JAC Reying Refine Thermostat B54KE-82 Compatible with 4GB1/S5/S3 Efficient Heat Dissipation

Your Hongqi (JAC) Ruixing or Ruijie’s water temperature gauge fluctuates during driving, or warm air is not hot and engine warms slowly, usually due to thermostat aging or sticking, failing to properly open/close. The thermostat closes the bypass circuit when cold to help engine reach operating temperature quickly; when hot, it opens to route coolant through the radiator to maintain optimal cooling. Compatible with JAC Ruixing, Ruijie models powered by 4G B1, S5, S3 engines. OEM B54KE-82 (also compatible with 1027305GB, 31312). Apply sealant to the gasket during installation and ensure correct orientation to avoid misassembly causing improper coolant circulation.