Step | Action | Yes | No | ||||
---|---|---|---|---|---|---|---|
Important: The temperature stick is a pencil-like device that has a wax material containing certain chemicals which melt at a given temperature. Use the temperature sticks to determine a thermostat's operating temperature by rubbing 87°C (188°F) and 97°C (206°F) sticks on the thermostat housing. The marks made by the sticks should melt when coolant temperatures reach 87°C (188°F) and 97°C (206°F), respectively. These temperatures are the normal operating range of the thermostat. If the coolant flows as indicated in the table, the thermostat may be worn. | |||||||
1 |
Is there coolant flow before the mark melts? | Go to Step 2 | Go to Step 3 | ||||
2 | The problem is caused from something other than the thermostat. Does the engine still overheat? | Go to Engine Overheating | System OK | ||||
3 |
Does the engine still overheat? | -- | System OK |