Cummins QSK 19 Engine Parts - Piston Kit Section

Cummins QSK19 Engine Parts – Piston Kit Section

The Cummins QSK19 is a powerful and reliable high-performance diesel engine commonly used in heavy-duty industrial, mining, marine, and power generation applications. Designed for longevity and optimized combustion, this engine requires durable internal components, particularly when it comes to the pistons and related parts that are subjected to intense heat and pressure cycles. Diesel Pro Power offers a full range of piston kits and related components specifically designed to meet or exceed OEM specifications for the Cummins QSK19.

This section will guide you through the available piston kit options, compression ratios, compatible components like liners and ring sets, and helpful notes on installation and application matching. Whether you're performing a complete overhaul or simply replacing worn-out pistons, you’ll find high-quality solutions below.

Piston Kits for Cummins QSK19

13.9:1 Compression Ratio Piston Kit

One of the most commonly used piston configurations for the QSK19 engine is the 13.9:1 compression ratio. This kit is designed to deliver a strong balance between performance, fuel efficiency, and emissions control. It is compatible with multiple Cummins engine platforms, including the KTA19, KTA38, KTA50, and QSK19.

Features:

• Forged steel construction for superior strength under thermal and mechanical stress.

• Designed for engines operating under demanding load conditions, including generator sets, marine propulsion, and mining trucks.

• Fully machined crown and skirt for smoother operation and reduced wear.

Included Components:

• Piston

• Piston pin

• Retaining clips

• Optional ring set (can be ordered separately)

Typical CPL Coverage:
This piston kit is compatible with engines using CPL numbers such as 951, 968, 1170, 1219, 1251, 1253, 1254, 1319, 1430, 1455, and many others. Always verify your CPL number before selecting a piston kit to ensure precise fit and performance.

15.5:1 Compression Ratio Piston Kit (With Pin)

For users looking for higher compression and combustion efficiency, this 15.5:1 piston kit offers improved thermal performance and power density. The higher compression ratio is particularly suited for engines operating in high-altitude conditions or requiring maximum fuel atomization efficiency.

Key Attributes:

• Machined aluminum or forged steel alloy piston (depending on CPL and application).

• Compatible with both KTA19 and QSK19 engine variants.

• Enhanced durability for high-load, long-duration service cycles.

Designed CPL Numbers Include:
153, 159, 171, 183, 185, 213, 219, 232, 274, 290, 291, 293, 297, 302, and more.

Best For:

• Long-haul heavy transport

• Continuous-duty generator sets

• Marine propulsion under heavy load

• Industrial drilling rigs

Specialized QSK19 Piston Kits

Certain CPL configurations require unique piston kits tailored to highly specific applications or engine tuning characteristics. Diesel Pro Power offers piston kits that meet these needs without compromising performance or reliability.

Features Include:

• Heat-treated piston crowns

• Graphite-coated skirts to minimize friction

• Compatibility with later-generation QSK19 variants

CPL Support Includes:
2008, 2009, 2010, 2090, 2091, 2225, 2558, 2560, 2810, 8079, and others. These kits may also feature modified pin offsets or skirt designs for smoother operation.

Cylinder Liners for Cummins QSK19

The durability of a piston is directly tied to the condition and compatibility of the cylinder liner. Diesel Pro Power supplies standard-sized liners specifically matched to QSK19 engine specifications.

Standard Cylinder Liner Kit

Includes:

• Cylinder liner

• Integrated wear protection

• Compatible seal set (also sold separately)

Material:
Manufactured from centrifugally cast alloyed gray iron, hardened and honed for long-lasting wear resistance.

Cylinder Liner Seal Kits

Each liner must be installed with a fresh set of seals to maintain coolant isolation and prevent oil leaks.

Kit Contents:

• Upper and lower liner seals

• Compatible with QSK19 and KTA19 engines

Each seal kit is required per liner, so an 18-cylinder engine would require 18 kits for a full liner replacement.

