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It is an internal nozzle in the lubrication system that sprays engine oil toward the bottom of the piston; it draws oil from the engine block’s lubrication gallery and directs a jet toward the underside of the piston. It is installed inside the cylinder block, in the lower part of the cylinders, facing the underside of the piston. This component is typically made of metallic materials suitable for the oil circuit and the engine’s internal temperatures.
Typically used on Cummins 6C 8.3, 6CT 8.3, 6CTA 8.3, ISC 8.3, QSC 8.3, ISL 8.9 / 9, ISL Natural Gas, and QSL 8.9 / 9 engines.
Before placing an order, I always recommend checking the Cummins ESN (Engine Serial Number), CPL, and QuickServe catalog, because the same QSL/ISC/ISL model may use different nozzle variants depending on the year and configuration.
This is a diesel engine piston from the Cummins C-Series 8.3 L family, specifically for 6CTA8.3 turbocharged/aftercooled configurations. It is located in the engine cylinder/cylinder block. Its function is to transfer combustion pressure through the connecting rod to the crankshaft. It is made of an aluminum-alloy diesel piston; it features ALFIN’s reinforced ring-area configuration.
Engine: Cummins 6CTA8.3 / C8.3, selected CPLs
Verification using CPL/ESN is particularly important because, within the C-Series 8.3 family itself, there are pistons that look similar but have different applications and combustion geometries.
Piston Cummins Engine 6C Engine 6CT Engine 6CTA Engine ISC Engine QSC
It connects the piston to the connecting rod. It allows the piston and connecting rod to move relative to each other and transfers the combustion force to the connecting rod.
Confirmed applications: Cummins 6C, 6CT, 6CTA, 6CTAA; it is also documented for engines in the 6C/6C L family.
To ensure exact compatibility, I still recommend checking via ESN/CPL, because not all configurations use the same connector.
Identifies a piston pin retaining ring. It is a small but essential component of the piston-connecting rod assembly and is typically installed in pairs per piston, one on each side of the pin. Its function is to axially secure the piston pin within the piston seats. Spring-steel retaining ring.
It has a wide range of applications in the Cummins C / ISC / QSC / ISL / QSL / L family.
Check the Engine Serial Number (ESN) and CPL.
Liner w/o Sealing Ring Cummins Engine 6C 8.3- Cummins Engine 6CT 8.3-Cummins Engine 6CTA 8.3
The cylinder liner is installed inside the cylinder block, forming the cylindrical surface along which the piston moves. The kit is designed to provide the piston’s sliding surface, maintain the correct cylinder geometry, rebuild the cylinder during an engine overhaul, and ensure a proper seal using the included sealing elements. The kit includes a cylinder liner and a liner seal.
Installed on Cummins 6C/L Series, ISC 8.3/L, QSC 8.3/L, ISL 8.9/9, and QSL 8.9 engines.
Generally manufactured up to 1990 / before the 1991 block modifications. To avoid errors, I recommend verifying at least one of the following: Engine Serial Number (ESN), CPL, Cummins QuickServe catalog, block casting number, engine production year, original cylinder liner dimensions, and the number stamped on the old cylinder liner. In particular, it is important to distinguish the early pre-1991 block from later versions.
The cylinder liner forms the cylindrical surface along which the piston and piston rings slide. It maintains the correct geometry of the cylinder, transfers heat to the engine block, and allows the engine to be rebuilt without having to replace the entire engine block. It is specified as a flanged cylinder liner and is supplied without sealing rings.
Cummins 6C-Series engines are also used in power plants, including the ISC 8.3, QSC 8.3, ISL 8.9 / 9, and QSL 8.9 / 9 models.
ESN – Engine Serial Number, CPL, Cummins QuickServe/OEM catalog, complete engine model and CM, stamped/cast number on the old liner, dimensional comparison of inner diameter/flange/length, or confirmation from Cummins.
The kit is installed inside the engine block. The cylinder liner fits into the block’s bore; inside the liner, the piston, piston pin, connecting rod, and crankshaft operate. It forms the thermal assembly of the individual cylinder and must contain combustion pressure, guide the piston, ensure compression sealing, control the oil film via the piston rings, and maintain the correct piston-to-liner clearance. The complete Cummins cylinder kit for engines in the C Series 8.3 L family, or industrial/on-highway/off-highway applications using the correct 8.3 L block configuration, with STD configuration, for the late thick-walled cylinder block #3934899, effective 01/05/1998.
It is used in Cummins 6C 8.3 L, 6CT 8.3 L, 6CTA 8.3 L, ISC 8.3, QSC 8.3, ISL 8.9/9, and QSL 8.9/9 engines.
