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Caterpillar 3406E 5Ek Piston Designs

When you’re having a problem with your diesel engine, or you’re wondering which replacement parts are right for your application, we know you’re looking for the best information.

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Caterpillar 3406E Fuel Injectors (10R0959)

Is your Caterpillar 3406E overheating, running rough, or showing signs of a misfire? This can lead to an injector cup failure from compression in your fuel system, worn O-rings, and a faulty injector hold-down bolt – taking you off the road and money out of your pocket.

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Progression of Diesel Engine Pistons (One Piece to Two Piece Pistons)

Caterpillar 5EK Piston Upgrade? One Vs. Two Piece Pistons.

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The Importance of Replacing Your Injector Hold-Down Bolts

If you need to replace the fuel injectors on your CAT 3406E, C15, or C15 ACERT we know you want the highest quality and best functioning fuel injectors.

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Benefits of the Stage 2 Performance Cylinder Heads for Caterpillar C15

Have you ever thought about what a performance cylinder head could do for your diesel engine?

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Should You Buy A Rebuild Or Remanufactured Head For Your Diesel Engine?

Diesel engines, especially in heavy-duty machinery and trucks, have an extremely hard life. At one point or another, they will need major service, and the heads will have to be replaced.

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A Guide To Caterpillar ESNs – Finding Your Engine Serial Number, Formatting And Prefixes

We know that when you’re looking for parts for your Caterpillar engine, you don’t want to waste time and money on the wrong parts. That’s why it’s important to know your diesel engine’s serial number. It helps us ensure you’re getting exactly what you need the first time you order.

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Caterpillar Rebuild Kits, In-Frame & Overhaul Kits, C15,C15 Acert,3406E,

Caterpillar 3406E, C15 Engine Rebuild Kits From HHP!

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Stage 3 Performance Cylinder Head For Caterpillar Engines

Are you running a Caterpillar C15, C15 ACERT, or 3406E diesel engine? You may have taken the time to upgrade your turbocharger or install a marine cam, bigger fuel injectors, or a higher performance manifold.

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Common Diesel Turbocharger Problems

Modern diesel engines all have turbochargers. Boosting your internal combustion engine’s potential both physically and figuratively is nothing new. Diesel engines have been taking advantage of wasted exhaust gas for decades.

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How To Check For Caterpillar 3406E/C15 Fuel In Coolant

If you’re running a C15 or 3406E diesel engine, you may have experienced your engine missing. So, why does that happen?

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Highway and Heavy Parts offers a complete line of Caterpillar 3406E engine parts, from turbochargers and camshafts to complete engine rebuild kits and fuel injectors. Built for longevity and easy serviceability, the 3406E engine is a favorite among both owner-operators and fleet managers. Our parts are engineered for high performance and maximum uptime in demanding trucking and equipment applications.

The Caterpillar 3406E was produced from the mid-1990s to the early 2000s, featuring a 14.6L displacement and horsepower ranging from 375 to 550 HP. Known for its mechanical simplicity and legendary durability, it powered everything from on-highway trucks to agricultural and construction machinery.

What 3406E Parts Are Available?

Our inventory includes rebuilt cylinder heads, camshafts, valve train components, turbochargers, oil pumps, fuel injectors, cylinder head gaskets, and complete 3406E engine rebuild kits. Aftermarket options are available for budget and performance needs.

Which Trucks and Machines Use the 3406E?

This engine powered Peterbilt, Kenworth, International, and Freightliner trucks, as well as Caterpillar equipment like loaders, scrapers, and generators. It’s widely used in heavy-haul, mining, and long-haul operations.

Why Trust HHP for Your 3406E Build?

  • Quality-tested components from reliable brands
  • Fast shipping and technical support
  • Complete kits built for long-term reliability

Keep your 3406E running strong with parts designed to extend engine life and restore original power.

FAQs for the Caterpillar 3406E

  1. Is the 3406E engine still supported with new parts?
    Yes, many aftermarket suppliers—including HHP—stock new and remanufactured parts for the 3406E, including full engine rebuild kits.
  2. What makes the 3406E so reliable?
    The 3406E is praised for its mechanical fuel system, fewer electronics, and durable internal components, making it a favorite among owner-operators.
  3. What are common failure points in the 3406E?
    Over time, camshafts, turbochargers, and fuel injectors may wear out. Regular oil analysis and preventive maintenance help avoid costly failures.
  4. What is the horsepower range for the 3406E?
    Factory ratings ranged from 375 to 550 HP, but many are tuned beyond that in performance builds.
  5. Are rebuild kits available for the 3406E?
    Yes, HHP offers complete inframe and out-of-frame rebuild kits tailored to your engine’s serial number.