Look at your rocker cover: you’ll probably find your Cummins ISB engine serial number. You might also find it on the side of the gear housing. If you have a Cummins ISM engine, the serial number is on the rocker housing on the fuel pump side.
Continue reading Cummins Diesel Engine Serial NumbersCategory: Cummins Diesel Engine Parts & Components
Diesel Cylinder Head and Engine Rebuild Kit Bundle Sale
Highway and Heavy Parts is excited to introduce our new diesel engine parts bundle sales promotion. It includes diesel cylinder heads and diesel engine add-ons for all major heavy-duty truck and equipment manufacturers. If you need a cylinder head for your Cummins, Caterpillar, Detroit Diesel, or other heavy-duty diesel engine, you can get everything you need to do the job right and save some money.
Continue reading Diesel Cylinder Head and Engine Rebuild Kit Bundle SaleAbout Diesel Injector Trim Codes
Your fuel injectors are what keep your diesel engine running at its best. If you want solid diesel engine performance, then you need to use your injectors effectively. There’s a specific system your injector uses to improve engine performance: trim codes.
Continue reading About Diesel Injector Trim CodesDinex NOx Sensors: Smarter, Faster, Stronger!!
When it comes to maintaining the health and efficiency of your diesel engine’s aftertreatment system, having a reliable NOx sensor is essential. Dinex, a trusted name in the industry, offers a range of NOx sensors designed to keep your engine running smoothly and within emission standards. Whether you’re working with Cummins, Detroit Diesel, Freightliner, International/Navistar, Kenworth, Paccar, Peterbilt, or Volvo engines, Dinex has you covered with their second-generation NOx sensors.
Continue reading Dinex NOx Sensors: Smarter, Faster, Stronger!!VGT Turbo Problems and Symptoms: How Variable Geometry Failures Affect Boost, Heat, and Engine Performance
A Variable Geometry Turbocharger (VGT) does more than create boost.
It actively controls airflow, exhaust energy, and turbo speed across different engine conditions.
When a VGT system starts to fail, the issue is not just loss of power – it affects:
- Boost Pressure Control
- Exhaust Gas Temperature (EGT)
- Air-Fuel Ratio
- Emissions System Performance
Understanding how a VGT works – and how it fails – is key to diagnosing problems correctly.
Continue reading VGT Turbo Problems and Symptoms: How Variable Geometry Failures Affect Boost, Heat, and Engine PerformanceWhy Diesel VGT Turbo Vanes Stick (And How to Tell If It’s the Turbo or the Actuator)
Variable Geometry Turbochargers (VGTs) are designed to adjust airflow dynamically—but when they fail, one issue shows up more than any other:
Sticking vanes. If the vanes can’t move, the turbo can’t control boost properly.
And that leads to:
- Low power
- Overboost or underboost
- High exhaust temperatures
- Fault codes
The challenge is this:
Not every VGT problem is actually a bad turbo.
Continue reading Why Diesel VGT Turbo Vanes Stick (And How to Tell If It’s the Turbo or the Actuator)Cummins N14 Fuel Injectors: How They Fail, What It Affects, and When to Replace Them
On a Cummins N14, fuel injectors are one of the most critical components controlling engine performance.
They don’t just deliver fuel – they control timing, atomization, and combustion efficiency.
And when they start to fail, the issue doesn’t stay isolated to one cylinder. It begins to affect engine balance, temperature, and long-term durability.
Continue reading Cummins N14 Fuel Injectors: How They Fail, What It Affects, and When to Replace ThemKeep Your Vessel Running Strong with Marine Diesel Parts from Highway and Heavy Parts
Most people know Highway and Heavy Parts for our over-the-road diesel expertise — but what many customers don’t realize is that we also supply a full line of marine-rated diesel engine parts for commercial vessels, charter fleets, fishing boats, and recreational boats across the country.
From Caterpillar Marine to Cummins Marine, Detroit Diesel Marine, John Deere Marine, and more, we carry high-quality replacement parts engineered to survive the extreme demands of marine environments: saltwater exposure, constant load, high heat, and long duty cycles.
Whether you’re keeping a single vessel on the water or maintaining an entire fleet, Highway and Heavy Parts has the reliable components you need – backed by expert support, fast shipping, and OEM-level performance.
And below, you’ll find direct links to our most popular marine-specific parts currently available.
Continue reading Keep Your Vessel Running Strong with Marine Diesel Parts from Highway and Heavy PartsDinex Emission: The Solution to Diesel Pollution
Dinex Emission is a company that has been dedicated to helping diesel operators meet the high standards of the EPA for a very long time. Though the EPA’s goal is to reduce the emissions of dangerous gasses into the air, their restrictions can often make transporting goods, completing construction projects, and harvesting large crops more difficult. As an expert in the field of diesel emissions control, Dinex has long been the solution to this obstacle.