Compatibility varies by engine CPL, ESN, piston configuration, and cylinder block. Verify the engine serial number before ordering. This wording allows you to correctly include QSL, ISL, QSC, and ISC without incorrectly stating that it fits all of these engines. Cummins itself recommends identifying parts by ESN/CPL and piston configuration.
Piston Cooling Nozzle Cummins Engine 6CT 8.3
Piston w/Retainer & Rings – ST Cummins Engine 6C.83-Engine 6CTA.83
Engines with CPL numbers: 1216, 1217, 1221, 2172.
Included :
• Piston
• Piston pin
• Piston pin retainer
• Piston ring set
Piston w/Retainer & Rings – ST Cummins Engine 6C.83-Engine 6CT.83-Engine 6CTA.83
Engines with CPL numbers:604, 754, 755, 830, 831, 393, 959, 982, 984, 1212, 1222, 1270, 1273, 1321, 1377, 1419, 1612, 1633, 1639, 1903, 2058.
.Included :
• Piston
• Piston pin
• Piston pin retainer
• Piston ring set
Piston w/Retainer & Rings – ST Cummins Engine 6C.83-Engine 6CT.83-Engine 6CTA.83
Engines with CPL numbers:8159, 8220, 8430, 8494, 8535, 8536, 8537, 8538, 8539, 8569, 8570, 8626, 8627, 8630, 8631, 8632, 8633, 8634, 8635, 8636, 8637, 8639, 8692, 8697, 8698, 8728, 8729, 8730, 8745, 8746.
.Included :
• Piston
• Piston pin
• Piston pin retainer
• Piston ring set
Piston w/Retainer & Rings – ST Cummins Engine 6C.83-Engine 6CT.83-Engine 6CTA.83
Engines with CPL numbers: 602, 603, 753, 819, 828, 955, 985, 1248, 1274, 1275, 1281, 1356, 1464, 1661, 1988, 2035, 2161, 2162, 2182, 2183, 2284, 2285, 2343, 2344, 2406, 2407, 2408, 2409, 2410, 2411, 2413, 2544, 2545, 2620.
Included :
• Piston
• Piston pin
• Piston pin retainer
• Piston ring set
Piston w/Retainer & Rings – STD- Cummins Engine 6C.83-Engine 6CT.83-Engine 6CTA.83 Cummins Engine L10
Engines with CPL numbers: 393, 604, 754, 755, 830, 831, 893, 959, 982, 984, 1212, 1222, 1270, 1273, 1321, 1377, 1419, 1612, 1633, 1639, 1903, 2058.
Included :
• Piston
• Piston pin
• Piston pin retainer
• Piston ring set
Used on Cummins engines in the ISL/QSL family and in 8.3–9 L applications. Located in the piston. Its function is to seal against combustion pressure, control lubricating oil, and transfer heat from the piston to the cylinder wall. Made of special steel/cast iron for piston rings.
Engines: Cummins ISL9, ISL/ISLe, QSL/QSL9; 6C8.3/GTA8.3 in some applications.
When purchasing a replacement engine, I recommend checking the ESN and CPL, because Cummins may use different piston/piston ring configurations within the same ISL/QSL family.
Ring Set, Single Cylinder – ST Cummins Engine 6C 8.3- Cummins Engine 6CT 8.3-Cummins Engine 6CTA 8.3
This is a set of piston rings. They perform three essential functions: they seal the combustion pressure between the piston and the cylinder, control the oil film on the cylinder wall, and help transfer heat from the piston to the cylinder.
Used on Cummins C Series, ISC 8.3, QSC 8.3, ISL, and QSL/QSL9 engines.
For QSL/ISL/ISC/QSC, it’s always a good idea to check the ESN and CPL, because the same engine may use different pistons and ring configurations depending on the version and model year.
It is mounted in the lower section/seal area of the cylinder liner, between the liner and the engine block. It is part of the cylinder liner sealing system. Its main function is to seal the cylinder liner against the engine block, prevent coolant from flowing into unintended areas, prevent contamination between coolant and engine oil, and maintain proper sealing of the cylinder liner during the engine’s thermal cycles.
Verified compatible Cummins engines: 6C 8.3, 6CT 8.3, 6CTA 8.3, ISC 8.3, QSC 8.3, ISL 8.9/9, QSL 8.9/9.
I recommend verifying compatibility using the ESN (Engine Serial Number), CPL, QuickServe/Cummins Catalog, cylinder liner number, block number/casting number, engine year/configuration, and a dimensional comparison of the ring.