Hey out there,
Wondering if anyone else has experienced this?
I have an 08 d40 4.0l and it seems the thermostat has failed in the closed position. I know they are supposed to fail open. At the moment I'm getting coolant boiling and top hose hot. Bottom hose is still stone cold. I'm assuming if the water pump has failed that even though there isnt water flow (which there seems to be) thermostat would be open and bottom hose would be hot?
All symptoms point to thermostat but it seems this one has failed closed. Am I completely wrong here or does it happen?
Regards Sam
Wondering if anyone else has experienced this?
I have an 08 d40 4.0l and it seems the thermostat has failed in the closed position. I know they are supposed to fail open. At the moment I'm getting coolant boiling and top hose hot. Bottom hose is still stone cold. I'm assuming if the water pump has failed that even though there isnt water flow (which there seems to be) thermostat would be open and bottom hose would be hot?
All symptoms point to thermostat but it seems this one has failed closed. Am I completely wrong here or does it happen?
Regards Sam