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Engine Coolant Capacities: Thermostat

On all engines except V6, thermostat is located in water outlet elbow. On V6 engines, thermostat is located on bottom of water pump housing. Thermostat housing connects to lower radiator hose. Test thermostat to see that it starts to open, and is fully open at specified temperatures.

Thermostat Opening Temperatures (°F)

Application Starts Open Fully Open
140"4-Cyl. 188-195 212
2800cc V6 192-199 226
200" 6-Cyl. 188-195 212
250" 6-Cyl. 193-200 221
All V8 193-200 221