The 5255257 piston (also known as 5255257) is the standard replacement part for Cummins QSB6.7 diesel engines. Designed for heavy-duty industrial and construction machinery, this piston ensures restored engine power and compression efficiency.
| Model NO. | QSB6.7 / QSB 6.7 | Part Number | 5255257 |
| Product Name | Engine Piston | Type | Diesel Engine Component |
| Condition | Brand New / OEM Standard | MOQ | 1 Piece |
| Application | Overhaul / Maintenance | Stock Status | In Stock |
| Payment | T/T, WU, MoneyGram | Delivery | DHL, Fedex, UPS, Air/Sea |
| Selection Criteria | Our OEM Standard 5255257 | Cheap Aftermarket Parts |
|---|---|---|
| 1. Material | Heat-resistant Forged Alloy | Low-grade Casting Aluminum |
| 2. Precision | Standard QSB6.7 Tolerance | Frequent Sizing Deviations |
| 3. Durability | Long Service Life (10,000+ hrs) | Risk of Early Piston Scuffing |
| 4. Combustion | Optimized Bowl Design | Poor Fuel Efficiency |
| 5. Coating | Hard Anodized Top | No Protective Coating |
| 6. Fitting | 100% Drop-in Replacement | Requires Manual Modification |
Not sure how this issue affects your equipment? Our technical team is ready to assist you:
Identify potential risks during engine maintenance
Recommend suitable replacement parts based on ESN
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Q: Why choose this Piston?
A: It features an OEM-standard tri-metal structure, making it the top choice for repair shops and equipment fleets requiring 100% reliability.
Q: Solving QSB6.7 Engine Knocking?
A: Engine knocking in QSB6.7 units is often caused by 5255257 piston crown erosion or ring land wear. Replacing the assembly restores timing and combustion stability.
Q: Dealing with Blue Smoke?
A: If your engine emits blue smoke, oil is bypassing the piston rings. Using high-precision 5255257 pistons with new rings solves oil consumption issues effectively.
We supply Engine Assembly and spares for Cummins, Komatsu, Caterpillar, Isuzu, Kubota, Yanmar, and Weichai. Our main products include: Cylinder Liners, Pistons, Piston Rings, Crankshafts, Main Bearings, Overhaul Gasket Kits, Fuel Pumps, Injectors, Turbochargers, and Cylinder Heads.
Keywords: QSB6.7 Overhaul Kit, Cummins 5255257 Price, Heavy Equipment Piston Supplier, Excavator Engine Repair Parts, Marine Diesel Maintenance, Diesel Piston Manufacturer, QSB 6.7 Rebuild Parts, Industrial Engine Spares, Piston Ring Land Repair, High-Pressure Piston Kit, 5255257 Wholesale, Engine Block Components, Turbocharger Replacement, Diesel Injector Service, Crankshaft Bearing Set, Water Pump for Cummins, Oil Pump Replacement, Liner Kit Supplier, Gasket Set Overhaul, Professional Engine Parts.
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