rings
- Overhaul components
Caterpillar 3412 Fuel System Parts
Fuel-system requirements can include:
- Fuel injectors
- Fuel injection components
- Fuel transfer pumps
- Fuel filters
- Fuel lines
- Injector seals
- Fuel-system gaskets
- Associated fittings
Correct fuel-system components should be confirmed against the exact engine configuration and serial number.
When requesting an injector or another fuel-system component, send the existing Caterpillar part number whenever possible.
Caterpillar 3412 Cooling System Parts
Marine cooling-system components are particularly important when a 3412 operates continuously under load.
Common replacement requirements include:
- Seawater pumps
- Raw-water pumps
- Jacket-water pumps
- Water-pump components
- Heat exchanger components
- Aftercooler components
- Thermostats
- Cooling pipes and hoses
- Temperature sensors
- Mechanical seals
- O-rings and gaskets
For more detailed information about 3412 seawater pumps and important pump references, read our CAT 3412 Seawater Pump 6I-1898, 197-4855 & Reman Parts guide.
Caterpillar 3412 Turbocharger & Air System Parts
Depending on the engine arrangement, requirements can include:
- Turbochargers
- Turbocharger components
- Air-intake components
- Aftercooler components
- Intake manifolds
- Exhaust manifolds
- Associated gaskets and seals
A turbocharger should not be selected solely from the basic 3412 engine designation.
The engine serial number, arrangement and existing turbocharger part number should be checked before ordering.
Caterpillar 3412 Internal Engine Parts
For engine repairs and major overhaul projects, requirements can include:
- Cylinder heads
- Cylinder liners
- Pistons
- Piston rings
- Piston pins
- Connecting rods
- Main bearings
- Connecting-rod bearings
- Crankshaft components
- Camshaft components
- Intake valves
- Exhaust valves
- Valve guides
- Valve seats
- Gaskets and seals
The exact components required depend on the engine configuration and scope of repair.
Caterpillar 3412 Overhaul Parts
A Caterpillar 3412 overhaul may require components from several engine systems rather than one universal overhaul kit.
Depending on the engine and inspection results, requirements may include:
Pistons + liners + rings + bearings + cylinder-head components + gaskets + seals
Before ordering overhaul components, identify the exact engine and prepare the required parts list against the individual engine configuration.
For the wider engine family, visit our Caterpillar 3400 Series Marine Engine Parts page.
Caterpillar 3412 Pumps
Pump requirements can include:
- Seawater pumps
- Raw-water pumps
- Auxiliary water pumps
- Jacket-water pumps
- Oil pumps
- Fuel transfer pumps
- Pump repair components
Important Caterpillar 3412 seawater-pump references can include 6I-1898 / 6I1898, 197-4855 / 1974855 and 7C-3613 / 7C3613, depending on the specific application.
Do not order a pump from the engine model alone.
When requesting a pump, provide the engine serial number, arrangement number and existing pump part number whenever possible.
For troubleshooting information about reduced seawater flow, see our Caterpillar 3412 Raw Water Pump: When Seawater Flow Drops guide.
Caterpillar 3412 Gaskets & Seals
Individual sealing components and overhaul requirements can include:
- Cylinder-head gaskets
- Valve-cover gaskets
- Exhaust gaskets
- Intake gaskets
- Crankshaft seals
- Water-pump seals
- O-rings
- Complete gasket requirements
For an overhaul or larger repair, send the complete parts requirement together so the components can be checked against the engine information.
Finding the Correct Caterpillar 3412 Part Number
The safest identification sequence is:
Engine Model → Serial Number → Arrangement Number → Existing Part Number
For example:
Engine: Caterpillar 3412
Part: Seawater Pump
Part Number: XXXXXXX
Quantity: 1
Engine Serial Number: XXXXXXX
If the existing part number cannot be read, send clear photographs of the component and engine identification plate.
This is particularly important for:
- Injectors
- Pumps
- Turbochargers
- Cylinder-head components
- Internal engine parts
- Overhaul components
For additional identification advice, read our How to Order the Correct Caterpillar Marine Engine Parts guide.
Popular Caterpillar 3412 Parts
Browse our available Caterpillar 3412 parts and components below.
Use the individual product pages to check part descriptions and send an enquiry for availability.
When selecting a product, always confirm compatibility using the engine serial number, arrangement number and required Caterpillar part number.
Caterpillar 3412 Parts for Marine Applications
Caterpillar 3412 engines have been used across a wide range of marine applications, including:
- Tugboats
- Fishing vessels
- Workboats
- Offshore support vessels
- Passenger vessels
- Patrol vessels
- Yachts
- Marine generator installations
- Commercial propulsion applications
Alfa Marine Spare Parts assists vessel owners, marine engineers, ship-management companies, workshops, repair companies, engine rebuilders and shipyards with Caterpillar 3412 parts requirements.
Caterpillar 3412 Technical Guides
For engineers and vessel operators looking for additional information about the Caterpillar 3412, see our related technical guides:
- Caterpillar 3412 Engine Types: 3412, 3412B, 3412C, 3412D & 3412E — understand the different 3412 generations before identifying replacement parts.
- Caterpillar 3412 Marine Engine Losing Power Under Load — fuel, air, turbocharger and cooling-system checks when engine performance drops under load.
- CAT 3412 Seawater Pump 6I-1898, 197-4855 & Reman Parts — important seawater-pump references, applications and replacement considerations.
- Caterpillar 3412 Raw Water Pump: When Seawater Flow Drops — practical information about reduced raw-water flow and cooling-system symptoms.
Frequently Asked Questions About Caterpillar 3412 PartsWhat parts are available for a Caterpillar 3412?
Requirements can include injectors, pumps, turbochargers, cooling components, cylinder heads, pistons, liners, bearings, valves, filters, gaskets, seals and overhaul components.
Do I need the Caterpillar 3412 serial number?
The serial number is strongly recommended. Different engine arrangements and generations can use different components, so the basic 3412 model designation may not be sufficient for accurate parts identification.
Are all Caterpillar 3412 engines the same?
No. Different generations and configurations exist.
Read our Caterpillar 3412 Engine Types guide for more information about the wider 3412 family.
Can you supply Caterpillar 3412 seawater pumps?
We can assist with applicable Caterpillar 3412 seawater and raw-water pump requirements when the engine and pump references are correctly identified.
Send the engine serial number, arrangement number and existing pump number when available.
Can you identify a Caterpillar 3412 part from a photo?
Photographs can help when a part number is damaged or unreadable.
For the best identification, send clear photographs together with the engine serial number and any numbers visible on the existing component.
Can I send a complete Caterpillar 3412 spare-parts list?
Yes. Send the part numbers, descriptions and quantities together with the engine information so the complete requirement can be reviewed.
Request Caterpillar 3412 Marine Engine Parts
Looking for Caterpillar 3412 marine engine spare parts?
Send us:
Engine model + Serial number + Arrangement number + Part number + Description + Quantity
If the part number is unknown, include clear photographs of the existing component and engine identification plate.
For related engines and components, browse our Caterpillar 3400 Series Marine Engine Parts or CAT Marine Engine Parts & Rebuild Kits pages.