Cummins ISF3.8 cylinder head replacement (PN: 5258274). Factory supply alloyed cast iron, 100% tested. Fits Foton Aumark, GAZ Valdai, and VW Delivery 9.170. Prevents thermal cracking. ISO certified. Request quote!
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The Cummins ISF3.8 cylinder head (OEM: 5258274) is a premium alloyed cast iron component for 3.8L medium-duty engines.
It features reinforced valve bridges to resist thermal cracking and fits equipment including Foton Aumark trucks, GAZ Valdai, and VW Delivery 9.170/11.180 series.
Wholesale available for global export.
Eliminate downtime caused by overheating cracks and valve seat recession with Ruich Value’s heavy-duty replacement Cummins ISF3.8 Cylinder Head. Specifically engineered for the rigorous demands of medium-duty commercial transport, this cylinder head offers a definitive repair solution for Foton Aumark trucks, GAZ Valdai haulers, and PAZ Vector buses running the 3.8L common rail diesel platform.
Upholding the standard of Global Power Solutions and Industrial Durability, our cylinder heads are cast from high-grade, thermally stable iron alloy. This construction is crucial for withstanding the high combustion pressures and thermal cycling typical of Euro 3 and Euro 4 commercial engines. Unlike lightweight alternatives, our block-matched casting density ensures superior gasket sealing and structural integrity under heavy loads.
| Specification | Value |
|---|---|
| Product Type | Cylinder Head Assembly |
| Casting Material | High-Strength Alloyed Cast Iron |
| Valve Count | 16 Valves (4 per cylinder) |
| Combustion Chamber Type | Direct Injection (ISF Platform) |
| Surface Finish | Precision Milled (0.05mm Flatness) |
| Pressure Tested | 100% Hydraulic Tested (6.5 Bar) |
| Valve Seat Material | Heat-Resistant High-Nickel Alloy |
| OEM Reference | 5258274 |
| Cross Reference | 5262243, 5264129, 5308210 |
| Typical Applications | Foton Aumark, GAZ Valdai, VW Delivery 9.170, PAZ Buses |
| Application Category | Medium-Duty Logistics & Commercial Passenger Transport |
| Engine Model | Application Field | Verified Equipment Models |
|---|---|---|
| Cummins ISF3.8s3141 | Medium-Duty Trucks |
|
| Cummins ISF3.8s4168 | Commercial Transport (Russia/CIS) |
|
| Cummins ISF3.8s5168 | Buses & Transit |
|
Ruich Value is your comprehensive source for high-performance diesel cylinder heads. Beyond the ISF3.8, we supply durable replacements for a wide range of Cummins engine platforms.
Category coverage: Cummins 4BT & 6BT Cylinder Heads; ISDe & ISBe Series Heads; ISX15 & QSX15 Heavy-Duty Heads; KTA19 & KTA38 Heads.
| Model | Model | Model | Model |
|---|---|---|---|
| NTA855 (Assm) | ISF2.8 | ISX15/QSX15 | 6BTAA |
| K19 (Assm) | ISF3.8 (Assm) | ISLe (Assm) | 6CT/6CT (Assm) |
| 4B/4BT (Assm) | ISDe/QSB/ISB 4.5 | QSL | 6L/6LT (Assm) |
| 6B/6BT (Assm) | ISDe 6.7 / QSB6.7 (Assm) | ISM11 | QSB3.3/B3.3 (Assm) |
| ISB6 E3/E3 (Assm) | QSB 5.9L | ISG | ISL/T375 |
| ISBe 5.9 (Assm) | ISC (Assm) |
A1: Symptom: Fine cracks appearing between the valve seats or coolant consumption leading to overheating. Diagnosis: In 3.8L engines used for regional logistics (like Foton Aumark), high-load climbs and frequent heat cycles create intense thermal stress on the valve bridges. If the cooling system has even minor air pockets, the resulting hot spots cause localized fatigue. Solution: Our 5258274 replacement heads utilize a specific HT250 alloy with enhanced water jackets to improve thermal conductivity and prevent crack initiation under high EGT.
A2: Technical Detail: Main head bolts must be tightened in the exact 10-step sequence to a final angle of 180 degrees. Block flatness must be within 0.05mm. Pro-Tip: Never reuse ISF3.8 head bolts as they are torque-to-yield; reusing them leads to uneven clamping force, which will cause the 3.8L head to warp and blow the gasket under high common-rail injection pressures.
A3: Diagnosis: The ISF3.8 engine produces high peak torque, which can cause the cylinder head deck to flex or “deflect” slightly, leading to head gasket erosion. Our Solution: We implement an alloyed cast iron composition with increased copper and chromium content. This material chemistry ensures the 5258274 head maintains deck rigidity under the extreme combustion pressures of modern medium-duty diesel engines, preventing coolant intermix.
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