The Smart Way to Build a 4th Gen Cummins
The Diesel Podcast
The Smart Way to Build a 4th Gen Cummins The Diesel Podcast · Jul 17, 2026
The Smart Way to Build a 4th Gen Cummins

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The Smart Way to Build a 4th Gen Cummins
power stroke
Car

power stroke

“Power Stroke” is Ford’s name for its diesel engines. It’s brought up here because the speaker has experience with Ford diesels before getting into Cummins.

Term

five-speed

“Five speed” means the car has five forward gears. It’s often used to describe a manual-style transmission and how the car drives.

Ford Mustang
Car

Ford Mustang

The Ford Mustang is a sporty car made by Ford. People often buy it for performance and style, and many parts are available to modify it. In the podcast, it’s mentioned because the speaker owned one before switching to other vehicles.

Ford Bronco
Car

Ford Bronco

The Ford Bronco is an SUV designed to handle off-road driving. Some owners lift them to make them taller and fit bigger tires. In the podcast, it’s mentioned as the vehicle the speaker moved to after selling the Mustang.

Term

lift

A “lift” means raising the truck’s suspension so it sits higher. That usually helps with off-road clearance and gives the truck a more aggressive look.

Term

gasser

“Gasser” just means a gas engine, not diesel. The speaker is saying they moved away from gas trucks and toward diesel trucks.

Term

dyno

A dyno is a machine that tests how much power a car makes. People use it to measure horsepower and torque, especially after they modify the engine.

Term

ECU

The ECU is the car’s main computer for the engine. When you “tune” it, you change how the engine runs—like how much fuel it injects—to make more power.

Term

torque

Torque is the engine’s pulling force. Higher torque usually means the vehicle can accelerate hard and tow more easily.

Concept

best of both worlds

They mean you want one vehicle that can do two things well: feel fast like a sports car, but still be useful like a truck. That’s why people build diesel trucks for both driving fun and real-world capability.

Term

small block

“Small block” is a nickname for a certain kind of V8 engine that’s popular for performance builds. People choose it because it’s common, parts are available, and it’s easy to make power.

Term

LS platform

The LS platform is a popular GM V8 engine family that a lot of people swap into other cars. It’s popular because it’s strong and there are lots of performance parts available.

Term

compounds

“Compounds” means using two turbochargers instead of one. The goal is to make boost come on better and support more power, especially at higher loads.

Term

big injectors

“Big injectors” are fuel injectors that can spray more fuel than the factory ones. More fuel (when matched with the rest of the setup) helps the engine make more power.

Term

transmission

They’re saying the transmission has to be strengthened for the extra power. If you make a lot more torque, the stock transmission may not last.

Term

quarter mile

The quarter mile is a standard drag-racing distance. People use it to talk about how fast a car runs from a stop.

Term

DPF system

A DPF is a filter that catches the smoky soot from a diesel engine. It periodically cleans itself by burning that soot off so the exhaust stays cleaner.

Term

DF system

The “DF/DEF” system is the part that uses a special fluid to clean up exhaust. It helps turn harmful exhaust gases into less harmful ones before they leave the tailpipe.

Term

EGR

EGR is a system that sends some exhaust gas back into the engine. That helps the engine make less of the harmful NOx gases.

Term

check engine lights

The check engine light is a warning that the car’s computer found a problem. On diesel trucks, it can come on when the emissions systems aren’t working right.

Concept

utmost reliability standpoint

They’re talking about how dependable the trucks are—how often they break and how well they hold up. It’s basically the “will it keep working?” point of view.

Term

DEA

“DEA” sounds like it’s referring to emissions equipment on a diesel. The point being made is that emissions parts add cost and complexity to the truck.

Term

EPA laws

EPA laws are U.S. rules that limit how much pollution vehicles can produce. The speaker is saying some trucks end up outside the U.S., so they may not have to meet the same emissions requirements.

