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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. 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 Oil pressure, coolant temperature, tachometer, voltage, and boost gauges Marine-grade analog and digital styles Matched senders and wiring options available Cast iron housing and impeller Includes gasket and mounting hardware Raw water pumps for heat exchanger systems Bronze impellers and stainless shafts Fully assembled or available as rebuild kits Aftermarket head assemblies with valves, guides, springs, and seats Precision-machined surfaces for optimal sealing Ready to install with no core required Mechanical fuel pumps and priming assemblies Fuel shutoff solenoids, banjo fittings, and fuel lines Matched to original 3406B delivery specs Precision-calibrated unit injectors Includes seals, clamps, return lines, and O-rings Compatible with standard and marine-rated injection profiles 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 Charge air coolers for marine and industrial setups Improves air density and turbocharger efficiency Includes gasket kits and installation hardware Gear-driven oil pumps Oil coolers, filter bases, pans, and dipsticks Pressure regulators and spin-on conversion kits Remanufactured and balanced crankshafts Standard and undersize journals Includes thrust bearings, keys, and oil seals OEM-profile camshafts Includes followers, thrust plates, cam bushings, and gears Supports original timing and injector actuation Pistons with rings, wrist pins, and retainers Available for all 3406B bore and compression configurations Coated and uncoated pistons available Forged rods with bushings pre-installed Balanced to match factory crank and piston setup Sold individually or in matched sets Wet and dry exhaust manifolds Elbows, mufflers, flanges, and turbo outlet pipes Marine-grade gaskets and clamps included Full upper and lower gasket kits Head gasket, valve cover, exhaust/intake, oil pan, crankshaft seals High-temp materials and marine-safe options available Oil pressure switches, water temperature sensors, ignition switches Shutdown solenoids and marine-safe electrical components Designed for engine protection and alarm systems 12V and 24V starters for all mounting styles High-output alternators with internal or external regulation Includes solenoids, brackets, pulleys, and harnesses Primary and secondary fuel filters Fuel/water separators with spin-on elements Filter heads and mounting kits available Spin-on oil filters and conversion adapters Extended service life media for marine or genset use Compatible with CAT filter heads Flexible marine control cables for throttle and shift Stainless core, UV-protected outer jacket Available in custom lengths Heavy-duty marine cables for clutch or throttle actuation High-load rating with low-friction core Ideal for commercial marine use Push-pull cables for throttle, PTO, and governor setups Multiple connection styles and cable lengths High-temperature Caterpillar yellow paint Thread sealant, gasket adhesives, anti-seize Suitable for marine and industrial environments Twin Disc marine transmission parts Couplings, damper plates, and PTO adapters Built for CAT 3406B-to-transmission integration 40,000+ customers served worldwide All parts are aftermarket, engineered to OEM specs 24-hour global shipping Expert technical support and hassle-free ordering
Parts for Caterpillar 3406B
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Aftermarket Parts for Caterpillar 3406B Engines
Engine Overhaul Kit for Caterpillar 3406B Engines
Gauges for Caterpillar 3406B Engines
Engine Water Pump for Caterpillar 3406B Engines
Marine Water Pump for Caterpillar 3406B Engines
Cylinder Head for Caterpillar 3406B Engines
Fuel Components for Caterpillar 3406B Engines
Injectors for Caterpillar 3406B Engines
Turbo for Caterpillar 3406B Engines
Intercooler / Aftercooler for Caterpillar 3406B Engines
Oil System Components for Caterpillar 3406B Engines
Crankshaft for Caterpillar 3406B Engines
Camshaft for Caterpillar 3406B Engines
Engine Piston Kit for Caterpillar 3406B Engines
Connecting Rod for Caterpillar 3406B Engines
Exhaust for Caterpillar 3406B Engines
Gasket Kits for Caterpillar 3406B Engines
Sensor & Switch for Caterpillar 3406B Engines
Starter & Alternator for Caterpillar 3406B Engines
Fuel Filter for Caterpillar 3406B Engines
Oil Filter for Caterpillar 3406B Engines
33C Marine Cable (3/16") for Caterpillar 3406B Engines
43C Marine Cable (1/4") for Caterpillar 3406B Engines
Industrial Cable for Caterpillar 3406B Engines
Paint & Sealant for Caterpillar 3406B Engines
Twin Disc for Caterpillar 3406B Engines
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