Cummins KTA 50 Engine Parts - Rebuild Kit Section

Cummins KTA50 Engine Overhaul Kits & Related Parts Catalog

The Cummins KTA50 engine is a powerhouse designed for extreme-duty applications across marine, mining, oilfield, and power generation environments. As one of Cummins' most robust and reliable high-horsepower platforms, the KTA50 delivers exceptional durability, performance, and long-term value. However, even the most reliable engines require overhaul and preventative maintenance to stay in top operating condition.

At Diesel Pro Power, we supply high-quality Cummins KTA50 overhaul kits and related parts specifically tailored to the needs of professional mechanics, fleet operators, and industrial users around the world. With over 40,000 satisfied customers globally, our team is trusted for fast shipping, expert support, and industry-best quality on all Cummins rebuild components.

Engine Overview: Cummins KTA50 Platform

The Cummins KTA50 engine is a 50-liter, V16, four-stroke diesel engine built to operate continuously in demanding conditions. Known for its versatility and power, the KTA50 is found in both mobile and stationary equipment including marine propulsion systems, mining haul trucks, power generation stations, and heavy-duty industrial pumps.

Key Specifications:

• Displacement: 50.3 liters (3,071 cubic inches)

• Configuration: V16

• Aspiration: Turbocharged and Aftercooled (varies by CPL)

• Fuel System: Direct injection, PT fuel system

• Bore & Stroke: 159 mm x 159 mm (6.25 in x 6.25 in)

• Compression Ratios: 13.9:1 or 14.5:1 depending on CPL

• Horsepower Range: 1,250 – 1,800+ HP (varies by CPL and application)

Because these engines operate under high stress and long durations, timely rebuilds using high-quality components are essential to maintain output, efficiency, and compliance with emissions standards.

Rebuild Kit Options for Cummins KTA50 Engines

We offer two primary overhaul kit options for Cummins KTA50 engines. Each is carefully curated to match specific CPL (Control Parts List) numbers and includes all essential components required for a major in-frame or out-of-frame rebuild.

Overhaul Kit for Cummins KTA50 – 13.9:1 Compression Ratio

This rebuild kit is engineered for KTA50 engines configured with a 13.9:1 compression ratio, ideal for applications where long operating cycles are standard, such as power generation and stationary pumping. The lower compression ratio results in smoother combustion with reduced engine stress, especially under full load conditions.

Compatible CPL Numbers:
968, 1219, 1254, 1528, 1544, 1657, 2159, 2227, 2527, 2533, 6229, 6230, 6231, 6240, 6241

Included Components:

• One-piece or two-piece piston assemblies (as required by CPL)

• Piston rings

• Cylinder liners

• Connecting rod bearings

• Main bearings

• Thrust washers

• Cylinder head gaskets and upper gasket sets

• Lower gasket sets including crankcase seals

• Injector O-rings and copper washers

• Camshaft bushings (where applicable)

All components meet or exceed OEM specifications and are inspected for dimensional tolerances, metallurgy, and durability under high load.

Overhaul Kit for Cummins KTA50 – 14.5:1 Compression Ratio

This rebuild kit is suited for KTA50 configurations with a 14.5:1 compression ratio, typically found in marine propulsion systems, heavy-haul mining equipment, and fast-start generator sets. The higher compression ratio provides improved combustion efficiency and power density.

Compatible CPL Numbers:
313, 343, 368, 522, 526, 546, 687, 688, 736, 737, 738, 853, 854, 862, 863, 870, 871, 874, 875

Benefits of Higher Compression:

• Improved thermal efficiency

• Increased torque at low RPM

• More responsive throttle performance

• Better fuel economy (in some load ranges)

Kit Features:

• High-strength pistons engineered for higher cylinder pressure

• Heat-resistant ring sets for extended wear life

• Gasket materials rated for elevated combustion temperatures

• Precision-ground crankshaft bearings

Understanding Compression Ratios in Rebuild Kits

Choosing the correct rebuild kit involves understanding the compression ratio. This number represents the ratio between the cylinder volume when the piston is at bottom dead center (BDC) and the volume when it’s at top dead center (TDC). In the KTA50 series:

• 13.9:1 Compression Ratio: Lower peak combustion pressure, ideal for longevity in fixed-speed applications.

