I have a 98E0, had the water pump change bout 60000 miles, after 4000 miles my temp gauge would go to Letter O to M sometimes all the way to A but once it hit A the fan will engauge. It seems the temp will rise quickly than BEFORE especially when sitting on Traffic or Drive Inn at fast food chains but once the car starts moving it goes back to between O & R. Is this normal? TIA for any help.