When it comes to maintaining the horsepower and durability of the Cummins K50 series, the quality of internal combustion components is non-negotiable. Whether you are performing a mid-life repair or a complete engine overhaul, using the correct Part Number 3630916 or its compatible version 3804885 ensures your power units remain efficient under heavy load.
As a specialized supplier of heavy-duty engine solutions, we provide Brand New and OEM Standard Replacement pistons designed specifically for high-stress industrial environments where KTA50 engines operate.
| Model NO. | Cummins K50 / KTA50 / KTA50-G3 / KTA50-G8 | Part Number | 3630916 / 3804885 |
|---|---|---|---|
| Product Name | Engine Piston | Type | Articulated / Single Piece Piston |
| Condition | Brand New, OEM Standard Replacement | MOQ | 1 Piece |
| Stock Status | In Stock / Fast Dispatch | Application | Engine rebuild, overhaul, maintenance |
| Payment Terms | T/T, Western Union, MoneyGram | ||
| Delivery Methods | Express: DHL Fedex EMS UPS or by Air / Sea | ||
| Packaging | Industrial Export Packing (Protective Coating + Individual Box) | ||
Don't settle for substandard parts that risk catastrophic engine failure. Here is how our supply compares to standard aftermarket options:
| Ref No. | Core Procurement Points | Our OEM-Standard Replacement | Low-Quality Alternatives |
|---|---|---|---|
| 1 | Material Composition | High-strength forged steel / aluminum alloy | Recycled casting material |
| 2 | Heat Resistance | Withstands extreme thermal loading in K50 cycles | Prone to crown cracking and melting |
| 3 | Dimensional Precision | Exact 3630916 specifications for ring groove fit | Loose tolerances causing blow-by |
| 4 | Surface Treatment | Phosphate coating for break-in protection | Rough finish leading to cylinder liner wear |
| 5 | Reliability | Verified 10,000+ hour service life potential | Unpredictable failure within months |
| 6 | Availability | Immediate stock for P/N 3804885 | Long lead times or "out of stock" |
Our technical team helps fleet operators and mechanics solve complex engine issues before they become expensive failures:
Identify potential risks during routine maintenance inspections.
Recommend suitable replacement parts based on your specific engine serial number (ESN).
Support both inspection advice and global parts supply.
Reach out to our technicians today for a free part-matching verification.
Q1: Why is my K50 engine experiencing excessive blue smoke and oil consumption?
A: This is often caused by worn piston rings or damaged ring grooves on the 3630916 piston. When the grooves widen, the rings can no longer seal against the liner, allowing oil to enter the combustion chamber. We recommend a full piston and liner kit inspection during your next maintenance interval.
Q2: Can I use part number 3804885 to replace 3630916?
A: Yes, in most KTA50 configurations, 3804885 is the updated or compatible assembly for 3630916. However, it is always best to provide your Engine Serial Number (ESN) so we can confirm the exact fitment for your piston cooling nozzle alignment.
Q3: What causes piston crown cracking in high-kilowatt generator sets?
A: Cracking is usually due to thermal fatigue or "over-fueling" issues. Using an OEM-standard tri-metal structure piston ensures the component can handle the rapid temperature cycles without structural failure. This is why our parts are trusted by repair shops and equipment fleets worldwide.
Q4: Why Choose This Piston (3630916 / 3804885)?
A: Our pistons feature an OEM-standard tri-metal structure and enhanced cooling galleries. They are trusted by repair shops and equipment fleets for their ability to restore factory-spec compression and fuel efficiency to aging K50 blocks.
We are a leading provider of comprehensive engine solutions, specializing in high-performance parts for the world's most reliable machinery. Our inventory covers a wide range of needs from basic maintenance to heavy-duty industrial rebuilds.
Our core expertise includes supplying components for Cummins, Komatsu, Caterpillar, Isuzu, Kubota, Yanmar, and Weichai. We focus on delivering full engine assemblies and precision-engineered spare parts.
Cylinder Liners, Pistons, Piston Rings, Main Bearings (Crankshaft Bearings), Con Rod Bearings, Thrust Washers, Overhaul Gasket Kits, Fuel Injection Pumps, Fuel Injectors, Crankshafts, Turbochargers, Water Pumps, Oil Pumps, Cylinder Blocks, Cylinder Heads, Connecting Rods.
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