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CUMMINS ISX15 INFRAME ENGINE REBUILD KIT (5405986)

A loss of power, excessive oil consumption, or poor fuel economy are signs that it may be time to rebuild your Cummins ISX 15.

Minimize downtime & negative impacts on your revenue. Rebuild your engine with an inframe rebuild kit for your Cummins ISX 15, from highway & heavy parts!

We only provide new, high-quality parts in our Cummins ISX 15 inframe rebuild kits. Each part follows strict OE specifications and tolerances, they are built with hard-wearing materials for long-lasting durability. This inframe kit comes with six-cylinder liner kits, consisting of liners, anti-polish rings, liner shims, and seals. It also comes with six-piston kits including engine assembly pistons, piston pins with retaining rings, and piston ring sets. Next is a main bearing set and connecting rod bearings to keep your engine’s crankshaft moving. We have also included an oil pan gasket, an O-Ring seal, and a complete upper engine gasket kit, to properly seal up your C15.  And finally, a thermostat is the last thing included in this kit.

Engine break-in is critical. Be sure to follow the proper break-in procedure to avoid engine complications with oil consumption, fuel economy, and engine power. Also don’t forget to check out HHP’s wide selection of diesel engine parts, keeping your truck out of the service bay and on the road with Highway and Heavy Parts!

Why Cummins ISX 15 In-Frame Rebuild Kits From HHP Are The Best Choice For Your Engine Rebuild!


Backed by a 2-Year parts warranty and industry-leading service from our ASE Certified technicians.

Order now by calling 844-447-1453 or visiting us online at highwayandheavyparts.com.

From diagnosis through delivery, we’re Highway and Heavy Parts!

FAQs for the Cummins ISX15 Inframe Engine Rebuild Kit

1. What are the signs that my Cummins ISX 15 engine needs to be rebuilt?

Common signs include a loss of power, excessive oil consumption, or poor fuel economy.

2. Why should I rebuild my Cummins ISX 15 engine with an inframe engine rebuild kit?

Rebuilding your engine with an inframe rebuild kit restores performance, minimizes downtime, and prevents further engine issues.

3. What parts are included in the Cummins ISX 15 inframe engine rebuild kit?

The kit includes six-cylinder liner kits, piston kits, a main bearing set, connecting rod bearings, an oil pan gasket, an O-Ring seal, a complete upper engine gasket kit, and a thermostat.

4. Why is engine break-in important after rebuilding my Cummins ISX 15?

Proper engine break-in ensures optimal oil consumption, fuel economy, and engine power, preventing complications and extending engine life.

5. What warranty comes with the Cummins ISX 15 inframe engine rebuild kit?

The rebuild kit is backed by a 2-year parts warranty, ensuring durability and reliable performance.