Isuzu 8973007902 Thermostat Assembly

The Isuzu 8973007902 is a wax-pellet engine coolant thermostat designed to regulate engine operating temperature at 82°C primary opening with 85°C secondary stage. It maintains optimal thermal efficiency for Isuzu 4HK1, 4HE1, 4HF1, and 4HG1 diesel engines across commercial truck and construction machinery applications. Constructed with stainless steel valve, brass body, and copper wax element for corrosion resistance and precise temperature calibration. The unit includes integrated jiggle pin for air bleeding during coolant fill. Net weight 0.12 kg. Direct OEM replacement for Isuzu part numbers 8-97300790-2, 8973007872, 8973007903, 8973007901, 8973007900, and 8973007873. Cross-references JCB 02/802212 and Isuzu Select Parts 1876184300.