Caterpillar 3116 Marine Engine Parts & Spares
Alfa Marine Spare Parts supplies Caterpillar 3116 marine engine parts and spares for commercial vessels, workboats, fishing vessels, yachts, propulsion systems, auxiliary installations and marine power applications.
We source genuine, OEM, replacement and applicable Reman Caterpillar 3116 parts, subject to availability, for scheduled maintenance, engine repair, top-end overhaul and complete engine rebuild requirements.
Our sourcing capabilities cover fuel-system components, injectors, cylinder heads, pistons, piston rings, cylinder liners and cylinder components, connecting rods, bearings, turbochargers, aftercooler components, sea water pumps, jacket-water pumps, heat exchangers, oil pumps, oil coolers, starters, alternators, gaskets, seals and overhaul components.
Caterpillar continues to maintain a dedicated parts catalogue for the 3116 Marine Engine, with serial-number-based parts identification.
For other Caterpillar engines, visit our Caterpillar Marine Engine Parts & Rebuild Kits 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 3116 component? Request a Quote or email request@alfamarinespareparts.com.
Caterpillar 3116 Marine Engine Overview
The Caterpillar 3116 is a six-cylinder inline four-stroke diesel engine that was produced in marine as well as industrial and equipment configurations.
Marine versions were used in propulsion and other vessel applications and remain in service in many older boats and commercial vessels.
Caterpillar's current Parts Store continues to identify the 3116 Marine Engine as a distinct equipment application, making the complete engine serial number particularly important when identifying replacement parts.
The 3116 was produced in multiple configurations and ratings.
Individual engines can therefore differ according to:
- Engine serial number
- Serial-number prefix
- Arrangement number
- Marine rating
- Rated engine speed
- Turbocharger configuration
- Aftercooler configuration
- Fuel-system arrangement
- Cooling-system arrangement
- Vessel installation
- Production revision
For this reason, replacement components should not be selected solely from the 3116 model designation.
Caterpillar 3116 Technical OverviewSpecificationCaterpillar 3116 MarineManufacturerCaterpillarEngine model3116Engine type4-stroke dieselCylinder configurationInline 6Number of cylinders6Displacement classApprox. 6.6 LAspirationTurbocharged / aftercooled on applicable marine configurationsFuel systemMechanical, configuration dependentCooling systemMarine configuration dependentApplicationsMarine propulsion and other marine applicationsParts identificationSerial number and arrangement dependent
Exact horsepower, rated speed, turbocharger configuration and installed components vary according to the individual engine arrangement.
Caterpillar documentation includes a 3116 marine high-performance Reman configuration rated at 350 hp at 2800 rpm, demonstrating one of the marine configurations produced for this engine. This rating should not be treated as the specification for every 3116 marine engine.
Caterpillar 3116 Marine Engine Parts
Alfa Marine Spare Parts can assist with a broad selection of Caterpillar 3116 engine parts for routine service, corrective maintenance and complete engine overhaul requirements.
Parts requirements can include:
- Internal-engine components
- Cylinder components
- Fuel-system parts
- Turbocharger components
- Cooling-system parts
- Lubrication-system parts
- Electrical components
- Gaskets and seals
- Maintenance parts
- Overhaul components
You can also browse our Marine Spare Parts Catalogue.
Caterpillar 3116 Cylinder Head Parts
Cylinder-head requirements can include:
- Complete cylinder heads
- Intake valves
- Exhaust valves
- Valve guides
- Valve seats
- Valve springs
- Rocker components
- Injector-related components
- Cylinder-head sealing components
- O-rings
- Seals
- Fasteners
For cylinder-head repairs or top-end overhaul requirements, provide the engine serial number and existing part numbers whenever available.
