Rebuilding Tips on the ISX - Engine Builder Magazine

Rebuilding Tips on the ISX

Each newer version of the Cummins ISX 15 engine gets more fuel-efficient as the technology keeps advancing. Cummins has stated that the newest ISX 15 delivers more horsepower than older ISX engine models, ranging from 400-600 hp with 2050 lb.-ft. of peak torque. So what do diesel engine builders need to remember when working on the ISX?

cummins ISX 15[1]Each newer version of the Cummins ISX 15 engine gets more fuel-efficient as the technology keeps advancing. Cummins has stated that the newest ISX 15 can deliver up to 2 percent better fuel economy than previously reported. The newest Cummins ISX 15 operational efficiency actually delivers more horsepower than in older ISX engine models.

The ratings on the ISX 15 range from 400-600 hp (298-447 kW) with 2050 lb.-ft. of peak torque. The SmartTorque system Cummins developed adds roughly 200 lb.-ft. of extra torque to the top two gears of the engine.

So what do diesel engine builders need to remember when working on the ISX?

1. Pay special attention to the spring-loaded cam gear.

2. You’ll need to use a special tool for the front and back seals.  Special puller tools to pull off the crankshaft are available from several different tool suppliers.

3. Back off the spring-loaded tension before unloading it.

4. Totally non-interchangeable between ISX and QSX. Use all specified parts.

5. Pay attention to differences between ISX engine blocks. Some have EGRs and others do not. You can use both types of engine blocks if need be; just realize that the water fittings need to be fitted with frost plugs.

6. Everything on ISX and QSX is heavy-duty including heavy-duty cams.

7. Make sure to set the idle gear properly. ISX has floating gears as they are on a floating hub. The gears float because of the required backlash. There also must be torque between all of the gears and the timing must be set properly between the gears.  In a running engine the gears must be unloaded. Only the Detroit 60 Series has similar floating gears.

8. Pay special attention to the dual overhead cams: one is for the valves and injectors and the other is for the Jake Brakes.

9. Overall, strictly follow the service manual. Stick to OEM specifications and tolerances as this engine is a very precise piece of equipment and allows little room for error.

From the staff at Capital Reman Exchange  http://capitalremanexchange.com/

You May Also Like

Properties of Pistons

Pistons are perhaps one of the more sophisticated chunks of metal in the picture. Here’s what you should know.

Most of us are familiar with the Enzo Ferrari quote, “What’s behind you doesn’t matter.” We can all agree the man responsible for these iconic words knew a thing or two about racing. His quote speaks to many of us, on many levels, and it’s the reason we’re driven to always do things better.

A New Take on the Rotary Engine

What if we could design a new rotary engine that addresses certain limitations without violating the laws of physics? This is what LiquidPiston has been working at for over a decade.

Perfecting Ring Seal Soup

Using modern honing machines, surface finishes, crosshatch angles, ring materials, and coatings all combine to create a more efficient engine.

Connecting Rod Stress

Connecting rods are subject to constant stress through extreme tensile and compressive loads, each one tied to a different aspect of operation.

Balancing, A State of Equilibrium

The balance of a rotating assembly is critical in every aspect and for every engine.

Other Posts

Somethin to Prove – Triple-Turbo 5.9L Super Stock Cummins Engine

At just 16 years old, Jayden Litman wants to be one of the best sled pullers out there! Not only that, she has goals to be the youngest female competitor in the Super Stock diesel class. To make it all happen, Jayden drives a truck named Somethin to Prove, which houses a triple-turbo 5.9L Cummins

Triple-Turbo 5.9L Super Stock Cummins Engine

Jayden Litman is a 16 year old out to prove she has what it takes to compete with the men of the Super Stock pulling class. Helping her beat the boys is a truck named Somethin to Prove and a triple-turbo 5.9L billet Cummins engine built by Scheid Diesel.

Super Stock Cummins engine
It’s the Diesel Revolution

Each year, for the past six years now, I’ve covered more diesel content than the year before, and for good reason.

Turbocharged 5.9L Cummins Engine

At Back Bay Diesel Performance, repair and performance work are taken very seriously. Those capabilities are often showcased through custom shop builds, like shop owner Adam Nichols’ own turbocharged 5.9L Cummins engine for his personal drag truck. Check it out!