Thermostat Visual Inspection
1. Remove the thermostat housing.
2. Examine the thermostat for signs of damage including:
Valve not fully seated (light visible through the valve)
Foreign material lodged in the main valve
Bent or broken frame or flange
Bent or broken spring
Wax leaking from wax reservoir or a bulge in the reservoir
Any other damage or distortion
NOTE: If no damage is found during the inspection, do not attempt to open the thermostat using hot water or other heat sources. This method is not an accurate means to test the function of the thermostat and may damage the thermostat.
3. If damage is found during the inspection, remove any foreign material or broken pieces and install a new thermostat housing.
Radiator Leak Test, Removed From Vehicle
NOTE: Never leak test an aluminum radiator in the same water that copper/brass radiators are tested in. Flux and caustic cleaners may be present in the cleaning tank and they will damage aluminum radiators.
NOTE: Clean the radiator before leak testing to avoid contamination of tank.
1. Leak test the radiator in clean water with air pressurized to the maximum pressure listed in the SPECIFICATIONS .
Original technical text and illustrations, formatted as HTML. Follow the engine, transmission, equipment, model and year specified in the source. Import and layout checks do not establish applicability to every 2015–2017 Mustang. About this collection.