Cylinder Liner Shims

Diesel Pro also offers liner height adjustment shims for fine-tuning protrusion during liner installation. This is especially important in high-compression engines like the QSK19, where gasket sealing depends on accurate liner protrusion measurements.

Specifications:

• Thickness: 0.0205 inches

• Used to meet or correct protrusion tolerances per Cummins rebuild specifications

Piston Ring Sets for QSK19

Each piston must be equipped with a properly matched ring set. Ring sets include:

• Compression rings

• Intermediate rings

• Oil control rings

Ring sets are available for standard pistons and are compatible across the KTA19, KTA38, KTA50, and QSK19 engine lines.

Usage Tip: Always verify bore and ring groove specifications before installation. Reusing old rings or installing mismatched ring sets can cause severe blow-by or oil consumption issues.

Choosing the Right Piston Kit for Your QSK19

Understanding Compression Ratios

The compression ratio is a key metric in determining engine performance and efficiency. In diesel engines, it indicates the volume difference between the top and bottom of the piston stroke. Higher compression ratios generally produce more thermal efficiency and power but may increase combustion temperatures and stress.

• 13.9:1 Ratio: Balanced performance, longevity, and compatibility with most industrial applications.

• 15.5:1 Ratio: Higher performance, ideal for engines requiring maximum torque and efficiency.

Both compression ratios have been rigorously tested for thermal stability, sealing integrity, and long service intervals when installed with the proper liner and ring combination.

CPL Matching Is Critical

The CPL (Control Parts List) number is unique to your engine’s configuration and must be matched with the correct piston kit. While some pistons may look visually similar, small differences in compression height, bowl shape, or pin offset can affect combustion timing and engine efficiency.

Diesel Pro Power recommends:

• Always verifying your engine’s CPL number before ordering.

• Consulting our technical support if uncertain about piston compatibility.

Engine Applications

The Cummins QSK19 is widely deployed across various sectors:

• Marine Engines: Tugboats, ferries, offshore support vessels

• Mining Equipment: Haul trucks, excavators

• Industrial Power Units: Large compressors, drilling rigs

• Generator Sets: Continuous or standby power in remote locations

The piston kits in this catalog are designed to endure the extreme demands of these applications, especially where high RPMs or sustained loading are involved.

Materials & Manufacturing

Pistons and related components are manufactured using:

• Forged Steel or Cast Aluminum Pistons: Depending on the CPL and application, both materials are engineered for specific heat tolerances and strength.

• Steel Piston Pins: Precision-ground and treated to resist flexing and wear.

• Liner Materials: Centrifugally cast ductile iron or alloyed gray iron with wear-resistant coatings.

• Rings: Chromium-ceramic coated for maximum wear life and oil control.

These kits are thoroughly inspected and manufactured under ISO-certified quality standards, ensuring consistent performance and long-term durability.

Rebuilding Tips for Cummins QSK19 Pistons

1. Inspect Liner Protrusion: Always measure liner height after installation. Inconsistent liner height can cause premature head gasket failure.

2. Use Correct Torque Values: During installation, piston pins and connecting rods must be torqued to Cummins factory specs.

3. Pre-Lube Ring Grooves: Before installing pistons, apply assembly lubricant to ring grooves and skirts to minimize scuffing.

4. Balance Assemblies: When replacing a single piston or a small group, ensure weight balance across all cylinders to prevent crankshaft vibration.

Why Choose Diesel Pro Power for Cummins QSK19 Piston Kits?

With over 40,000 satisfied customers worldwide, Diesel Pro Power is trusted by fleet operators, marine engineers, and industrial mechanics alike. We stock piston kits and components for all major Cummins heavy-duty engines, including the QSK19, and offer fast shipping, expert support, and guaranteed quality on every part.

We specialize in providing engine rebuild solutions that are:

• Engineered to OEM standards or higher

• Shipped quickly and securely

• Supported by bilingual technical support (English/Spanish)

When it's time to overhaul your Cummins QSK19, count on Diesel Pro Power for piston kits and components that keep your engine running strong.