• 14.5:1 Compression Ratio: Higher peak pressure for increased power, suitable for high-output, mobile applications.

Installing a kit with the correct compression ratio is essential for engine performance, emissions compliance, and reliability. Using the wrong kit can lead to premature wear, knock, or failure.

Additional Components for a Complete Overhaul

While the core rebuild kit covers the main internal components, Diesel Pro Power also supplies supporting parts necessary for a thorough rebuild. Below are some of the essential components typically replaced during an overhaul:

Crankshaft Seal Kits (Front and Rear)

Preventing oil leaks at the crankshaft is essential for engine cleanliness and longevity. We offer front and rear seal kits that include both the seal and wear sleeve, designed to ensure tight sealing and long service life.

• Maintains oil pressure integrity

• Protects against contaminants entering the crankcase

• Helps maintain consistent oil consumption

Turbo Mounting Gaskets

If the turbocharger is removed during the rebuild, replacing its mounting gaskets is a must. Our gaskets are designed for water-cooled turbos and provide proper sealing to avoid boost leaks or coolant intrusion.

Exhaust Manifold Gaskets

Our exhaust manifold outlet connection gaskets are heat-rated and reinforced for durability. Proper exhaust sealing is critical to maintaining back pressure and avoiding turbo inefficiency.

Maintenance Filters for Cummins KTA50

New oil and fuel filters are a necessity after a full overhaul. We stock:

• Oil Filters: Spin-on style with proper flow ratings for high-output Cummins engines.

• Fuel Filters: Including water separators to trap moisture before it reaches injectors.

• Feeler Gauges: For valve lash calibration during final assembly.

Regular maintenance intervals are critical after the engine is rebuilt to ensure long-term protection and optimal break-in.

Recommended Tools for KTA50 Rebuilds

Professional results require professional tools. We offer the following:

Piston Ring Assembly Tool

Essential for compressing piston rings evenly during reassembly. Prevents breakage or distortion, ensuring a proper seal.

Fuel Filter Removal Wrench

Specialized wrench designed for high-torque removal of fuel filters, compatible with both Cummins and Detroit Diesel engines.

Oil Filter Removal Wrench

Adjustable wrench compatible with large-diameter spin-on oil filters. Useful in tight engine compartments or confined service spaces.

Radiator Cleaner

Used after engine reassembly to flush contaminants and buildup from the cooling system. Ensures efficient heat transfer and prevents overheating post-rebuild.

Engine Monitoring Accessories

Following a rebuild, monitoring engine health is more important than ever. We offer:

• Mechanical Gauges: For accurate real-time readings of oil pressure, coolant temperature, and RPMs.

• Electrical Gauges: Available in both 12V and 24V configurations with alarms for automated alerts.

These gauges help you ensure safe break-in conditions and spot potential issues early.

Why Choose Diesel Pro Power for Your Cummins KTA50 Rebuild?

With thousands of successful rebuilds supported across over 40,000 global customers, Diesel Pro Power has built a reputation for:

• Fast, Worldwide Shipping: Most items ship within 24 hours from our warehouse.

• Engine-Specific Kits: All kits are organized by CPL, ensuring fit and function.

• Expert Technical Support: Bilingual support team with extensive Cummins experience.

• Trusted by Professionals: Marine fleets, mining contractors, and industrial operations rely on us every day.

When it comes to heavy-duty diesel rebuilds, every detail counts. From compression ratios to sealing surfaces, Diesel Pro Power delivers precision and performance in every component we ship.