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Caterpillar 3406B Engine Parts Catalog

Aftermarket Parts for Caterpillar 3406B Engines

The Caterpillar 3406B is one of CAT’s most proven and rebuildable diesel engines. Built for power and longevity, the 3406B is widely used in marine propulsion, power generators, oilfield equipment, and construction machinery. It remains a top choice for operators and fleet managers looking for reliable, mechanical diesel performance.

At Diesel Pro Power, we supply a complete range of aftermarket Caterpillar 3406B parts, each designed to meet or exceed OEM specifications. All parts are backed by expert support and shipped globally within 24 hours.


Engine Overhaul Kit for Caterpillar 3406B Engines

  • Complete kits for in-frame or out-of-frame rebuilds

  • Includes pistons, rings, liners, wrist pins, rod/main bearings, and full gasket set

  • Available in standard and oversize specifications


Gauges for Caterpillar 3406B Engines

  • Oil pressure, coolant temperature, tachometer, voltage, and boost gauges

  • Marine-grade analog and digital styles

  • Matched senders and wiring options available


Engine Water Pump for Caterpillar 3406B Engines

  • Replacement coolant circulation pumps

  • Cast iron housing and impeller

  • Includes gasket and mounting hardware


Marine Water Pump for Caterpillar 3406B Engines

  • Raw water pumps for heat exchanger systems

  • Bronze impellers and stainless shafts

  • Fully assembled or available as rebuild kits


Cylinder Head for Caterpillar 3406B Engines

  • Aftermarket head assemblies with valves, guides, springs, and seats

  • Precision-machined surfaces for optimal sealing

  • Ready to install with no core required


Fuel Components for Caterpillar 3406B Engines

  • Mechanical fuel pumps and priming assemblies

  • Fuel shutoff solenoids, banjo fittings, and fuel lines

  • Matched to original 3406B delivery specs


Injectors for Caterpillar 3406B Engines

  • Precision-calibrated unit injectors

  • Includes seals, clamps, return lines, and O-rings

  • Compatible with standard and marine-rated injection profiles


Turbo for Caterpillar 3406B Engines

  • Direct replacement turbos in standard or high-output configurations

  • Includes gaskets, oil lines, studs, and flanges

  • Built to handle high exhaust temps and boost pressures


Intercooler / Aftercooler for Caterpillar 3406B Engines

  • Charge air coolers for marine and industrial setups

  • Improves air density and turbocharger efficiency

  • Includes gasket kits and installation hardware


Oil System Components for Caterpillar 3406B Engines

  • Gear-driven oil pumps

  • Oil coolers, filter bases, pans, and dipsticks

  • Pressure regulators and spin-on conversion kits


Crankshaft for Caterpillar 3406B Engines

  • Remanufactured and balanced crankshafts

  • Standard and undersize journals

  • Includes thrust bearings, keys, and oil seals


Camshaft for Caterpillar 3406B Engines

  • OEM-profile camshafts

  • Includes followers, thrust plates, cam bushings, and gears

  • Supports original timing and injector actuation


Engine Piston Kit for Caterpillar 3406B Engines

  • Pistons with rings, wrist pins, and retainers

  • Available for all 3406B bore and compression configurations

  • Coated and uncoated pistons available


Connecting Rod for Caterpillar 3406B Engines

  • Forged rods with bushings pre-installed

  • Balanced to match factory crank and piston setup

  • Sold individually or in matched sets


Exhaust for Caterpillar 3406B Engines

  • Wet and dry exhaust manifolds

  • Elbows, mufflers, flanges, and turbo outlet pipes

  • Marine-grade gaskets and clamps included


Gasket Kits for Caterpillar 3406B Engines

  • Full upper and lower gasket kits

  • Head gasket, valve cover, exhaust/intake, oil pan, crankshaft seals

  • High-temp materials and marine-safe options available


Sensor & Switch for Caterpillar 3406B Engines

  • Oil pressure switches, water temperature sensors, ignition switches

  • Shutdown solenoids and marine-safe electrical components

  • Designed for engine protection and alarm systems


Starter & Alternator for Caterpillar 3406B Engines

  • 12V and 24V starters for all mounting styles

  • High-output alternators with internal or external regulation

  • Includes solenoids, brackets, pulleys, and harnesses


Fuel Filter for Caterpillar 3406B Engines

  • Primary and secondary fuel filters

  • Fuel/water separators with spin-on elements

  • Filter heads and mounting kits available


Oil Filter for Caterpillar 3406B Engines

  • Spin-on oil filters and conversion adapters

  • Extended service life media for marine or genset use

  • Compatible with CAT filter heads


33C Marine Cable (3/16") for Caterpillar 3406B Engines

  • Flexible marine control cables for throttle and shift

  • Stainless core, UV-protected outer jacket

  • Available in custom lengths


43C Marine Cable (1/4") for Caterpillar 3406B Engines

  • Heavy-duty marine cables for clutch or throttle actuation

  • High-load rating with low-friction core

  • Ideal for commercial marine use


Industrial Cable for Caterpillar 3406B Engines

  • Push-pull cables for throttle, PTO, and governor setups

  • Multiple connection styles and cable lengths


Paint & Sealant for Caterpillar 3406B Engines

  • High-temperature Caterpillar yellow paint

  • Thread sealant, gasket adhesives, anti-seize

  • Suitable for marine and industrial environments


Twin Disc for Caterpillar 3406B Engines

  • Twin Disc marine transmission parts

  • Couplings, damper plates, and PTO adapters

  • Built for CAT 3406B-to-transmission integration


Why Choose Diesel Pro Power?

  • 40,000+ customers served worldwide

  • All parts are aftermarket, engineered to OEM specs

  • 24-hour global shipping

  • Expert technical support and hassle-free ordering

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