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Cummins ISX, QSX Inframe-Overhaul Engine Rebuild Kit

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  • OEM Number: ISX-KIT
  • Brand: Reliance
    Brand Info x Close Reliance

    Every Reliance part is produced to exacting standards to ensure the same or better reliability as the original part. In fact, for older engines current technology is often so improved that the part we make available today may actually be better quality than the same part used to assemble the engine originally.

    New and remanufactured internal engine parts, complete cylinder heads and long block assemblies for agricultural and industrial applications supplied by RPP are warranted to be free from defects in material and workmanship under normal service and operating conditions for a period of one year from the date of installation without limitation on miles or hours of operation.

    Engine overhaul kits for heavy-duty on-highway applications supplied by RPP are warranted to be free from defects in material and workmanship under normal service and operating conditions for a period of two years from the date of installation without limitation on miles or hours of operation.

    Remanufactured clutch and non-engine parts are warranted to be free from defects in material and workmanship under normal service and operating conditions for a period of six months from the date of installation without limitation on miles or hours of operation.
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Free Shipping is only available in the United States (48 States).

Other shipping methods available at additional costs.

Additional fees apply to AK, HI and Canada.

$3,375.00
Price may change upon customization above.

WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

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Our parts meet and exceed the OEM specifications.

Details:

Parts Included In Engine Inframe Kit:
(6) Piston Kits (One Piece (see below), Rings, Wrist Pin, Pin Locks)
(6) Liner Kits (Liner with O-rings)
(1) Upper Gasket Set
(1) Oil Pan Gasket
(1) Pick Up Tube O-Ring
(6) Rod Bearings
(1) Main Bearing Set
(1) Bypass Valve, Plunger

*Agkits.com recommends adding the camshaft bearings to the rebuild kit. These bearings are almost always worn when it comes time to rebuild. Each set includes (4) 3680580 (3) 3680581 & (7) 4026423. View this products related products tab to add them.

Parts Included In Engine Overhaul Kit:
(6) Piston Kits (One Piece (see below), Rings, Wrist Pin, Pin Locks)
(6) Liner Kits (Liner with O-rings)
(1) Full Gasket Set
(1) Front Crankshaft Seal
(1) Rear Crankshaft Seal
(1) Pick Up Tube O-Ring
(6) Rod Bearings
(1) Main Bearing Set
(1) Bypass Valve, Plunger

*Agkits.com recommends adding the camshaft bearings to the rebuild kit. These bearings are almost always worn when it comes time to rebuild. Each set includes (4) 3680580 (3) 3680581 & (7) 4026423. View this products related products tab to add them.

Engines Kit K4352290 with Piston Kit 2881879 uses the Non-APR 150mm Liner. You can update to the APR liner by purchasing the K4376175 Inframe Kit with Piston Kit 4376243

Engines Kit K4352289 with Piston Kit 2881878 uses the Non-APR 150mm Liner. You can update to the APR liner by purchasing the K4376174 Inframe Kit with Piston Kit 4376244

Piston Liner Assembly Reference:

4089894 - Includes 1 Piece Steel Piston (Open Skirt with Radius Bowl. #4923743), Liner with Seal, Pin, Retainers & Ring Set. Use in Full Sets Only. Do Not Mix Piston numbers. Must be used with drilled connecting rods.

4089895 - Includes 1 Piece Steel Piston (Open Skirt with Chamfer Bowl. #4923744), Liner with Seal, Pin, Retainers & Ring Set. Use in Full Sets Only. Do Not Mix Piston numbers. Must be used with drilled connecting rods.

4955966 - Includes 1 Piece Steel Piston (Closed Skirt with Large 2.250 Center Bowl Configuration. #2863938), Liner with Seal, Pin, Retainers & Ring Set. Use in Full Sets Only. Do Not Mix Piston numbers. Must be used with drilled connecting rods.

4955967 - Includes 1 Piece Steel Piston (Closed Skirt with Small 1.930 Center Bowl Configuration. #2863939), Liner with Seal, Pin, Retainers & Ring Set. Use in Full Sets Only. Do Not Mix Piston numbers. Must be used with drilled connecting rods.

4955968 & 4089898 - This kit is for engines equipped with EGR. This popular EGR piston is used in, but not limited to, the following engine CPL numbers: 1437, 2732, 3229, 8287, 8288, 8520, 8523


Warning:There have been several updates to the components in the ISX15 / QSX15 engines since they were original introduced. Making sure you use compatible designed components in your build is critical to the service life of this engine.

All Pistons within the engine must be of the exact same design style. You cannot mix open skirt, closed skirt and 2 piece articulated pistons in the same engine. Also, all pistons must be installed facing the correct direction. Failure to align the deep valve pocket and the piston skirt cooling notch correct will result in extensive engine damage.

  • Engines produced before 2003 were built using 2 piece articulating pistons and traditional-type, solid beam connecting rods.
  • Engines produced during or after 2003 were built using upgraded, single piece open or closed skirt pistons and "Rifle Drilled" connecting rods. (Rod #4059449)  
    • Rifle Drilled Connecting rods have an oil hole drilled all the way along the inside of the shaft. This oil hole allows oil to flow to the piston pin connection. 



Earlier engines can be upgraded to the newer, single piece piston design, but you MUST USE RIFLE DRILLED CONNECTING RODS when installing single piece pistons. Non-drilled rods will not provide sufficient lubrication to the piston pin and can/will result in engine damage and/or failure. Rifle Drilled connecting rods for this application can be viewed / purchasedhere.


For all types of pistons within this platform, the manufacturer recommends a heavy film of 85w-140 gear oil with an EP (Extreme Protection) additive be applied to three specific areas during initial installation. Failure to lubricate these areas properly can result in engine damage and/or failure.
  1. Piston pin bore inside diameter
  2. Rod Bushing inside diameter
  3. Piston Pin




Engine Torque Specs:
Rod Bearing Torque: Used Bolts: 52 ft/lbs + 60 Degrees \ New Bolts: 29 ft/lbs, Loosen, Re-Torque 52 ft/lbs, +60 Degrees
Main Bearing Torque: Before engine serial number 79012120, 110 ft/lbs + 110 Degrees / After engine serial number 79012120, 300 ft/lbs, loosen, 300 ft/lbs + 90 Degrees
Intake Valve Lash .014" Cold
Exhaust Valve Lash .027" Cold
Cylinder Head Torque: 148 ft/lbs, 300 ft/lbs, +90 Degrees
Cylinder Head Torque Sequence ISX Cummins

© AGKITS a Nivel HD brand 2023. All manufacturer names, numbers, symbols & descriptions are for reference purposes only. It is not implied in any way that the items are a product of the manufacturer referenced. OEM makes are registered trademarks of their respective owners.

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