Dodge Ram
Car

Dodge Ram

The Dodge Ram is a large pickup truck. In the podcast, it’s mentioned with diesel engine talk, meaning the conversation is about how these trucks are maintained and what owners watch for. The key point is that Ram trucks can be discussed specifically in terms of diesel engine ownership.

2020 Ram
Car

2020 Ram

They’re talking about a newer Ram truck (from 2020). The point is that newer diesel trucks can be harder to fix because they have more systems that control emissions and engine behavior.

Car

L5P

“L5P” is a specific diesel engine used in some GM trucks. The speaker is saying that newer diesel engines like this can be more complicated to fix than older ones.

Car

Detroit diesels

“Detroit diesels” is a nickname for diesel engines made by Detroit Diesel. The speaker is saying older Detroit Diesel designs were often simpler to repair than newer emissions-controlled engines.

Term

failsafe mode

Fail-safe mode is what a car does when it senses a problem—it may limit power so the engine doesn’t get damaged. People don’t like it because it usually means there’s a real issue that needs fixing.

Cummins
Car

Cummins

Cummins makes diesel engines, and they’re known for an inline-six design. Here, they’re comparing it to other diesels and talking about how engine layout can make repairs easier or harder.

Term

turbo

A turbocharger is a device that helps the engine make more power by forcing extra air in. If it’s tucked away in a hard-to-reach spot, it can make repairs take longer.

Term

plug and play add on parts

Plug-and-play parts are aftermarket upgrades that are meant to install easily, usually without cutting or rewiring. The speaker is saying his work is mostly the simpler, easier installs.

Byd Seal
Car

Byd Seal

The BYD Seal is an electric car. The podcast mentions it because the speaker had leaks and is emphasizing that maintenance matters. The main takeaway is that problems like leaks should be fixed and fluids/maintenance should be kept up with.

Term

crankcase ventilation

This is a filter that helps keep the engine’s internal “breathing” system working correctly. If it gets neglected, it can contribute to oil leaks because pressure builds up inside the engine.

Concept

maintenance

In this context, “maintenance” is the idea of staying on top of service intervals—especially filters and fluid changes—to prevent expensive component failures. The speaker emphasizes that neglected ventilation and transmission service can lead to seal and transmission problems.

Term

downpipe

A downpipe is part of the exhaust system that carries exhaust gases away from the engine/turbo area. People upgrade it to help the exhaust flow better, but it can be tight to reach on some trucks.

Term

push rod

Pushrods are parts inside the engine that help move motion from the camshaft to the valves. If they’re hard to reach, certain repairs become more work.

Dodge Power Wagon
Car

Dodge Power Wagon

The Dodge Power Wagon is a more off-road-capable version of a Ram pickup. It’s built for tougher driving than a standard truck. In the podcast, it comes up because the speaker was considering buying one but didn’t end up going that direction.

Term

heated and cooled seats

They’re talking about convenience features that warm or cool things for you, like heated seats or cooled storage. It’s mentioned as part of the “must-have” options list.

Term

leveling kit

A leveling kit is a suspension upgrade that makes the truck sit more level (usually lifting the front). It can help with tire fitment, but it may require proper alignment afterward.

Term

stock trans

“Stock trans” means the transmission is the original one that came with the truck. If it’s still stock, you’re relying on its history and condition rather than a replacement or rebuild.

SS Camaro
Car

SS Camaro

An “SS Camaro” is a higher-performance version of the Chevrolet Camaro. The host mentions it to explain how they judged a used car’s history and condition.

Term

rust belt

The “Rust Belt” is an area of the U.S. where cars often rust faster because of winter salt and moisture. That’s why buyers worry about rust when they see a car from there.

Term

EPA regulated state

An “EPA regulated state” is a place where emissions rules are enforced more strictly. That can affect diesel trucks because they may need to meet specific emissions equipment and legality requirements.

Term

dual coil setup

They’re talking about using two ignition coils instead of one. On a diesel, that can help the engine start and run better, especially when it’s cold.

