The Caterpillar 3406B Engine is the engine that powers a generation of heavy-duty equipment and vehicles. We here at Vaz Auto Solutions offer a high-quality used 3406B Cat Engine for sale, this comes with our assurance of excellent performance and value for your equipment needs.
The Caterpillar 3406B Cat engine is a 14.6-liter, In-Line 6-cylinder diesel engine renowned for its robustness and exceptional performance. Widely used in heavy-duty trucks, construction equipment, and marine applications, this engine provides a reliable power source with impressive durability. The 3406B Cat engine typically delivers around 350 horsepower in standard tune and can reach up to 525 horsepower with the right configurations, all while running the legendary mechanical fuel injection system that pre-dates the electronic 3406E.
The Cat 3406 family went through several distinct generations during its long production history. This listing is the 3406B mechanical generation, NOT the 3406E electronic generation. Buyers researching "3406" should understand the differences:
| 3406A | 1973 to 1980 | Mechanical | First-generation 3406. In-line mechanical pump, no aftercooler |
|---|---|---|---|
| 3406B (THIS LISTING) | 1980 to 1987 | Mechanical | Updated mechanical pump, ATAAC aftercooler added, refined power ratings up to 525 hp |
| 3406C | 1988 to 1993 | Mechanical | Sleeve metering mechanical fuel system, refined emissions, transitional generation |
| 3406E | 1993 to 1998 | Electronic | First electronic 3406, HEUI fuel system, ECM-controlled, sold separately as our vaz61 listing |
| C15 | 1998 to 2003+ | Electronic | Successor to 3406E, ACERT later variants |
The 3406B and 3406E are different engines. ECM electronics, fuel system, mounting, and ancillary systems differ. If you're searching for the 3406B specifically (mechanical generation), this is the right listing. If you're searching for the 3406E (electronic generation), see our separate 3406E CAT Engine listing (vaz61).
The 3406B Cat Engine has a big reputation among industrial diesel engines because of its high performance and bullet-proof mechanical durability that is hardly matched by anything else.
The 3406B Cat engine has very wide application across vehicles and machinery. Confirm your specific application's spec list before ordering. It can fit:
Here at Vaz Auto Solutions, you will find the Used 3406B Cat Engine for Sale at competitive pricing, our goal is to make your quest for a heavy-duty diesel engine seamless. This Used 3406B Cat Engine has been put through a series of tests including oil analysis, compression testing, and condition verification.
| Item | Details |
|---|---|
| INCLUDED | Long block: cast iron block, crankshaft, pistons, connecting rods, camshaft, cylinder head, valve train, oil pan, front timing cover, gear train, mechanical fuel injection pump (typical), mechanical injectors (typical), valve covers. |
| NOT INCLUDED | Turbocharger (sold separately when condition warrants), aftercooler / ATAAC core (chassis-mounted, not engine-mounted), wiring (3406B is mechanical, minimal electrical), exhaust manifold, starter, alternator, A/C compressor, water pump (typical), accessory drive bracketry. |
| Fluids | Drained before shipping. Refill with 15W-40 CK-4 (or equivalent) heavy-duty diesel motor oil, approximately 12 gallons. |
| Core Note | No core charge. You are not required to return your old engine. |
The Cat 3406B was used in:
| Vehicle | Compatibility |
|---|---|
| Kenworth W900, K100, T800, T600 | 1980 to 1987 (Cat-equipped variants) |
| Peterbilt 359, 379, 362, 377 | 1980 to 1987 (Cat-equipped variants) |
| Freightliner FLT, FLC, Classic | 1980 to 1987 (Cat option) |
| Mack CH, RD, CL, DM | 1980 to 1987 (Cat option, Mack also offered Mack EM7 / E6 / E7 engines) |
| International 9300, 9370 | 1980 to 1987 (Cat-equipped) |
| Western Star 4900, 5900 | 1980 to 1987 (Cat-equipped) |
| Construction Equipment | Cat 988, 980, 950 wheel loaders; Cat D8, D9 dozers; Cat 14G, 16G motor graders; Cat 631, 633 scrapers; various other Cat machines |
| Industrial Generators | Cat 3406B-powered prime power and standby generators |
| Marine Vessels | 3406B marine variants powering commercial fishing, tug, workboat, and yacht applications |
| Mining Equipment | Cat haul trucks and mining equipment from the era |
Every used 3406B Cat we ship goes through this process:
Where donor mileage is verified, it is shared. Most 3406B cores have logged 700,000+ miles, which is normal for an engine designed for 1,000,000+ mile service.
| Air Intake | Turbocharged and Air-to-Air Aftercooled (ATAAC) |
|---|---|
| Bore X Stroke | 5.4 in x 6.5 in |
| Compression Ratio | 14.5:1 |
| Coolant Capacity | 10 gallons |
| Cooling System | Water-cooled |
| Engine Model | 3406B |
| Engine Type | Four-stroke, In-line 6-cylinder diesel engine |
| Oil Capacity | 12 gallons |
| Horsepower | Up to 525 hp |
| Torque | 1,350 to 1,750 lb-ft |
| Displacement | 14.6 liters |
| Rpm Range | 1,600 to 2,100 RPM |
| Dimensions | 117.28 in L x 39.22 in W x 58.04 in H |
| Fuel System | Mechanical fuel injection (PRE-electronic) |
| Production Era | 1980 to 1987 |
| Compatibility | 1984 Caterpillar 3406B Engine and cross-fit applications |
| Price | $12,000.00 |
Got a used 3406B Cat Engine from Vaz Auto Solutions for our Freightliner. The engine arrived on time and in good condition. It installed without any problems and has been running smoothly. Great performance for a used engine. Highly recommend.
Purchased a used 3406B Cat Engine for our John Deere tractor from Vaz Auto Solutions. Fast delivery and the engine works perfectly. Provides strong power for our farm tasks. Great quality and service.
Every used 3406B Cat engine sold by Vaz Auto Solutions is covered by a 15 day replacement warranty from the date of delivery.
To file a claim, contact us within 15 days of delivery at (240) 301-0095 or support@vazautosolutions.com.
