Have you ever thought much about your ESN or why you might need to know it? Diesel engine serial numbers are vital to ensuring you’re getting the right fit for your engine.
Continue reading Diesel Engine Serial Numbers
Have you ever thought much about your ESN or why you might need to know it? Diesel engine serial numbers are vital to ensuring you’re getting the right fit for your engine.
Continue reading Diesel Engine Serial NumbersHighway Heavy Parts is bringing you a new option when replacing Caterpillar Cylinder Heads. Now available for 3406E, C15 and C15 Acert engines is the brand new replacement cylinder head.
Continue reading Brand New Caterpillar Cylinder HeadsIf you’re running a C15 or 3406E diesel engine, you may have experienced your engine missing. So, why does that happen?
Continue reading 3406E / C15 Fuel in Coolant, Engine Miss ExplainedOEM diesel engine parts are often treated as the standard.
They come in the original manufacturer’s packaging, follow factory specifications, and move through established dealer networks.
However, when you look at the price, the real question becomes:
👉 What are you actually paying for?
Because in many cases, the cost difference between OEM and high-quality aftermarket parts is not driven by the part itself. Instead, it’s driven by everything around it.
Continue reading How to Save Up to 64% Off OEM Diesel Engine Parts (And Where Your Money Actually Goes)
Are you curious about your Caterpillar 3406E diesel engine? Well, we’re taking you through this engine in detail, so wonder no more! Read on to learn the history of the engine, as well as some common failures you might experience.
Continue reading CATERPILLAR 3406E TECHNICAL SPECIFICATIONS, SERIAL NUMBERS, & PREFIXES
At Highway and Heavy Parts, it’s our mission to take the risk out of buying diesel engine parts for our customers. So we work hard to stock parts for a large range of applications.
Continue reading What Parts We Offer; Caterpillar, Detroit Diesel and MoreAre you in the middle of an engine overhaul? Installing a new cylinder head for your C15? Have you recently blown a head gasket?
Continue reading Caterpillar C15 Acert, C15 Spacer Plate (6I4421)
When it’s time to replace a cylinder head in your C15, C15 ACERT, or 3406E, you can put another standard head in service that will work well for your truck – or, you can replace it with a high-performance cylinder head equipped with better components, built to handle the extreme conditions your engine will encounter.
Continue reading Caterpillar Stage 2 C15 Loaded Cylinder Head (1835296)

Find genuine and aftermarket Caterpillar C15 ACERT engine parts for heavy-duty trucks, construction equipment, and industrial applications at Highway and Heavy Parts. Our comprehensive inventory includes cylinder heads, turbochargers, fuel injectors, pistons, and complete engine rebuild kits designed for reliable performance in demanding conditions. Whether you need replacement parts for preventive maintenance or major engine rebuilds, we stock high-quality components that meet or exceed Caterpillar specifications.
The Caterpillar C15 ACERT engine powered Class 8 trucks, excavators, dozers, and generator sets across transportation and construction industries from 2003 to 2009. Our parts are compatible with all C15 ACERT model variations and come with manufacturer warranties for genuine parts and quality guarantees for aftermarket alternatives. Professional mechanics, fleet managers, and equipment operators trust Highway and Heavy Parts for genuine Caterpillar quality and competitively priced aftermarket solutions.
What C15 ACERT parts are available at Highway and Heavy Parts?
Our extensive C15 ACERT inventory includes cylinder heads, engine blocks, turbochargers, fuel system components, cooling system parts, and complete engine rebuild kits. We carry both genuine Caterpillar parts and certified aftermarket alternatives from trusted manufacturers. Popular items include fuel injector sleeves, cylinder head gaskets, turbocharger assemblies, oil pumps, water pumps, and camshafts specifically designed for the C15 ACERT platform.
How do I identify the correct C15 ACERT engine parts?
C15 ACERT parts are identified using Caterpillar part numbers and engine serial numbers located on the engine block. The C15 ACERT was produced from 2003–2009 with specific part variations by model year and application. Our technical team can help verify compatibility using your engine serial number, ensuring you receive the exact components needed for your specific C15 ACERT configuration.
What equipment and applications use C15 ACERT engines?
C15 ACERT engines power Peterbilt, Kenworth, Freightliner, International, and other heavy-duty truck manufacturers, as well as Caterpillar construction equipment, including 330C and 336D excavators, 966G wheel loaders, and various industrial generator sets. These engines were designed for highway trucking, construction, mining, and stationary power generation applications requiring reliable diesel performance.
The Caterpillar C15 ACERT (Advanced Combustion Emission Reduction Technology) engine featured a displacement of 15.2 liters, producing between 425 to 550 horsepower depending on application and model year. Key service intervals include oil changes every 15,000 to 25,000 miles, fuel filter replacement, and turbocharger maintenance. Common service items available in our inventory include oil filters, fuel filters, air filters, belts, hoses, and gaskets specific to C15 ACERT requirements.
Understanding proper maintenance schedules and using quality replacement parts extends C15 ACERT engine life and maintains optimal performance. Our parts inventory supports both scheduled maintenance and unexpected repairs, helping keep your C15 ACERT-powered equipment operating efficiently.
Browse our complete selection of Caterpillar C15 ACERT engine parts, or contact our technical team for specific part identification and compatibility assistance. Highway and Heavy Parts – your trusted source for heavy-duty diesel engine components.