Expert Reliability for Heavy-Duty Performance. Part Numbers: 2128917 / 2418388
When your CAT engine starts losing compression or showing signs of valve recession, the solution isn't just "any" part—it is about getting the exact fit. We provide premium 212-8917 (2128917) and 241-8388 (2418388) exhaust valve seats designed to withstand extreme thermal cycles and high-pressure environments.
Whether you are performing a routine overhaul or a complete engine rebuild, our CAT 212-8917 Replacement ensures your cylinder head maintains a perfect seal, preventing expensive downtime and catastrophic engine failure.
Follow Our Latest Engine Parts Updates on FacebookNot all valve seats are created equal. Below is a professional comparison of our CAT-series replacement seats versus standard aftermarket options.
| Core Procurement Points | Standard Aftermarket | Our OEM-Standard Replacement |
|---|---|---|
| 1. Material Composition | Basic Cast Iron | High-Nickel Heat Resistant Alloy |
| 2. Thermal Conductivity | Average | Optimized for Rapid Heat Dissipation |
| 3. Wear Resistance | Low - Fast Recession | Superior Surface Hardness (Rockwell C Scale) |
| 4. Machining Precision | ±0.05mm | ±0.01mm for Instant Press-Fit |
| 5. Part Number Match | Generic Sizing | Exact Match for 212-8917 & 241-8388 |
| 6. Service Life | 8,000 Hours | 15,000+ Hours (Tested Performance) |
| Model NO. | CAT Engine Series Replacement |
| Product Name | Exhaust Valve Seat Insert |
| Part Number | 212-8917 / 2128917 & 241-8388 / 2418388 |
| Type | High-Performance Cylinder Head Components |
| Condition | Brand New, OEM Standard Replacement |
| MOQ | 1 Piece |
| Stock Status | In Stock / Fast Dispatch Globally |
| Payment Terms | T/T, Western Union, MoneyGram |
| Delivery Methods | Express: DHL Fedex EMS UPS or by Air / Sea |
| Packaging | Industrial Export Packing (Protective Coating) |
| Application | Engine rebuild, overhaul, maintenance for Construction & Power Systems |
Compression loss is often caused by valve seat recession. High combustion temperatures can "sink" the valve into the seat. Using our 241-8388 seat with its superior heat-treated alloy prevents this sinkage, maintaining the proper valve lash and power output.
During head inspection, check for micro-cracks or pitting on the seat surface. If the seat shows a width exceeding OEM specifications or if the valve stem height is out of range, it is time for a new 2128917 insert to restore factory-spec geometry.
Our seats feature an OEM-standard tri-metal structure. This is why we are trusted by repair shops & equipment fleets worldwide for heavy-duty Caterpillar engine restorations.
Get a quick quote for your specific project. Click below to start.
Send Your Part Number InquiryWe are a leading supplier of heavy-duty engine solutions, specializing in Caterpillar, Cummins, Komatsu, Isuzu, Kubota, Yanmar, and Weichai power units. Our inventory covers full engine assemblies and critical internal components including Cylinder Liners, Pistons, Piston Rings, Main Bearings, Connecting Rod Bearings, Thrust Washers, and Overhaul Gasket Kits. We also supply high-pressure Fuel Injection Pumps, Injectors, Crankshafts, Turbochargers, Water Pumps, Oil Pumps, Cylinder Blocks, Cylinder Heads, and Connecting Rods.
Explore more solutions: Caterpillar engine rebuild kits, Komatsu excavator engine overhaul, Cummins diesel engine spare parts, Isuzu industrial engine components, Kubota tractor engine parts, Yanmar marine engine spares, Weichai truck engine accessories, Cylinder liner installation guide, Piston ring gap clearance, Crankshaft bearing torque specs, Heavy duty turbocharger replacement, Fuel injector calibration service, Water pump leakage solutions, Oil pump pressure testing, Cylinder head resurfacing parts, Marine engine maintenance supplies, Mining equipment engine repairs, Generator set engine components, Forklift engine replacement parts, Agricultural machinery engine overhaul.
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