Dongfeng GX truck parts Warm air core assembly 8101020-C6100

Designed to quickly warm the Dongfeng GX’s cabin in low temperatures, the assembly features a dense aluminum micro-channel heat exchanger structure. It includes 60 thin aluminum tubes (1.8mm inner diameter) arranged in a staggered pattern, paired with 120 corrugated aluminum fins that maximize heat transfer surface area (1.2㎡). This design enables the core to transfer up to 5,000 W of heat from engine coolant to cabin air—raising the cabin temperature by 20–25°C within 5–8 minutes of engine startup (even at -30°C ambient temperature). Unlike low-efficiency cores with fewer fins, it maintains consistent heating performance at low engine speeds (e.g., idling during loading/unloading), ensuring driver comfort during all operating conditions

To prevent coolant leakage (a major cause of HVAC failure), the assembly incorporates a multi-layer sealing system. The aluminum tubes are brazed to the core’s header plates using high-temperature vacuum brazing technology, creating a permanent, leak-proof bond that withstands coolant pressure up to 150 kPa. The coolant inlet/outlet ports are fitted with EPDM rubber O-rings that maintain elasticity in temperatures ranging from -40°C to 150°C, ensuring a tight seal with the HVAC system’s coolant hoses. Additionally, the entire core is coated with a corrosion-resistant aluminum oxide layer (via anodization), protecting against rust from coolant additives or moisture—extending the core’s service life to over 8 years

Built to withstand the harsh conditions of truck cabin operation (vibration, temperature cycles, and dust), the assembly uses rugged materials. The core’s tubes and fins are made of 3003-series aluminum alloy, a lightweight yet strong material that resists bending or cracking from road vibration. The core’s outer frame is crafted from high-impact ABS plastic that protects the delicate micro-channels from damage during installation or cabin cleaning. The plastic frame also includes pre-molded mounting tabs that align with the HVAC housing’s brackets, reducing stress on the core during vibration. Rigorous testing confirms the assembly endures 100,000+ vibration cycles (10–2,000 Hz) and 5,000+ temperature cycles (-40°C to 120°C) without structural damage

Engineered for efficient replacement in repair shops, the assembly simplifies installation with user-friendly features. It includes pre-attached mounting clips that snap into the Dongfeng GX’s HVAC housing, eliminating the need for additional fasteners. The coolant ports are marked with “IN” and “OUT” labels to prevent reverse connection, and the core’s size matches the original unit exactly—no modifications to air ducts or coolant lines are needed. Installation takes 45–60 minutes using standard hand tools, reducing truck downtime for fleet operators. The assembly is fully compatible with Dongfeng GX’s original HVAC controls (e.g., temperature knobs, fan speeds), ensuring seamless integration with the cabin’s heating system. Backed by a 24-month warranty against manufacturing defects (e.g., coolant leakage, fin damage, or seal failure), it provides reliable heating performance and peace of mind for Dongfeng GX truck owners