NB 2002 1.6 AYD thermostat & smoke question

[niicoolet]

Hi just wondering everytime I started my beetle in a very cold weather (4°c to -4°c) in the morning there is no smoke at all, is it normal? And why my thermostat indicator lit up (blue) in the middle of cruisin' the highway? Thanks in advance!

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[mikk]

When I had that indicator light up on the highway in winter it was the water pump. The plastic impeller starts to fall apart when it gets old. Blades fall off or the impeller breaks off the shaft. The coolant flow gets reduced and coolant in the radiator gets too cold.