Im not sure if the 2004 m45 is quite the same,but check the oil level in the pump resivore for the fan,if its the same then it has a hydralic fan.The resivore is located under the plastic cover between the engine and radiator closer to the drivers side and it looks like its for the power steering pump oil.It has 2 lines,1 goes to the radiator,or cooler in the front of the radiator,the other 1 goes to the fan .
im not sure if the 2004 m45 is quite the same,but check the oil level in the pump resivore for the fan,if its the same then it has a hydralic fan.The resivore is located under the plastic cover between the engine and radiator closer to the drivers side and it looks like its for the power steering pump oil.It has 2 lines,1 goes to the radiator,or cooler in the front of the radiator,the other 1 goes to the fan .
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Sounds like a faulty thermostat.
Where is the water going you're adding?
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