Dongfeng KL truck parts Warm air core 8101115-C3100 in stocked

Designed as the core heat transfer component of the truck’s heating system, this warm air core features an optimized structure to maximize heat exchange efficiency. It uses a multi-layered aluminum micro-channel design: 48 thin-walled channels (each 1.2mm wide) create a total heat exchange area of 1.8㎡—30% larger than traditional tube-and-fin cores. Engine coolant (heated to 80–95°C) flows through the channels, while the truck’s blower pushes cold cabin air over the core’s external fins; the micro-channel structure accelerates heat transfer, enabling the core to raise cabin temperature by 15–20°C in 5–8 minutes (critical for cold-start conditions). The fins are louvered (0.3mm thick) to disrupt airflow and increase heat absorption, ensuring even heat distribution across the core. Unlike low-efficiency cores that struggle to warm large truck cabs, this design maintains consistent warmth even in -30°C extreme cold

Built to withstand the corrosive effects of engine coolant and temperature fluctuations, the warm air core uses high-grade materials for long-term durability. The core body and channels are made of 3003 aluminum alloy (with a corrosion-resistant chromate coating), which resists pitting, scaling, and chemical degradation from ethylene glycol-based coolants (the standard in truck cooling systems). The inlet/outlet pipes are extruded aluminum (reinforced at the flange connections to prevent cracking from vibration) and feature a powder-coated finish for extra corrosion protection. Unlike copper-brass cores that are prone to rust and heavy metal leaching, this aluminum design is 40% lighter (reducing HVAC system weight) and maintains structural integrity through 300,000+ km of use—even in regions with harsh winter road salt exposure

Engineered to eliminate coolant leaks (a major risk for engine overheating and cabin heating failure), the warm air core integrates multiple leak-proof features. The core’s channel-to-flange connections are brazed using a high-temperature aluminum-silicon alloy (brazing temperature: 580°C), creating a permanent, gap-free seal that withstands coolant pressure up to 1.5 MPa (exceeding Dongfeng KL’s maximum system pressure of 1.2 MPa). The inlet/outlet pipes are crimped and sealed to the flange with EPDM O-rings (70 Shore A hardness) that compress tightly against the factory coolant lines, preventing seepage at the connection points. Each unit undergoes a 24-hour hydrostatic pressure test (1.8 MPa) and a vacuum leak test (-90 kPa) before leaving the factory—ensuring zero leakage. Unlike poorly sealed cores that require frequent repairs, this design maintains coolant system integrity for the core’s entire service life

The warm air core is designed to operate reliably under the extreme pressure and temperature variations of truck engine systems. It tolerates coolant temperatures ranging from -40°C (cold storage/transport) to 130°C (engine overheat conditions) without cracking or deforming, thanks to the 3003 aluminum alloy’s high thermal stability (melting point: 660°C). The core’s internal flow design minimizes pressure drop (≤0.1 MPa at maximum flow rate of 10 L/min), ensuring coolant circulates smoothly without straining the engine’s water pump. Additionally, the core’s fins are reinforced to resist damage from debris (e.g., dust, leaves) that may enter the HVAC system—preventing airflow blockages that reduce heat output. Each unit undergoes strict environmental testing: temperature cycling (-40°C to 130°C, 500 cycles), vibration testing (10–2,000 Hz, 20G acceleration), and dust ingress testing (IP6X standard). Backed by a 24-month warranty against manufacturing defects (e.g., leakage, channel blockage, fin damage), it provides Dongfeng KL truck owners with a reliable, low-maintenance heating solution for winter operations