Category: Blog – All HHP Blog Articles
Aftermarket vs OEM Diesel Parts: What’s the Real Difference?
When it comes to diesel engine parts, one of the most common questions is: why are OEM parts so expensive?
Many assume higher cost means higher quality – but that’s not always the case. In reality, the difference between OEM and aftermarket parts often comes down to manufacturing, distribution, and how the parts reach you.
If you’re comparing options right now, you can shop diesel engine parts to find high-quality components built for your specific engine and application.
Understanding that difference can help you make a more informed – and more cost-effective – decision when it’s time to repair your engine.
Continue reading Aftermarket vs OEM Diesel Parts: What’s the Real Difference?Caterpillar 3406E Inframe Rebuild Kit: What Actually Matters During a Rebuild
The Caterpillar 3406E is known for durability.
But like any diesel engine, it eventually needs a rebuild.
An inframe rebuild is one of the most common ways to restore performance without removing the engine from the chassis.
The success of that rebuild depends on more than just replacing parts.
It depends on how those parts work together under load.
Continue reading Caterpillar 3406E Inframe Rebuild Kit: What Actually Matters During a RebuildDiesel Engine Rocker Arms vs Pin and Roller Kits: What Actually Wears Out and Why It Matters
When diagnosing valvetrain issues in a diesel engine, rocker arms are often overlooked.
But on engines like Cummins ISX, Detroit Diesel Series 60, and Caterpillar platforms, rocker arm assemblies – and more specifically the pin and roller components – are critical wear points.
Understanding the difference between replacing a full rocker arm versus servicing pin and roller kits can prevent repeat failures and unnecessary downtime.
Continue reading Diesel Engine Rocker Arms vs Pin and Roller Kits: What Actually Wears Out and Why It MattersCaterpillar C15, 3406E Camshaft: Symptoms, Failure Causes, and Replacement Guide
If your Caterpillar C15 or 3406E isn’t running like it used to – losing power, misfiring, or making unusual noise – the problem might not be what you think.
It could be your camshaft.
And if that’s the case, waiting too long can turn a manageable repair into a full engine rebuild.
Continue reading Caterpillar C15, 3406E Camshaft: Symptoms, Failure Causes, and Replacement GuideCaterpillar 3406E Camshaft: Symptoms, Failure Causes, and Replacement Guide
If your Caterpillar 3406E is losing power, popping through the intake, or backfiring through the exhaust, the problem may not be fuel-related at all. In many cases, those symptoms point back to camshaft or valve train wear. When those components start to fail, performance can drop quickly, and if the issue is ignored, it can lead to more extensive engine damage and a much more expensive repair.
This article breaks down what the camshaft does, common signs of failure, why proper installation matters, and what to keep in mind when replacing a 3406E camshaft. If you are already looking for replacement parts, you can start by reviewing our Caterpillar 3406E Camshaft here.
Continue reading Caterpillar 3406E Camshaft: Symptoms, Failure Causes, and Replacement GuideCaterpillar C12 Camshaft Problems, Symptoms, and Replacement
If your Caterpillar C12 is losing power, running rough, or showing signs of valve train issues, the camshaft may be part of the problem. A worn camshaft can affect valve timing, engine efficiency, fuel economy, and overall performance. Left too long, what starts as a drivability issue can turn into a much larger repair.
Because the camshaft plays such a major role in how the engine breathes and performs, wear in this area should never be ignored. If you are already narrowing down the repair, our Caterpillar C12 Camshaft is a good place to start, and you can also browse more Caterpillar Engine Parts if the repair involves other related components.
Continue reading Caterpillar C12 Camshaft Problems, Symptoms, and ReplacementShould You Replace the CHRA or the Entire Turbocharger? What Diesel Owners Need to Know
When a turbocharger fails, most people ask the same question:
Should you rebuild it with a cartridge (CHRA), or replace the entire turbo?
The answer depends on what actually failed.
And getting that wrong can cost you more than the turbo itself.
Continue reading Should You Replace the CHRA or the Entire Turbocharger? What Diesel Owners Need to KnowCummins ISL G Cylinder Head Failures: Why Valve Seats Drop and How to Prevent It
The Cummins ISL G natural gas engine is built for a different type of combustion.
And that difference is exactly why the cylinder head fails the way it does.
Unlike diesel engines, ISL G failures are not typically caused by pressure.
They are caused by heat, material fatigue, and valve seat wear.