Caterpillar 3116 Pistons & Internal Engine Parts
For Caterpillar 3116 engine repairs and overhaul requirements, we can assist with applicable:
- Pistons
- Piston rings
- Piston pins
- Connecting rods
- Connecting-rod bushings
- Main bearings
- Connecting-rod bearings
- Thrust components
- Crankshaft components
- Camshaft components
- Gaskets
- O-rings
- Seals
Internal-engine components should always be checked against the individual engine serial number and arrangement.
Caterpillar 3116 Fuel System Parts
Fuel-system components are an important maintenance area on legacy Caterpillar 3116 engines.
Requirements can include:
- Fuel injectors
- Injector components
- Fuel transfer pumps
- Fuel priming components
- Fuel filters
- Fuel-water separator components
- Fuel lines
- Fuel fittings
- Fuel-pressure components
- Governor-related components
- Injector seals
- Fuel-system gaskets
Fuel-system specifications can differ between individual 3116 engine arrangements.
Always provide the existing part number whenever available.
Caterpillar 3116 Fuel Injectors
For Caterpillar 3116 injector requirements, provide:
Engine model: Caterpillar 3116
Engine serial number:
Serial-number prefix:
Arrangement number:
Existing injector number:
Quantity:
The engine serial number is particularly important because the 3116 was produced across multiple applications and configurations.
Caterpillar 3116 Turbocharger Parts
Applicable Caterpillar 3116 marine configurations use turbocharging, with aftercooling on applicable versions.
Turbocharger requirements can include:
- Complete turbochargers
- Applicable Reman turbochargers
- Turbocharger cartridges
- Compressor components
- Turbine components
- Bearings
- Seals
- Oil-feed components
- Oil-return components
- Intake connections
- Exhaust connections
- Mounting gaskets
Turbocharger selection depends on the engine rating and arrangement.
For accurate identification, provide:
Engine Serial Number + Existing Turbocharger Number
Do not order a 3116 turbocharger based only on the engine model.
Caterpillar 3116 Aftercooler Parts
Applicable aftercooled 3116 marine configurations can require:
- Aftercooler assemblies
- Aftercooler cores
- Housings
- End covers
- Gaskets
- O-rings
- Seals
- Air connections
- Cooling connections
- Mounting components
The aftercooler arrangement should be verified against the individual engine and vessel installation.
Caterpillar 3116 Cooling System Parts
Marine cooling-system requirements can include:
- Sea water pumps
- Raw-water pumps
- Jacket-water pumps
- Heat exchangers
- Aftercooler components
- Oil coolers
- Thermostats
- Expansion-tank components
- Cooling pipes
- Hoses
- Pump shafts
- Mechanical seals
- Bearings
- Gaskets
- O-rings
Marine cooling arrangements can differ considerably from industrial or equipment versions of the 3116.
For this reason, always identify cooling components against the 3116 Marine Engine serial number and existing component number.
Caterpillar 3116 Sea Water Pump Parts
For applicable 3116 marine installations, we can assist with:
- Complete sea water pumps
- Raw-water pumps
- Pump shafts
- Pump seals
- Mechanical seals
- Bearings
- Pump covers
- Pump housings
- Gaskets
- O-rings
- Repair components
Correct sea water pump identification can depend on:
- Engine serial number
- Arrangement number
- Cooling configuration
- Existing pump number
- Connection arrangement
- Vessel installation
Do not assume every Caterpillar 3116 marine engine uses the same sea water pump.
Caterpillar 3116 Heat Exchanger Parts
Applicable heat-exchanger-cooled 3116 marine installations can require:
- Heat exchanger assemblies
- Heat exchanger cores
- End covers
- Gaskets
- O-rings
- Seals
- Cooling connections
- Mounting components
The correct heat exchanger should be identified against the individual engine and cooling-system arrangement.
Caterpillar 3116 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 operation is essential for protecting the crankshaft, bearings, pistons, camshaft and turbocharger.