Term

grid heater

A grid heater is a diesel cold-start heater that warms things up before you start the engine. It helps the engine light off more easily when it’s cold.

Term

glow plugs

Glow plugs are small heaters in a diesel engine that warm the cylinders so the engine starts easier, especially when it’s cold.

Term

blow by

Blow-by is when some of the engine’s combustion gases slip past the piston rings and get into the crankcase. More power can make that happen more, so you may need better ventilation.

Place

Brookville Indiana

Brookville, Indiana is where the host says they’ll go to get the truck dyno-tested. That’s where they’ll measure the engine’s power and torque.

Company

Wild Hoosiers

Wild Hoosiers is the name of the place the host plans to use for dyno testing. It’s where they’ll measure the truck’s power.

Term

dual fuelers

Dual fuelers means adding more than one fueling setup to get more fuel into the engine. More fuel usually means more power, but it can stress the rest of the truck.

Brand

Duramax

Duramax is GM’s diesel engine line. They’re mentioning it as one of the diesel engine brands you can buy rebuilt from the sponsor.

Term

remanufactured engines

A remanufactured engine is an older engine that gets rebuilt with new or refurbished parts. The goal is to make it work like a properly rebuilt unit, not like a random used engine.

Term

ISO 9001 2015 standards

ISO 9001 is a quality standard that companies follow to make sure their process is consistent. In this case, it’s being used to say the engine rebuilding is done with documented quality controls.

Term

industry leading warranty

A warranty is basically a guarantee that if something goes wrong within a certain time, the company will help cover the repair. They’re saying this rebuilt engine comes with strong coverage.

Term

fuel economy

Fuel economy is how efficiently an engine converts fuel into distance traveled, typically expressed as mpg or similar measures. The segment ties it to internal engine technology (pistons) aimed at reducing losses while maintaining power.

Term

DPF flush

A DPF flush is a cleaning treatment for a diesel exhaust filter. It helps remove soot so the truck can clean itself out instead of getting clogged.

Term

regen extend technology

This is a product feature meant to make the truck’s soot-cleaning cycles happen less often. The idea is to keep the exhaust filter healthier and avoid getting clogged.

Term

regeneration

Regenerations are the truck’s self-cleaning cycles for the exhaust filter. It burns off the soot so the filter can keep working.

Term

stubborn deposits

Stubborn deposits are built-up gunk inside the engine or fuel system. Cleaning them can help the truck run more smoothly and efficiently.

Term

drag race

Drag racing is when two vehicles race side-by-side in a straight line to see which accelerates faster. It’s usually about quick launches and strong power.

Term

burnouts

A burnout is when you spin the tires on purpose to make smoke and heat them up. It usually wears out tires fast and can be hard on the truck’s mechanical parts if you do it a lot.

Term

lower gear range

A lower gear range means the truck stays in lower gears longer instead of shifting up quickly. That can help the engine and transmission work more smoothly, especially when you’re working the truck hard.

Term

shift on the fly

“On the fly” shifting means changing gears while you’re already moving. Some drivers prefer controlling it themselves so the truck doesn’t shift in a way that feels harsh or stressful.

Term

tunnel cover

A tunnel cover is a cover for the back of your truck bed that helps keep stuff protected. Some are powered and roll open/closed, which can be convenient but may take up space depending on the design.

Term

hard plastic fold up

That’s a rigid bed cover made of plastic that you fold up when you need the bed. Hard covers are usually tougher and better at protecting cargo than soft ones.

Term

cargo management

Cargo management just means organizing and securing what you carry so it’s protected and easy to reach. On trucks, that often involves covers and lockable storage so tools don’t get stolen.

Term

fiberglass

Fiberglass is a strong, lightweight material made from glass fibers. It’s commonly used for rigid truck covers because it holds its shape and is tougher than soft fabric.

Term

leather snap covers

These are soft truck-bed covers that fasten with snaps and are made from leather (or something similar). The point is that they’re an older style and generally not as secure as harder covers.

