Quote:
Originally Posted by Phoenix704
Highly unusual - as previously mentioned, sounds like a bad sensor. It's very possible that a bad coolant sensor is improperly keeping the thermostat open when the engine is cold, which would cause the car to warm up veryyy slowly. This could be the reason for the oil temperature rising slowly as well.
|
If the car thinks that the water temperature is too low, if anything, it’d keep the thermostat closed, not open. That means that you’d get no coolant flow through the radiator(s), even when the water’s up to temperature. There’s a pretty bad overheating hazard.
But I think that the N55 thermostat isn’t strictly electrically controlled. It does have an electrical connection, but I think the thermostat is primarily a mechanical device with electric input to tweak its operation. That makes a huge difference here. Probably no overheating risk. Probably.
The B58, which replaces the thermostat with a “heat management module,” would be a different story.