Overheating?
Good morning,
I have the following problem on my Defender 90 300tdi. My gauge is currently showing 100 degrees Celsius even after only a short drive of about 5 km, and if I drive a bit more "sporty " it quickly reaches 110 degrees.
The gauge isn't original, but it came with its own compatible sensor. When the gauge shows this temperature, I measure 90-95 degrees Celsius at the sensor with a laser thermometer,
but the upper radiator hose only reads 65-70 degrees Celsius, and the lower one is in the 50s. The engine has been completely rebuilt, including the water pump, hoses, radiator, etc.
The thermostat has been in for about 6 months without any problems, and I reused it when I rebuilt the engine 3 months ago.
The strange thing is, sometimes it stays perfectly at 90 degrees without overshooting, and sometimes it does.
Hope someone has an Idee.