Caterpillar 3116 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 3116 Camshaft & Timing Parts
Timing-system requirements can include:
- Camshafts
- Camshaft bearings
- Camshaft gears
- Timing gears
- Gear-train components
- Covers
- Bushings
- Fasteners
- Gaskets
- Seals
Correct components should be identified using the complete engine arrangement.
Caterpillar 3116 Air Intake & Exhaust Parts
Air-intake and exhaust requirements can include:
- Intake manifolds
- Exhaust manifolds
- Turbocharger connections
- Aftercooler components
- Air-intake pipes
- Exhaust connections
- Exhaust elbows
- Gaskets
- Seals
- Clamps
- Mounting hardware
The exact arrangement can differ according to marine rating and vessel installation.
Caterpillar 3116 Starter & Alternator Parts
Electrical requirements can include:
- Starter motors
- Starter solenoids
- Alternators
- Charging-system components
- Temperature switches
- Pressure switches
- Senders
- Gauges
- Wiring
- Connectors
Before ordering electrical components, verify:
- Engine serial number
- Existing part number
- System voltage
- Mounting arrangement
- Electrical connections
Caterpillar 3116 Gaskets & Seals
Gasket and sealing requirements can include:
- Cylinder-head sealing components
- Rocker-cover gaskets
- Intake-manifold gaskets
- Exhaust-manifold gaskets
- Turbocharger gaskets
- Oil-pan gaskets
- Water-pump gaskets
- Crankshaft seals
- Oil seals
- Injector seals
- O-rings
Complete gasket and sealing requirements can also be prepared together with associated overhaul components.
Caterpillar 3116 Overhaul Parts
For a Caterpillar 3116 engine overhaul, Alfa Marine Spare Parts can assist with applicable:
- Pistons
- Piston rings
- Piston pins
- Cylinder components
- Cylinder-head components
- Intake valves
- Exhaust valves
- Connecting rods
- Main bearings
- Connecting-rod bearings
- Thrust components
- Crankshaft parts
- Camshaft parts
- Fuel-system components
- Turbocharger parts
- Cooling-system components
- Oil pumps
- Oil cooler components
- Gaskets
- O-rings
- Seals
For major overhaul requirements, send the complete engine identification together with the required parts list.
Caterpillar 3116 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 seals
- Head sealing components
- O-rings
- Seals
The final overhaul scope should be based on engine condition, operating history and inspection results.
Caterpillar 3116 Reman Parts
Caterpillar continues to document Reman components for the 3116 platform.
Depending on the specific engine and part number, applicable Reman requirements can include:
- Complete Reman engines
- Short blocks
- Basic engine configurations
- Turbochargers
- Fuel-system components
- Starters
- Alternators
- Other major components
One current Caterpillar record identifies 20R-7565 as a 3116 Reman engine specifically configured as a turbo-aftercooled marine high-performance engine rated at 350 hp at 2800 rpm.
This does not mean 20R-7565 fits every 3116 marine installation.
Compatibility should always be verified using:
3116 + Engine Serial Number + Arrangement Number + Existing Part NumberCaterpillar 3116 Marine Applications
The Caterpillar 3116 has documented marine-engine applications.
Depending on configuration, the engine has been used in applications such as:
- Marine propulsion
- Commercial vessels
- Workboats
- Fishing vessels
- Recreational boats
- Yachts
- Auxiliary applications
- Other vessel installations
Because the 3116 was also produced for non-marine applications, specifying 3116 Marine Engine when requesting parts helps prevent incorrect component selection.
Caterpillar 3116 vs 3126
The Caterpillar 3116 and 3126 are related six-cylinder engine platforms, but they should be treated as separate engine models for parts identification.
Differences can affect:
- Fuel-system components
- Injectors
- Turbochargers
- Cooling-system parts
- Internal-engine components
- Electrical parts
- Gaskets and seals
- Marine accessories
Do not assume a component from a Caterpillar 3126 will fit a 3116 simply because the engines are related.
