1990-1997 Lexus LS400 Engine Cooling System Thermostat Replacement Instructions

Master Technician Viktor G shows the DIY how-to thermostat removal and installation procedure on the LS400 models. The issue that this fixed was the engine not warming up fully and not reaching the proper operating temperature, resulting in not very hot air blowing from the vents in winter. The SC400 and Celsior are done in a similar way.