4089649 3804897 2881955
for Dongfeng
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| Engine Gasket Set Technical Specifications | |
| Attribute | Details |
| Part Name | Upper Engine Gasket Set / Head Gasket Kit |
| Part Number | 4089649 3804897 2881955 |
| Main Materials | High-grade metal composite materials, high-temperature resistant rubber, and interface sealing materials (usually asbestos-free) |
| Compatible Engines | for Cummins B Series 5.9L (6BT / 6BTA / 6B) - 12-valve version |
| Number of Components Included | Approximately 45 - 55 pieces (depending on brand packaging) |
| Key Core Components | Cylinder Head Gasket: 1 piece (usually multi-layer steel or composite material). |
| Rocker Cover Gaskets: 6 pieces (split valve cover design). | |
| Exhaust Manifold Gaskets: 6 pieces. | |
| Intake Manifold Gasket: 1 piece. | |
| Valve Stem Seals: 12 pieces (intake and exhaust interchangeable or separate). | |
| Thermostat Seals: 1 set. | |
| Turbo Gaskets: 1 set. | |
| Various Copper Gaskets and O-rings: For injectors, return lines, coolant connections, etc. | |

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Various industrial equipment, generator sets, and medium-sized trucks equipped with Cummins 6BT series engines

Performance Characteristics
Extreme Environment Resistance: The metal composite cylinder head gasket, designed for high compression ratios in diesel engines, can withstand high temperatures and pressures.
Superior Sealing: Rubber components (such as valve stem seals) are made of fluororubber (Viton) or high-grade nitrile rubber, offering strong anti-aging and oil resistance. Most aftermarket versions in 2025 will use asbestos-free materials.
OEM Standard: Precision down to the micron level ensures perfect alignment of all channels (water, oil, and air passages) after installation.