Continue reading Dinex Emission: The Solution to Diesel PollutionCummins ISX 870 Inframe Rebuild Problems: Why Engines Fail After a Rebuild
An inframe rebuild on a Cummins ISX 870 or ISX 871 is supposed to bring your engine back to life.
But for a lot of operators, that’s not what happens.
Instead, they run into problems almost immediately:
- Oil Consumption
- Blow-By
- Low Power
- Poor Fuel Economy
The issue usually isn’t the rebuild itself.
It’s what happens during – and right after – the rebuild.
Continue reading Cummins ISX 870 Inframe Rebuild Problems: Why Engines Fail After a RebuildCummins ISB 6.7L Fuel Injectors: What Actually Fails Inside a Common Rail Injector
Fuel injectors in a Cummins ISB 6.7L common rail system don’t just deliver fuel.
They control timing, pressure, atomization, and combustion efficiency – all within milliseconds.
When an injector begins to fail, it’s not always obvious at first.
But internally, the failure has already started.
Continue reading Cummins ISB 6.7L Fuel Injectors: What Actually Fails Inside a Common Rail InjectorCummins ISX Inframe Rebuild Kit: Liner Protrusion, Ring Seal Dynamics, and Failure Analysis
Cummins ISX engines don’t fail randomly – they fail predictably based on wear patterns, thermal load, and sealing breakdown.
An inframe rebuild restores the combustion system – but only if mechanical geometry, surface finish, and sealing dynamics are correct.
This guide breaks down the engineering-level details behind a successful Cummins ISX rebuild.
Continue reading Cummins ISX Inframe Rebuild Kit: Liner Protrusion, Ring Seal Dynamics, and Failure AnalysisYour Premier Source for Cummins Heavy-Duty Engine Parts
Highway and Heavy Parts is the premier source for high-quality heavy-duty Cummins diesel engine parts. You know the value of dependable and long-lasting parts as a fleet owner, technician, or equipment operator to maintain your Cummins engines operating at their peak efficiency.
Here you will find blogs that focus on Cummins diesel engines and the heavy-duty parts you need to keep your large truck on the road. Read about diesel engine issues, diagnostic tips, and the best engine parts for the job.
Complete Cummins Engine Coverage
Popular Cummins Engine Models
Our comprehensive inventory covers all major Cummins engine families, including ISX, ISX15, N14, ISM, ISC, M11, and X15 engines. Whether you’re maintaining legacy engines or modern powerplants, we stock the critical components needed to keep your Cummins engines performing at their best.
ISX and N14 Engine Solutions
The ISX12 and ISX15 were involved in the phase out of the N14 and M11 engines, which were unable to meet emissions standards. Because of the shift to electronic controls, the N14 has more valve train components than the ISX. We carry parts for both engine families to support your fleet’s diverse needs.
Quality Cummins Components & Services
Engine Rebuild Parts
From complete engine rebuild kits to individual components, our Cummins parts selection includes pistons, cylinder heads, fuel injectors, turbochargers, and gasket sets. Whether you’re performing routine maintenance or major rebuilds, we have the quality parts you need.
Engine Identification Support
Need help identifying your Cummins engine? For ISB engines, you’ll find the serial number on your rocker cover or on the side of the gear housing. For Cummins ISM engines, the serial number is located on the rocker housing on the fuel pump side. Our experts can help you identify the right parts for your specific engine model.
Why Choose Highway and Heavy Parts for Cummins?
Unmatched Expertise
Our diesel engine experts understand the evolution of Cummins engines and can help you navigate the differences between engine families. From the mechanical N14 to the electronic ISX series, we know what it takes to keep these engines running strong.
Quality & Reliability
Every Cummins component in our inventory meets or exceeds OEM specifications. We understand that downtime is costly, which is why we stock only the highest quality parts designed for durability and long-lasting performance.
Comprehensive Support
Whether you’re rebuilding a Cummins ISX or maintaining an N14, our team provides expert technical support and fast shipping to minimize your equipment downtime. We serve fleet owners, technicians, and equipment operators with the parts and knowledge they need.
Fast Service & Shipping
With our extensive inventory and efficient logistics, we can quickly get you the Cummins parts you need. Our commitment to fast service helps keep your heavy-duty equipment operational and productive.
Browse Our Complete Cummins Parts Catalog
Browse our complete Cummins parts catalog today and discover why Highway and Heavy Parts is the trusted choice for diesel professionals nationwide.