Continue reading Cummins ISL G Cylinder Head Failures: Why Valve Seats Drop and How to Prevent ItDiesel Fuel Pump Brands Explained: Bosch vs Delphi vs Denso vs Stanadyne (And More)
If you’ve ever tried to compare diesel fuel pumps, you’ve probably run into the same problem:
👉 Plenty of brand names
👉 Almost no clear explanations
If you’re in sales, diagnostics, or repairs, you’re expected to understand:
- What pump a customer needs
- What brands are reliable
- What actually matters when choosing one
This guide breaks it down in a way that actually makes sense.
Continue reading Diesel Fuel Pump Brands Explained: Bosch vs Delphi vs Denso vs Stanadyne (And More)Cummins ISX In-Frame Rebuild Failure: Why Your New Liners Aren’t Sealing (And How to Fix It)
You finished the in-frame. New liners, pistons, rings – everything looks right.
But now you’re seeing:
- Blow-By
- Oil Consumption
- Low Compression
- Or Worse… It’s Smoking Under Load
This isn’t uncommon on Cummins ISX engines – and it usually comes down to one issue:
Improper liner protrusion and ring seating during install.
If you don’t get this right, your rebuild won’t last – no matter how good your parts are.
Continue reading Cummins ISX In-Frame Rebuild Failure: Why Your New Liners Aren’t Sealing (And How to Fix It)Cummins ISX Engine Rebuild Kit: What You Need and Why It Matters
If your Cummins ISX is starting to lose power, burn oil, or show signs of internal wear, you’re not alone. These engines are built to work – but over time, even the best engines need a rebuild.
The real question is: Are you getting the right rebuild kit the first time?
Because one wrong part… one missed component… or one bad fitment can turn a rebuild into a repeat failure.
Signs Your Cummins ISX Needs a Rebuild
Before you even think about parts, you need to know if your engine is truly at that point.
Here are some of the most common warning signs:
- Excessive Oil Consumption
- Low Compression Or Hard Starts
- Blow-By Coming From The Crankcase
- Loss Of Power Under Load
- Metal In Oil Or Abnormal Engine Noise
If you’re seeing more than one of these, it’s usually not a quick fix – it’s time to start planning for a full rebuild.
What Comes in a Cummins ISX Rebuild Kit?
A complete engine rebuild kit is designed to give you everything needed to restore performance, reliability, and efficiency.
At a high level, most kits include:
- Cylinder Kits (Pistons, Rings, Liners, Pins)
- Main Engine Bearings
- Rod Bearings
- Full Gasket Set
- Seals and O-Rings
Some kits may also include upgraded or performance components depending on your application.
The key isn’t just having parts – it’s having the right parts matched correctly to your engine.
Why Fitment Matters More Than You Think
Not all ISX engines are built the same. There are differences in:
- CPL (Control Parts List)
- Engine Serial Number (ESN)
- Emissions Configurations
… which can all impact what parts actually fit your engine.
That’s why at Highway and Heavy Parts, we focus on verified fitment before anything ships.
Instead of guessing, our team checks your ESN to make sure every part in your kit is correct the first time.
The Cost of Getting It Wrong
A rebuild isn’t cheap. But doing it twice? That’s where things really get expensive.
Here’s what we see happen all the time:
- Wrong parts ordered → delays and downtime
- Incomplete kits → multiple orders and lost time
- Poor-quality components → premature failure
That’s why choosing the right supplier matters just as much as choosing the right parts.
Why Choose Highway and Heavy Parts?
When you’re rebuilding an engine, you don’t just need parts – you need confidence that the job is being done right.
At Highway and Heavy Parts, every rebuild kit is backed by:
- Verified Fitment Before Shipping
- Expert Diesel Technicians to Help Diagnose Issues
- Fast Shipping to Reduce Downtime
- 2 Year Parts and Labor Warranty
These kits are built with all-new components – no remanufactured parts, no cores required – and are manufactured to strict quality standards for long-term durability.
If you’re unsure whether your engine needs a rebuild or which kit is right, their team will help you figure it out before you buy.
Get the Right Cummins ISX Rebuild Kit the First Time
If your ISX is showing signs of wear, waiting only leads to more damage—and more expensive repairs down the road.
An inframe rebuild done at the right time restores performance, improves efficiency, and extends the life of your engine without the cost of a full replacement.
Call 844-304-7688 to speak with a diesel parts specialist
or visit highwayandheavyparts.com to find the right rebuild kit for your engine.
From diagnosis to delivery, Highway and Heavy Parts has your back.