Caterpillar 3116 vs 3208
The Caterpillar 3116 and 3208 are both well-known legacy Caterpillar marine engines, but they use fundamentally different engine configurations.
Caterpillar 3116 — inline six-cylinder
Caterpillar 3208 — V8
They should be treated as completely separate engine platforms when identifying replacement parts.
Caterpillar 3116 Parts Identification
Correct parts identification is especially important because Caterpillar produced the 3116 for several different applications.
When requesting parts, provide:
Engine model: Caterpillar 3116
Application: Marine
Engine serial number:
Serial-number prefix:
Arrangement number:
Existing part number:
Part description:
Quantity:
For pumps, turbochargers, starters, alternators and other externally mounted components, clear photographs can also help with identification.
The preferred identification sequence is:
Caterpillar 3116 Marine + Engine Serial Number + Arrangement Number + Existing Part NumberWhy Source Caterpillar 3116 Parts From Alfa Marine Spare Parts?
Alfa Marine Spare Parts supports shipowners, yacht operators, ship managers, shipyards, marine engineers, purchasing departments, repair companies and engine rebuilders with Caterpillar 3116 marine engine parts and spares.
Depending on availability, we can assist with:
- Routine maintenance parts
- Fuel-system components
- Fuel injectors
- Cylinder components
- Internal-engine parts
- Turbocharger components
- Aftercooler parts
- Cooling-system components
- Sea 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 3116 a Marine Engine?
Yes. Caterpillar maintains a dedicated 3116 Marine Engine equipment and parts catalogue.
The 3116 was also used in non-marine applications, so the exact application and engine serial number should always be provided when ordering parts.
How Many Cylinders Does the Caterpillar 3116 Have?
The Caterpillar 3116 is an inline six-cylinder four-stroke diesel engine.
What Is the Caterpillar 3116 Displacement?
The Caterpillar 3116 belongs to approximately the 6.6-litre displacement class.
Is the Caterpillar 3116 Turbocharged?
Applicable marine configurations are turbocharged, and some versions are turbocharged and aftercooled.
The exact arrangement depends on the engine configuration.
Did Caterpillar Produce a 350 HP 3116 Marine Engine?
Yes. Caterpillar currently documents a 3116 Reman marine high-performance configuration rated at 350 hp at 2800 rpm.
This is one specific configuration and should not be interpreted as the rating of every Caterpillar 3116 marine engine.
Can You Supply Caterpillar 3116 Fuel Injectors?
Yes. We can assist with applicable injector and fuel-system requirements, subject to correct identification and availability.
Can You Supply Caterpillar 3116 Turbochargers?
Yes. We can assist with applicable genuine, OEM, replacement and Reman turbocharger requirements, subject to availability.
Provide the existing turbocharger number and engine serial number whenever possible.
Can You Supply Caterpillar 3116 Sea Water Pumps?
Yes. We can assist with applicable 3116 marine sea water pumps and related cooling-system components.
Provide the existing pump number and engine serial number for correct identification.
Can You Supply Caterpillar 3116 Overhaul Parts?
Yes. Depending on availability, we can assist with pistons, rings, bearings, cylinder-head components, fuel-system components, turbocharger parts, cooling-system parts, gaskets, seals and other overhaul requirements.
Are Caterpillar 3116 and 3126 Parts Interchangeable?
Not automatically.
The engines are related but should be treated as separate models. Verify every component against the engine serial number and existing part number.
Related Caterpillar Engine Pages
Caterpillar 3208 Marine Engine Parts
Caterpillar 3400 Series Marine Engine Parts
Caterpillar 3406 Marine Engine Parts
Caterpillar 3412 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 3116 Marine Engine Parts
Looking for Caterpillar 3116 marine engine parts, maintenance spares or overhaul components?
Send us:
Engine model: Caterpillar 3116
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 3116 parts for commercial vessels, workboats, fishing vessels, yachts, shipyards, marine repair companies and engine rebuilders.