Dongfeng LoongGine engine parts cylinder head gasket 10BF11-03020

Built to withstand extreme combustion pressure and temperature, this gasket adopts an advanced 5-layer metal composite structure. The core layer is a 0.5mm-thick stainless steel (304) sheet that provides rigid support, while the upper and lower layers are 0.3mm-thick soft aluminum sheets for excellent conformability to minor surface irregularities (≤0.05mm). Between the layers, a heat-resistant graphite coating (0.05mm) enhances sealing and reduces friction. Each cylinder bore is reinforced with a stainless steel fire ring (1.5mm thickness) that resists deformation under 20MPa combustion pressure—preventing cylinder pressure leakage and ensuring compression ratio stability (18:1 for DD11 engines). This structure maintains a leak-tight seal even during engine overloads

Engineered to endure the extreme high-temperature environment of the combustion chamber (peak temperatures up to 1500℃), the gasket uses heat-resistant materials and treatments. The stainless steel core and fire rings maintain structural integrity at continuous operating temperatures up to 650℃, resisting thermal fatigue and warping. The graphite coating exhibits thermal stability up to 800℃, avoiding degradation or carbonization. The gasket undergoes a high-temperature annealing process (400℃ for 2 hours) to eliminate internal stresses, ensuring dimensional stability after repeated thermal cycles (from 20℃ to 600℃). This heat resistance prevents gasket failure caused by thermal shock, extending service life to ≥250,000km

Optimized to resist corrosion from engine fluids and combustion by-products, the gasket integrates multiple protective features. The aluminum layers are coated with a corrosion-resistant chemical conversion film (chromate-free), preventing rust and pitting from coolant (ethylene glycol) and engine oil. The graphite coating is inert to acidic combustion by-products (e.g., sulfur oxides), avoiding chemical erosion. The stainless steel components pass 2000-hour neutral salt spray testing (ASTM B117) with no red rust, ensuring durability in humid or saline-alkali environments. This resistance prevents fluid cross-contamination (e.g., coolant mixing with oil) and avoids expensive engine damage caused by gasket corrosion

The cylinder head gasket is designed for efficient installation and long-term cost savings, ideal for engine overhauls and fleet maintenance. Its rigid composite structure maintains shape during handling, ensuring easy alignment with the cylinder block’s bolt holes—reducing installation time by 35% compared to soft gaskets. The gasket requires no additional sealants (thanks to the graphite coating’s inherent sealing property), avoiding messy application and sealant-related leaks. By preventing cylinder pressure leakage and fluid cross-contamination, it improves engine fuel efficiency by 3-5% and reduces overhaul costs by 60%. Backed by a 2-year/200,000km warranty, it provides reliable performance for heavy-duty operations, minimizing unplanned downtime and repair expenses