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Bad Thermostat?
I'm changing my coolant and I think I have a bad thermostat. I filled the coolant tank to the filler neck and ran the car until the thermostat should open like the Bentley manual says. The coolant temperature got to 90 degrees Celsius and the hose from the thermostat housing to the front of the car was still cold. Very little drop in the level of the coolant tank and no fans turned on.
This might also explain why the coolant temp gets to 108C when stuck in traffic.
Time to replace the thermostat?
Regards,
mike
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