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?
The 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)
| Part Number | Part Description | Required Qty | Remarks / Function |
| 4376509 | Upper Engine Gasket Set | 1 Kit | Master Repair Solution |
| 5345648 | Cylinder Head Gasket | 1 | Multi-Layer Steel (MLS) Seal |
| 4946239 | Valve Cover Gasket | 1 | Top Cylinder Head Seal |
| 3955393 | Valve Stem Seal | 16 | Intake & Exhaust Valve Control |
| 2830444 | Exhaust Manifold Gasket | 4 | Primary Exhaust Seal |
| 5266422 | Exhaust Manifold Gasket | 2 | Exhaust Connection Seal |
| 4983020 | Intake Manifold Gasket | 1 | Air Intake Efficiency Seal |
| 5303597 | Turbocharger Gasket | 1 | Turbo Mounting & Pressure Seal |
| 5253019 | EGR Valve Gasket | 1 | Emission System Sealing |
| 5264571 | Oil Drain Gasket | 1 | Turbo Oil Return Protection |
| 4940584 | Grommet Seal | 4 | Specialized Component Sealing |
| 4932615 | Connection Gasket | 1 | External Fitting Seal |
| 4995186 | Exhaust Outlet Connection Gasket | 1 | Connection System Gasket |
| 5301826 | O-Ring Seal | 1 | High-Temp Oil/Coolant Seal |
| 5259924 | O-Ring Seal | 1 | High-Temp Oil/Coolant Seal |
| 5259563 | O-Ring Seal | 1 | High-Temp Oil/Coolant Seal |
| 5257072 | O-Ring Seal | 1 | High-Temp Oil/Coolant Seal |
| 3867646 | O-Ring Seal | 1 | High-Temp Oil/Coolant Seal |
| 3090126 | O-Ring Seal | 1 | High-Temp Oil/Coolant Seal |
| 2898295 | O-Ring Seal | 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
The 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 Foton Aumark Gasket system.
Precision Sealing with 3955393 Valve Stem Seals
The 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 Foton Aumark Gasket system.
3. Application & Compatibility Summary
The 4376509 Upper Engine Gasket Set is perfectly suited for high-performance diesel applications, especially where a reliable Foton Aumark Gasket 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. Why Partner with Hubei Yizhi Power?
Based in Shiyan, the heart of the Cummins supply chain, Hubei Yizhi Power Technology Co., Ltd. ensures that every 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 Engine Serial Number (ESN) to our team for a 100% fitment guarantee on your 5345648 Head Gasket.
Request a Professional Quote Today
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
- Email: stevencummins8989@gmail.com
- Official Web: www.yzdlparts.com
