{"id":2319,"date":"2026-03-24T02:55:54","date_gmt":"2026-03-24T02:55:54","guid":{"rendered":"https:\/\/yzdlparts.com\/?p=2319"},"modified":"2026-03-24T03:41:23","modified_gmt":"2026-03-24T03:41:23","slug":"__trashed-7","status":"publish","type":"post","link":"https:\/\/yzdlparts.com\/ar\/__trashed-7\/","title":{"rendered":"Ultimate Guide to the 4376509 Upper Engine Gasket Set for Cummins ISF3.8"},"content":{"rendered":"

As a leading commercial vehicle parts supplier, Hubei Yizhi Power Technology Co., Ltd.<\/strong> provides this technical analysis of the 4376509 Upper Engine Gasket Set<\/strong>. For technicians and fleet managers, choosing a high-quality \u0643\u0627\u0645\u064a\u0646\u0632<\/a> ISF3.8 Gasket Kit<\/strong> is the only way to ensure a 100% leak-proof engine rebuild and long-term operational reliability.<\/p>\n\n\n\n

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ISF3.8-4376509 Cummins engine repair kit for diesel engine maintenance.<\/figcaption><\/figure>\n\n\n\n
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1.<\/font><\/font>Complete Parts List: What is in the Cummins ISF3.8 4376509 Kit?<\/h2>\n\n\n\n

The 4376509 Upper Engine Gasket Set<\/strong> is a comprehensive “top-set” for the \u0643\u0627\u0645\u064a\u0646\u0632<\/strong><\/a> ISF3.8 series<\/strong> 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<\/strong> solution.<\/p>\n\n\n\n

Technical Specification Table (Full Component List)<\/h3>\n\n\n\n
Part Number<\/strong><\/td>Part Description<\/strong><\/td>Required Qty<\/strong><\/td>Remarks \/ Function<\/strong><\/td><\/tr><\/thead>
4376509<\/strong><\/td>Upper Engine Gasket Set<\/strong><\/td>1 Kit<\/strong><\/td>Master Repair Solution<\/strong><\/td><\/tr>
5345648<\/td>Cylinder Head Gasket<\/td>1<\/td>Multi-Layer Steel (MLS) Seal<\/td><\/tr>
4946239<\/td>Valve Cover Gasket<\/td>1<\/td>Top Cylinder Head Seal<\/td><\/tr>
3955393<\/td>Valve Stem Seal<\/td>16<\/td>Intake & Exhaust Valve Control<\/td><\/tr>
2830444<\/td>Exhaust Manifold Gasket<\/td>4<\/td>Primary Exhaust Seal<\/td><\/tr>
5266422<\/td>Exhaust Manifold Gasket<\/td>2<\/td>Exhaust Connection Seal<\/td><\/tr>
4983020<\/td>Intake Manifold Gasket<\/td>1<\/td>Air Intake Efficiency Seal<\/td><\/tr>
5303597<\/td>Turbocharger Gasket<\/td>1<\/td>Turbo Mounting & Pressure Seal<\/td><\/tr>
5253019<\/td>EGR Valve Gasket<\/td>1<\/td>Emission System Sealing<\/td><\/tr>
5264571<\/td>Oil Drain Gasket<\/td>1<\/td>Turbo Oil Return Protection<\/td><\/tr>
4940584<\/td>Grommet Seal<\/td>4<\/td>Specialized Component Sealing<\/td><\/tr>
4932615<\/td>Connection Gasket<\/td>1<\/td>External Fitting Seal<\/td><\/tr>
4995186<\/td>Exhaust Outlet Connection Gasket<\/td>1<\/td>Connection System Gasket<\/td><\/tr>
5301826<\/td>O-Ring Seal<\/td>1<\/td>High-Temp Oil\/Coolant Seal<\/td><\/tr>
5259924<\/td>O-Ring Seal<\/td>1<\/td>High-Temp Oil\/Coolant Seal<\/td><\/tr>
5259563<\/td>O-Ring Seal<\/td>1<\/td>High-Temp Oil\/Coolant Seal<\/td><\/tr>
5257072<\/td>O-Ring Seal<\/td>1<\/td>High-Temp Oil\/Coolant Seal<\/td><\/tr>
3867646<\/td>O-Ring Seal<\/td>1<\/td>High-Temp Oil\/Coolant Seal<\/td><\/tr>
3090126<\/td>O-Ring Seal<\/td>1<\/td>High-Temp Oil\/Coolant Seal<\/td><\/tr>
2898295<\/td>O-Ring Seal<\/td>1<\/td>High-Temp Oil\/Coolant Seal<\/td><\/tr>
3963990<\/td>Sealing Washer<\/td>5<\/td>Bolt & Fitting Compression Seal<\/td><\/tr>
3684342<\/td>Sealing Washer<\/td>9<\/td>Bolt & Fitting Compression Seal<\/td><\/tr>
3918187<\/td>Sealing Washer<\/td>1<\/td>Drain Plug\/Fitting Washer<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
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2. Expert Analysis: Why the 4376509 Kit is Critical for Performance<\/h2>\n\n\n\n

MLS Technology in 5345648 Head Gasket<\/h3>\n\n\n\n

The 5345648 Head Gasket<\/strong> included in this 4376509 Upper Engine Gasket Set<\/strong> features Multi-Layer Steel (MLS). This is vital for the ISF3.8\u2019s high-pressure combustion cycle, preventing cylinder gases from escaping into the water jacket\u2014the primary cause of engine overheating in vehicles using the Foton Aumark Gasket<\/strong> system.<\/p>\n\n\n\n

Precision Sealing with 3955393 Valve Stem Seals<\/h3>\n\n\n\n

The 5345648 Head Gasket<\/strong> included in this 4376509 Upper Engine Gasket Set<\/strong> features Multi-Layer Steel (MLS). This is vital for the ISF3.8\u2019s high-pressure combustion cycle, preventing cylinder gases from escaping into the water jacket\u2014the primary cause of engine overheating in vehicles using the Foton Aumark Gasket<\/strong> system.<\/p>\n\n\n\n

3. Application & Compatibility Summary<\/h2>\n\n\n\n

The 4376509 Upper Engine Gasket Set<\/strong> is perfectly suited for high-performance diesel applications, especially where a reliable Foton Aumark Gasket<\/strong> or ISF3.8 engine parts<\/strong> are required:<\/p>\n\n\n\n