As a leading commercial vehicle parts supplier, Hubei Yizhi Power Technology Co., Ltd. provides this technical analysis of the 4376509 Upper Engine Gasket Set. For technicians and fleet managers, choosing a high-quality Cummins ISF3.8 Gasket Kit is the only way to ensure a 100% leak-proof engine rebuild and long-term operational reliability.

1.Complete Parts List: What is in the Cummins ISF3.8 4376509 Kit?
Сайт 4376509 Upper Engine Gasket Set is a comprehensive “top-set” for the Cummins ISF3.8 series diesel engines. It contains over 50 individual sealing components across 21 unique part types, ensuring every seal required for a cylinder head overhaul is included in this single ISF3.8 engine parts solution.
Technical Specification Table (Full Component List)
| Номер детали | Описание детали | Required Qty | Remarks / Function |
| 4376509 | Комплект верхних прокладок двигателя | 1 Kit | Master Repair Solution |
| 5345648 | Прокладка головки цилиндра | 1 | Multi-Layer Steel (MLS) Seal |
| 4946239 | Прокладка клапанной крышки | 1 | Top Cylinder Head Seal |
| 3955393 | Valve Stem Seal | 16 | Intake & Exhaust Valve Control |
| 2830444 | Прокладка выпускного коллектора | 4 | Primary Exhaust Seal |
| 5266422 | Прокладка выпускного коллектора | 2 | Exhaust Connection Seal |
| 4983020 | Прокладка впускного коллектора | 1 | Air Intake Efficiency Seal |
| 5303597 | Прокладка турбокомпрессора | 1 | Turbo Mounting & Pressure Seal |
| 5253019 | EGR Valve Gasket | 1 | Emission System Sealing |
| 5264571 | Oil Drain Gasket | 1 | Turbo Oil Return Protection |
| 4940584 | Герметичное уплотнение | 4 | Specialized Component Sealing |
| 4932615 | Прокладка для соединения | 1 | External Fitting Seal |
| 4995186 | Exhaust Outlet Connection Gasket | 1 | Connection System Gasket |
| 5301826 | Кольцевое уплотнение | 1 | High-Temp Oil/Coolant Seal |
| 5259924 | Кольцевое уплотнение | 1 | High-Temp Oil/Coolant Seal |
| 5259563 | Кольцевое уплотнение | 1 | High-Temp Oil/Coolant Seal |
| 5257072 | Кольцевое уплотнение | 1 | High-Temp Oil/Coolant Seal |
| 3867646 | Кольцевое уплотнение | 1 | High-Temp Oil/Coolant Seal |
| 3090126 | Кольцевое уплотнение | 1 | High-Temp Oil/Coolant Seal |
| 2898295 | Кольцевое уплотнение | 1 | High-Temp Oil/Coolant Seal |
| 3963990 | Sealing Washer | 5 | Bolt & Fitting Compression Seal |
| 3684342 | Sealing Washer | 9 | Bolt & Fitting Compression Seal |
| 3918187 | Sealing Washer | 1 | Drain Plug/Fitting Washer |
2. Expert Analysis: Why the 4376509 Kit is Critical for Performance
MLS Technology in 5345648 Head Gasket
Сайт 5345648 Head Gasket included in this 4376509 Upper Engine Gasket Set features Multi-Layer Steel (MLS). This is vital for the ISF3.8’s high-pressure combustion cycle, preventing cylinder gases from escaping into the water jacket—the primary cause of engine overheating in vehicles using the Прокладка Foton Aumark system.
Precision Sealing with 3955393 Valve Stem Seals
Сайт 5345648 Head Gasket included in this 4376509 Upper Engine Gasket Set features Multi-Layer Steel (MLS). This is vital for the ISF3.8’s high-pressure combustion cycle, preventing cylinder gases from escaping into the water jacket—the primary cause of engine overheating in vehicles using the Прокладка Foton Aumark system.
3. Application & Compatibility Summary
Сайт 4376509 Upper Engine Gasket Set is perfectly suited for high-performance diesel applications, especially where a reliable Прокладка Foton Aumark or ISF3.8 engine parts are required:
- Commercial Trucking: Foton Aumark, Olins, JAC, and GAZ Valdai.
- Public Transport: Light and medium-duty transit buses.
- Industrial: Diesel generators and Construction Equipment (Excavators/Loaders).
4. Почему стоит сотрудничать с Hubei Yizhi Power?
Based in Shiyan, the heart of the Cummins supply chain, Hubei Yizhi Power Technology Co., Ltd. гарантирует, что каждый 4376509 Upper Engine Gasket Set meets strict OEM quality benchmarks.
- Verified Accuracy: Every Cummins ISF3.8 Gasket Kit contains the full range of 50+ seals to prevent assembly delays.
- Stable Supply: Massive inventory for all ISF3.8 engine parts ensures zero lead time for urgent repairs.
- ESN Verification: Provide your Серийный номер двигателя (ESN) to our team for a 100% fitment guarantee on your 5345648 Head Gasket.
Запросите профессиональное предложение сегодня
Maximize your engine’s service life with a reliable 4376509 Upper Engine Gasket Set. For bulk orders of the Cummins ISF3.8 Gasket Kit, contact us today.
- WhatsApp: +86 186 7197 8898
- Электронная почта: stevencummins8989@gmail.com
- Official Web: www.yzdlparts.com