Term

side bed toolboxes

Side bed toolboxes are lockable storage compartments mounted on the sides of the truck bed. They’re handy for keeping tools organized and protected, and they reduce the chance of theft.

Term

square body stuff

“Square body” is a nickname for older pickups with a boxy, angular look. The speaker is using it to talk about how older trucks had fewer convenience features than newer ones.

Term

OBS

“OBS” is a nickname people use for an older truck body style. In this conversation it’s just referring to older pickup generations compared with newer ones.

Term

tailgate

The tailgate is the back door of the truck bed that you open to load or unload things. It can also have handles or steps to help you climb in safely.

Term

adapter plate

An adapter plate is a bracket that lets you mount a different fuel filter than the one your truck came with. It’s basically what makes the new filter setup fit and work.

Term

fuel filtration systems

Fuel filtration systems are extra filters that clean the diesel before it goes into the engine. The goal is to keep dirt and junk from reaching expensive parts like the injectors.

Term

CP3

CP3 is the high-pressure fuel pump that pressurizes diesel for the injectors. If it doesn’t get steady, clean fuel, it can cause problems—especially on tuned or high-power trucks.

Term

air getting into the system

If air gets into the fuel lines, the engine can get fuel inconsistently. That can lead to rough running or damage over time, so people try to prevent it with better fuel system parts.

Term

air intake

An air intake is the part that lets air into the engine. Upgrading it can help the engine breathe better, especially when the truck is tuned.

Term

head studs

Head studs are stronger bolts that hold the engine’s cylinder head in place. When you push a diesel harder with tuning and power upgrades, studs can help keep everything sealed under higher pressure.

Term

fast fuel systems

It’s an aftermarket upgrade that helps the diesel engine get fuel more effectively. People use it when they’re planning on running a stronger tune for more power.

Term

EFI tune

An EFI tune is a software change that tells the engine computer how much fuel (and other settings) to use. It’s how people safely turn up power—usually along with hardware upgrades.

Term

diesel fuel quality

Diesel fuel quality means how good the fuel is—how clean and consistent it is. If the fuel isn’t great, a strong tune can behave worse or be harder on the engine.

Car

2008 6.7 Cummins

This is a 2008 Ram truck with a 6.7-liter Cummins diesel engine. People like it because it makes strong low-end torque and there are lots of parts and tuning options.

power wagons
Car

power wagons

The Power Wagon is a special off-road version of a Ram pickup. It’s meant to handle tough terrain, and in this chat they’re talking about the diesel engine and the extra off-road gear.

Concept

second gens and the third gens

They’re talking about older versions of the same truck model. The point is that earlier generations were less comfortable inside, while newer ones are nicer.

Concept

fifth gens

“Fifth gens” just means the fifth generation of that truck model. It’s a way to talk about different redesign eras and what changed over time.

Term

winch

A winch is like a heavy-duty cable puller. Off-road, it can help you pull the truck (or something else) out if you get stuck.

Term

sway bars

Sway bars help keep the truck from leaning too much when you turn or hit uneven ground. They help the suspension work more evenly left-to-right.

Term

disconnect

“Disconnects” here likely means parts that can temporarily disengage some drivetrain functions. The truck can run more efficiently when you’re not off-roading, but still lock back in when you need traction.

Term

4 low

“4 low” is a setting for off-roading that makes the truck crawl with more pulling power. It’s used when you’re going slowly over rough ground or when traction is poor.

Term

OEM

OEM means the company that makes the truck in the first place. The host is saying it’s cool when the truck maker listens to enthusiasts.

Term

thousand horsepower

“Thousand horsepower” means a very extreme power goal for a modified truck. It usually takes a lot of upgrades and tuning, and it can get expensive quickly.

Term

five to 600

They’re talking about aiming for a moderate power level for a modified truck. The idea is to build something fun and usable instead of going extreme.

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