Quote:
Originally Posted by t walgamuth
Brian is right. Clearly the car cooled fine before you removed the head. Just sitting there did not affect your car's cooling ability. Its most likely a large bubble of air trapped in your system.
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Yes, you are right. I agree . There is no other reason for the SDL not to cool correctly. Radiator still has a new looking inventory code sticker on it from MB.
New fan clutch and fan, new thermostat that is functioning correctly and yes,, it did cool well last time it ran. Passages in the head are all very clean, just don't have the build up of crud in the cooling passages.
I hope that the temperature on the gauge was correct and did not indicate a temperature lower than the actual temperature due to the air space in the head. My concern is that if the air pocket was sufficiently large, it may have reduced the liquid contact area on the sensor and give a false low reading.
The sensor for the temperature gauge is in the head and the sensor in the upper radiator hose neck is for the EDS .