17331-21050 Piston Ring Set supports compression sealing and oil control for V2203 V2403 rebuilds and B2B excavator engine parts sourcing.
The 17331-21050 Piston Ring Set YNF18979 is supplied for compatible V2203 and V2403 diesel engine rebuilding applications. The piston rings are installed in the piston grooves and operate against the cylinder wall, where combustion sealing, lubricating-oil control, and heat transfer from the piston are supported during engine operation.
Piston rings are commonly inspected when an engine is being overhauled because ring wear, sticking, or loss of sealing performance can contribute to reduced compression, increased oil consumption, blow-by, and abnormal exhaust smoke.
For B2B buyers, the V2203 V2403 piston ring set should be confirmed by part number, engine model, piston specification, cylinder bore, and existing-part information before quantity purchasing. Accurate matching helps engine rebuilders and distributors reduce incorrect inventory, incomplete overhaul orders, customer returns, and repeated international freight costs.
| Parameter | Specification |
|---|---|
| YNF Part Number | YNF18979 |
| Part Number | 17331-21050 |
| Product Name | Piston Ring Set |
| Alternative Name | Engine Piston Rings / Compression Ring Set / Oil Control Ring Set |
| Product Type | Diesel Engine Internal Component |
| Parts Category | Engine / Piston & Cylinder Parts |
| Engine Model | V2203 / V2403 |
| Main Function | Compression Sealing / Oil Control / Heat Transfer |
| Application | Compatible Diesel Engine Rebuilding |
| Installation | Piston Ring Grooves / Cylinder Area |
| Material | Precision Metal Ring Set |
| Fitment Check | Part Number / Engine Model / Piston Specification / Cylinder Bore |
| Quality Type | Aftermarket Replacement |
| Condition | New |
| Brand | YNF |
| Origin | China |
| MOQ | 1 Set |
| Shipping Method | Air, Sea, Express |
| Payment Terms | T/T, PayPal, Western Union |
| Application | Description |
|---|---|
| V2203 Diesel Engine | Used in compatible piston and cylinder assemblies |
| V2403 Diesel Engine | Suitable where 17331-21050 fitment is confirmed |
| Engine Overhaul | Commonly replaced during diesel engine rebuilding |
| Compression Repair | Supports sealing between piston and cylinder wall |
| Oil Consumption Repair | Oil control function is restored with correctly matched rings |
| Piston Replacement | Can be renewed together with compatible pistons |
| Engine Rebuild Workshop | Suitable for professional diesel engine repair |
| B2B Parts Stocking | Practical for wholesalers, dealers, and importers |
Q: Which engines are associated with 17331-21050?
A: The supplied application references are V2203 and V2403.
Q: What does a piston ring set do?
A: It supports compression sealing, cylinder-wall oil control, and heat transfer from the piston.
Q: Is the piston included?
A: No. YNF18979 is identified as a piston ring set. The piston can be sourced separately if required.
YNF Machinery supplies 17331-21050 piston ring sets and related V2203 / V2403 engine rebuilding components for machinery dealers, repair workshops, wholesalers, and international importers.
The YNF18979 piston ring set is intended for compatible diesel engine overhaul requirements. Because piston rings depend on the correct piston and cylinder specifications, professional buyers should verify the full part number and engine application before ordering in quantity.
Buyers can provide the 17331-21050 reference, V2203 or V2403 engine information, required quantity, piston details, and existing-part photos for confirmation.
Pistons, piston pins, bearings, gasket kits, connecting rods, valves, seals, and other V2203 / V2403 engine parts can also be included in the same inquiry, helping B2B buyers consolidate overhaul parts and reduce fragmented sourcing.
